Aluminum Camper Forum

Camping => Trip Report/Photos => Topic started by: LivinLite AZ on September 22, 2017, 03:56:59 AM

Title: Eight Days in Southern Utah
Post by: LivinLite AZ on September 22, 2017, 03:56:59 AM
Hi All.

We just returned from eight days on the road for our UT/CO anniversary trip. This was our first 'real' trip in our 13QBB. Minus the generator that stayed home, this was a full systems and camping workflow test. While we did end up with a considerable list of future tweaks, mods, and upgrades by the end, we are thoroughly thrilled with our CL! We were quite pleased with our numerous mods and upgrades to date as well. I have listed links at the end for the goodie list.

(http://sedonanonymous.com/my-images/2017-Trip/Heading-Home.JPG)
Hitting the Trail

MODS & OBSERVATIONS

The 3.5" lift kit I installed to augment our off road package saved our rear bumper and deck several times - see https://aluminumcamperforum.com/index.php?topic=655.0 . The 'bamboo' foam tile flooring was a godsend (and great insulation too). The double folding steps from Range Kleen were so hands down great, that I will be skipping my planned 'step repositioning mod' https://aluminumcamperforum.com/index.php?board=7.0 and removing the factory step altogether (yay! More ground clearance). Depending on what angle we were parked, the Range Kleen steps were always within +/- 1" of the factory step, making it redundant. Uneven ground turned out not to be a problem for the steps. I was always easily able to reliably shore up the footing for a secure and even step. They seem as solid, and notably easier to use than the stock step.

(http://sedonanonymous.com/my-images/Bamboo-Foam-Floor-Steps.jpg)
Bamboo-Foam-Floor-and-Steps

One caveat of our lift kit is the scissor jack height. The 24" jacks still work fine on a flat surface, but we only once parked on a flat surface during our trip. So my 8"x7"x2" wood blocks worked a treat, sometimes needing up to 5 to get it just so. The trailer was never disconnected from Jeep, so I wasn't too concerned with stability or stressing the jacks.

BTW, we were marveling at how solid and well insulated the CL is. Howling winds sound like barely a whistle and it never made a creak or a quiver. Granted, we're comparing to a pop up. Our queen size Coleman airbed with 1.5" egg crate foam on top and underneath (doubles as cabin insulation) was so very comfortable, that we are scrapping our memory foam bed project.

The jack bed sofa mod. To date in this forum I have not touched on my interior mods, but this one made a HUGE difference to livability inside the trailer. This mod is for those of you with the jack bed configuration who do not need the 'bed' function and are wishing for more living space comfort. Additional benefit: a perfect place to store long items, like umbrellas, conveniently behind the hinged bench back. The photos tell the story somewhat, but I guess this should go under the Mods area, so I will do a full how to thread for this soon So I posted a full 'how to' writeup here if anyone is interested: https://aluminumcamperforum.com/index.php?topic=692.0 . This mod adds 5" to the bench depth and several degrees of rake/recline to the sofa back. Ahh, so comfortable and relaxing for two now (great for giving simultaneous foot rubs). Before this mod, it was so upright and shallow that there was no comfortable way to sprawl out.

(http://sedonanonymous.com/my-images/Sofa-Mod.jpg)
Sofa Before and -> After

TOWING

With our new 4.55 gears, the Jeep pulled like a champ and my DIY frankenstein transfer case (front half of an NP249, rear half of an NP242) worked flawlessly. Headwinds and side winds were fierce on one particular leg approaching and leaving Moab, with gusts up to at least 60mph in driving rain. We were giddy at the immediate effect that these frontal wind blasts inflicted (sometimes losing 10mph in an instant going uphill), but pleasantly astonished at the rock steady performance of our Reese Friction Sway Control bar through the intense side gusts. With this device, passing or being passed by semis was a non issue.

We averaged 9.9 MPG over 1300 miles. I know that sounds terrible, but I'm lucky to get 13 around town with no trailer.

The Tekonsha Primus 90160 Brake controller worked well, but I could never find a happy medium between too much and not enough brake assist. I needed to manually dial in more or less trailer braking in proportion to my speed, which I got used to.

Our Pyle rear view backup camera was certainly helpful backing up, but since I connected the reverse light power lead to positive, the camera stayed  powered on and helped me reduce my burden on faster traffic from behind.

MOBILITY

Our main concern heading out was that with the 11 foot height of our CL vs the 4 foot folded height of our previous pop up, we may not be able to get to some of our favorite spots due to the tree carnage potential. I paid close attention to the new height factor when navigating heavily off camber rutted trails which compound the tree exposure considerably towards the direction that the trailer would lean. I am happy to say that with careful maneuvering, we were able to get to our remote spot without incident.

(http://sedonanonymous.com/my-images/2017-Trip/Towing-Offroad.JPG)
Towing-Offroad

THE JOURNEY

My wife is an amazing cook and baker. While I was prepping the Jeep and Trailer, she spent days preparing a menu for many moods. Our fridge accommodated eight days of meals - three and four a day. I did not miss digging through a soggy cooler.

(http://sedonanonymous.com/my-images/2017-Trip/Valley-of-the Gods.JPG)
Valley-of-the Gods

We left Sedona Monday evening and topped off in Flagstaff. North across Navajo land then east towards Monument Valley. Then north across the San Juan river to slumber in the Valley of the Gods. Early up and off to Cortez en route to Norwood for a short stay with my amazing cousin, Craig Childs. He is an author of several cult books on backcountry adventure and archeological significance in the southwest, among other topics. Needless to say we had a memorable time. It was truly an honor to geek out with someone on Google Earth and hear first hand accounts of what treasures lie hidden out there.

(http://sedonanonymous.com/my-images/2017-Trip/Norwood-CO-Sunset.JPG)
Norwood-CO-Sunset

We enjoyed taking a very scenic drive from Norwood to Moab. The furious thunderstorms kindly put on a show while keeping enough distance that we only got a sprinkle here and then. The Mavericks gas station in Moab had free potable water and a friendly dump station. This was our first dump - ever - and mercifully I didn't end up looking like too much of a noob, and more importantly everything went smoothly and I didn't get splattered.

Then the wind arrived in force just as I finished fueling. Ready to roll again. Up the pass past Arches NP then south towards Dead Horse State Park. Fierce headwinds and torrential rain. Luckily traffic was light as we struggled up the hill. Ok, now up on top of the Grand View peninsula, turn left down Long Canyon towards Pucker Pass. Cats and dogs, alternating mud and washboard. Crest the vista to find our spot and...

(http://sedonanonymous.com/my-images/2017-Trip/Camping-Above-Canyonlands.JPG)
Camping-Above-Canyonlands

..."NO CAMPING" stakes at every camping spot. UH OH! We were there nine months ago and the usual 10 or so sites were being well enjoyed. We have been camping at this mind blowing vista for 15 years, every year. So we trolled past one no camping sign after another, stewing with disappointment. "How could they do this?" Then I saw one tiny path that hadn't been staked off (yet). We slithered through sand and squishy mud until I found a suitable spot to hole up through the storm (free car wash). It is a must see spot, but I'll leave it at that since our odds of camping there again are slim.

(http://sedonanonymous.com/my-images/2017-Trip/View-Out-the-Door-Canyonlands-La-Sals.JPG)
View-Out-the-Door-Canyonlands-La-Sals

Awake to a lovely day. Breakfast and then on the road to Boulder Utah. This is our home away from home. It lies in the heart of the Escalante Grand Staircase between Capitol Reef and Bryce Canyon. Gas up at Hills and Hollows in Boulder, fill fresh water tank, grab some firewood and off to our secret spot on a remote knoll with near a 360 view in all directions. Light rain and flashes of lightening as we arrived at our destination. Level the trailer when the skies clear and viola, here we would perch the the next four days. Playing games, flying drones, eating, drinking and making merry. Loving our new CampLight and more importantly, each other - 26 years on.

Sad to pull up stakes, but happy for another scenic drive home past Bryce and then lunch at the always whimsical Red Canyon. Then on down to Kanab and on to Lake Powell, followed by the long dark haul up through the Navajo Reservation. With Flagstaff in sight and an hour to go, we agreed that couldn't feel too sorry for ourselves with that post vacation let down since we do, after all, live in Sedona, which is a vacation in and of itself.

MORE PHOTOS

(http://sedonanonymous.com/my-images/2017-Trip/Canyonlands-La-Sal-Maountains.JPG)
Canyonlands-La-Sal-Maountains

(http://sedonanonymous.com/my-images/2017-Trip/View-Out-the-Door-Escalante-Grand-Staircase.JPG)
View-Out-the-Door-Escalante-Grand-Staircase

(http://sedonanonymous.com/my-images/2017-Trip/Poodle-Crossing.JPG)
Poodle-Crossing

(http://sedonanonymous.com/my-images/2017-Trip/Yay-Campfire.JPG)
Yay-Campfire

(http://sedonanonymous.com/my-images/2017-Trip/Reflected-Sunset.JPG)
Sunset Reflections

(http://sedonanonymous.com/my-images/2017-Trip/Escalante-Grand-Staircase-Boulder,-UT.JPG)
Escalante-Grand-Staircase-Boulder
UT

(http://sedonanonymous.com/my-images/2017-Trip/Red-Canyon-Outside-of-Bryce-Canyon.JPG)
Red-Canyon-Outside-of-Bryce-Canyon

GOODIE LIST

Wood look foam flooring:
https://www.amazon.com/gp/product/B010MCY0RY/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

Range Kleen double steps:
https://www.amazon.com/gp/product/B007EEG7M0/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

3.5 inch lift kit:
http://perfectcasita.com/casita-axle-lift-kit.html

Reese Friction Sway Control bar
https://www.amazon.com/gp/product/B004O2NDEK/ref=oh_aui_search_detailpage?ie=UTF8&psc=1

So there you have it. We are planning another Boulder UT trip in October, so these memories will keep me going in the meantime.

: ) S
Title: Re: Eight Days in Southern Utah
Post by: Diversteve on September 22, 2017, 08:03:58 AM
WOW!!!
What a beautiful trip.
Your rig looks perfect i know you had a great time.
Camp on!
Title: Re: Eight Days in Southern Utah
Post by: PYG RYDR on September 22, 2017, 11:54:10 AM
Very nice camp report!

Glad to see you enjoying your camper and mods!

Camp on!
Title: Re: Eight Days in Southern Utah
Post by: gbpack on September 22, 2017, 02:34:27 PM
Great trip report! It's fantastic that you can get back in those backcountry spots with your trailer. Even though we have the off-road package and a 2015 Jeep Grand Cherokee with V-8, I'm not sure that our 21BHS would be able to make into some of those spots. I think it might be a little too long and bottom out or drag our butt, which would probably damage the grey and black tank drains that hang down back there. But we're going to look for some backcountry boondocking opportunities sometime when we're in those types of areas. Thanks again!
Title: Re: Eight Days in Southern Utah
Post by: LivinLite AZ on September 22, 2017, 03:27:44 PM
Great trip report! It's fantastic that you can get back in those backcountry spots with your trailer. Even though we have the off-road package and a 2015 Jeep Grand Cherokee with V-8, I'm not sure that our 21BHS would be able to make into some of those spots. I think it might be a little too long and bottom out or drag our butt, which would probably damage the grey and black tank drains that hang down back there. But we're going to look for some backcountry boondocking opportunities sometime when we're in those types of areas. Thanks again!

Hi gbpack.

It was tight in spots with our 13QBB, so I'm sure your 21BHS would get some new pinstripes at the very least. However, there are many semi remote places in the Escalante Grand Staircase area where you could have the place to yourself that would easily allow your 21 to pass unscathed. Let me know if your plan to find yourself in the area and I could give some suggestions.

: ) S
Title: Re: Eight Days in Southern Utah
Post by: Merlin on September 22, 2017, 04:33:52 PM
Wonderful report and great photos. All your work so far really paid off.  :)

Why the front of a NP249 and back of a NP242?

You might want to replace the Primus with a Prodigy P3 to avoid the brake hassle.
Title: Re: Eight Days in Southern Utah
Post by: LivinLite AZ on September 22, 2017, 05:58:58 PM
Wonderful report and great photos. All your work so far really paid off.  :)

Why the front of a NP249 and back of a NP242?

You might want to replace the Primus with a Prodigy P3 to avoid the brake hassle.

Hi Merlin.

Can't wait to get back to Boulder in October : )

Why the frankencase? It's a little painful, but here goes...
My 1994 JGC came with the 'upgraded' NP249 TC. This case was used in the Limited models and provides three TC lever positions - AWD, N, 4lo. But I really missed the 'tail happy on demand' nature of the rear wheel drive in my previous Cherokee on dirt roads. The AWD with the NP249 meant that I had to implement the 'Scandinavian Flick', ie upsetting the chassis by jerking the wheel the opposite direction and then whipping it the other way for any drifting. Too much commitment with that maneuver to be much fun. Also, the 249 uses a viscous coupler to 'lock' the front and rear driveshafts together in 4lo. There were occasions when seriously rock crawling where I would end up with one wheel drive (open diffs). These couplers also wear out (amazingly, mine never did tho).

The NP 242 provides 5 TC lever positions - 2hi, AWD, 4hi (part time), N, 4lo. This case is somewhat rare in the JGCs, most being equipped NP231s. The reason for the frankencase was due to the fact that sometime midyear in 1994 they changed the annular gear gut in the front case half from rounded teeth to pointed teeth, as well as the planetaries that mesh with the annular gear. Usually one can get away with just swapping the planetary gear cluster from the 249 into the 242 (Assuming you have the right tailshaft length, which I did). However mine was made in June 1994, and Chrysler did not track the gear cut change by VIN. I spoke with a Jeep expert who assured me that the gear cut would make no difference in my application. Wrong.

The used NP242 from a 1995 JGC Limited I picked up for $300 was in pristine shape but I meticulously went about the planetary swap, changed seals, output bearings, etc. I RTV'd that sucker back together and modified the shift linkage and went for a test drive. It seemed to work as expected but with the TC in neutral it was making an unhappy whirring sound. I called Mr. Jeep again and described the symptom. Turns out when I spoke to him the first time, he had reversed in his mind that I was swapping a 94 into a 95, not the other way around. Whoops.

Time to do it all over again. Because the annular gear is pressed into the front case half, it cannot be moved between cases. Luckily, the 249 and 242 front case halves are interchangeable. So I tore everything apart again and replaced the seals and bearings in the front half of the 249 and slapped it all together again. I know Mr. Jeep was trying to save me some steps, but I wish I done this to begin with. My weekend project turned into a 30 hour ordeal - most of the time spent scraping fresh RTV off after the first attempt. Now I can enjoy RWD again : )

Thanks for the heads up on the Prodigy. The reviews were so positive for the Primus, I thought I was barking up the right tree.

: ) S



Title: Re: Eight Days in Southern Utah
Post by: pjcd on September 22, 2017, 06:16:25 PM
Very nice!
Title: Re: Eight Days in Southern Utah
Post by: Merlin on September 22, 2017, 08:30:10 PM
I'm glad I asked! That TC story was a doozy. The 242 is much more versatile, but I'm not sure being able to drift was worth all that.  :o Anyway, I hope you post on a Jeep forum too; you've got some interesting experience to pass along!  Keep up the Camplite mods too' I'm stealing all your good ideas (just the good ones, though  ;) )

Seeing your Jeep and camper flex on the "road" in to your campsite had me wondering if you will hit the limits of a standard 2" hitch/receiver on your travels?
Title: Re: Eight Days in Southern Utah
Post by: LivinLite AZ on September 22, 2017, 08:40:40 PM
I'm glad I asked! That TC story was a doozy. The 242 is much more versatile, but I'm not sure being able to drift was worth all that.  :o Anyway, I hope you post on a Jeep forum too; you've got some interesting experience to pass along!  Keep up the Camplite mods too' I'm stealing all your good ideas (just the good ones, though  ;) )

Seeing your Jeep and camper flex on the "road" in to your campsite had me wondering if you will hit the limits of a standard 2" hitch/receiver on your travels?

1) I'm really not a hooligan. I just don't like understeer. It's a safety issue you see. But seriously, the 249's viscous coupler's days were numbered after 160K miles with many serious off road traction events under its belt.

2) Which mods do you like/disapprove of? I just posted my Jack Bed Sofa Mod here: https://aluminumcamperforum.com/index.php?topic=692.0

3) Yeah. we tested that hitch coupler pretty well, but I have my eye on a uni-joint setup in the future. Not sure of the implications for my friction sway control bar tho. See attached pic...

: ) S
Title: Re: Eight Days in Southern Utah
Post by: 4t34ju801tu8rtu19rt on September 23, 2017, 07:26:06 PM
Great Pictures and report. Nice very Nice!
Title: Re: Eight Days in Southern Utah
Post by: Paul on September 24, 2017, 12:38:23 AM
Really interesting to read!
Title: Re: Eight Days in Southern Utah
Post by: catmanriff on September 25, 2017, 01:17:27 PM
great post, fantastic pictures and story!
Title: Re: Eight Days in Southern Utah
Post by: LivinLite AZ on September 26, 2017, 02:47:06 AM
great post, fantastic pictures and story!

Hi catmanriff. Thanks for the thumbs up. I've been too busy the last few days to thank everyone. So, thank you fellow Aluminites for your kind comments. Being my first travel post, I really appreciate the encouragement! I can't wait to get back out there before winter closes in. Hopefully I'll have another trip report by the end of October. We're planning another Escalante /Boulder trip and I'll be shutterbugging and maybe capture some video worth sharing from that trip. Stay tuned : )

S
Title: Re: Eight Days in Southern Utah
Post by: nolichuckyjake on October 12, 2017, 10:01:36 PM
Enjoyed your trip account very much.   My wife and I are just beginning our trailer camping, and have a new '18 16DBS--with the "off-road" package.   

A question for you is-- do you get any benefit from having off-road tires on a trailer, other than possibly getting a little more height from them?   
Title: Re: Eight Days in Southern Utah
Post by: LivinLite AZ on October 12, 2017, 11:02:49 PM
Enjoyed your trip account very much.   My wife and I are just beginning our trailer camping, and have a new '18 16DBS--with the "off-road" package.   

A question for you is-- do you get any benefit from having off-road tires on a trailer, other than possibly getting a little more height from them?   

Hi There nolichuckyjake.

Welcome to getting spoiled by trailer camping. My wife and I are happily adjusting to our 13QBB after 8 years with our off road modded popup. As you will deduct from my threads on this forum, we are an adventurous pair, who go to great lengths to get off the beaten path, seeking grand vistas and solitude. This almost always requires 4 wheel drive and ground clearance. So, more height is always welcome, and sometimes necessitated. Off road tires tend to be taller, but more importantly, they have robust sidewall construction that allows for extreme airing down (EX: 10 psi for sand) and provides superior rock puncture resistance.

If you stick to maintained roads, any decent tire will do - Maxxis seems to be the favorite on this forum. Just remember that even an off road tire will be susceptible to tread punctures by rocks if you are aired up for highway travel (40-60psi) and moving at a decent clip down dirt roads. Ask me how I know.

Many happy adventurous in you 16DBS : )

Steve

Title: Re: Eight Days in Southern Utah
Post by: nolichuckyjake on October 12, 2017, 11:40:33 PM

Thanks for the reply.   Yes, airing down is at least a possibility in our future, though I don't have any experience off-roading---we do want to get out into the deserts of the SW.  Towing with a 2500 series Ram Tradesman 4WD, which looks lifted, but they tell me it's stock.  Good clearance, anyway.  Running Goodrich ATs on it, and currently some Chinese mud-tires that came on the trailer.

Have been considering Goodrich Endurance STs, but they only come in a 225 X 75 X 15 (trailer takes 15"), whereas current Chinese tires are 235, and I don't want to lose any height.  On the other hand, my feeling is that the straighter the tread, the better the mileage,  and it's a long way from N.C. to Utah. 

What do you think about the relative strength of sidewalls in a compromise like the Goodyear Wrangler?
All tires in the sizes we're using on trailers are going to be C-rated, I believe.
Title: Re: Eight Days in Southern Utah
Post by: LivinLite AZ on October 13, 2017, 03:22:00 AM

Thanks for the reply.   Yes, airing down is at least a possibility in our future, though I don't have any experience off-roading---we do want to get out into the deserts of the SW.  Towing with a 2500 series Ram Tradesman 4WD, which looks lifted, but they tell me it's stock.  Good clearance, anyway.  Running Goodrich ATs on it, and currently some Chinese mud-tires that came on the trailer.

Have been considering Goodrich Endurance STs, but they only come in a 225 X 75 X 15 (trailer takes 15"), whereas current Chinese tires are 235, and I don't want to lose any height.  On the other hand, my feeling is that the straighter the tread, the better the mileage,  and it's a long way from N.C. to Utah. 

What do you think about the relative strength of sidewalls in a compromise like the Goodyear Wrangler?
All tires in the sizes we're using on trailers are going to be C-rated, I believe.

I am not a fan of Goodyear Wranglers (I had 2 blowouts on two different sets). We have BFG KOs on our CL 13QBB, and have gone through several sets on our Jeep. There's a lot to like about the KOs, but on the Jeep they do tend to wear quickly (in fairness, I do regularly run them as low as 15psi on 4x4 trails around Sedona, and don't always air back up around town).

I've heard really good things about Falken Wild Peaks lately from other experienced off roaders (compared with the KOs they are equally capable off road, really good teadwear, better on snow and ice, quieter and cheaper. I'm going to try them next.

Regarding tire sizing, the middle "75" number correlates to tire height (aspect ratio). The higher this number, the more sidewall height will be, and therefore more true lift. The first number "225" id related to the width of the tread (section width). I did come across a 14" tire that is at the top of my list when the BFGs on our 13QBB wear out here : https://www.tirerack.com/tires/tires.jsp?tireMake=General&tireModel=Grabber+AT+2&partnum=785QR4GRAT2OWL&vehicleSearch=false&fromCompare1=yes

... but they have almost the same tread pattern as the BFG KOs. They make them in 15" too. The wheel wells on our 13 are pretty dinky and our tires are a moderate 26" diameter overall. 28" max is what I could fit without rubbing unless I go into mod mode. In which case I'd like to accommodate some 31x10.5x15"s for the CL. But hacking into my virgin wheel wells is off the table for now.

Let me know if you head out west. I could make some recommendations for some must see places.

: ) S
Title: Re: Eight Days in Southern Utah
Post by: nolichuckyjake on October 13, 2017, 09:02:36 AM

[/quote]
Regarding tire sizing, the middle "75" number correlates to tire height (aspect ratio). The higher this number, the more sidewall height will be, and therefore more true lift. The first number "225" id related to the width of the tread (section width).
[/quote]

Yeah, metric tire sizing is complicated, and I always have to refer to a chart to remember how it works.
As I understand it, both the first and second numbers are relative to each other, so "235" is not a clean dimension, but relative to the "75".

See: https://tiresize.com/comparison/ (https://tiresize.com/comparison/)

If this is true, there is .6" difference in overall height between a 235 X 75 and a 225 X 75, and that is what my comment was referencing.

Thanks for the info on other tire options.  Gonna run these Chinese tires around the southeast this fall, and replace them before I head cross-country, probably in the spring.   I'll be asking for recommendations for boondocking spots then.   

The first place I see potential problems with clearance on my DBS 16 is the rear jacks, which look like they are just waiting to ground out in a deep wash.    Might need to become 'removable' for some trips.
Title: Re: Eight Days in Southern Utah
Post by: LivinLite AZ on October 13, 2017, 04:34:26 PM

Regarding tire sizing, the middle "75" number correlates to tire height (aspect ratio). The higher this number, the more sidewall height will be, and therefore more true lift. The first number "225" id related to the width of the tread (section width).
[/quote]

Yeah, metric tire sizing is complicated, and I always have to refer to a chart to remember how it works.
As I understand it, both the first and second numbers are relative to each other, so "235" is not a clean dimension, but relative to the "75".


See: https://tiresize.com/comparison/ (https://tiresize.com/comparison/)

If this is true, there is .6" difference in overall height between a 235 X 75 and a 225 X 75, and that is what my comment was referencing.

Thanks for the info on other tire options.  Gonna run these Chinese tires around the southeast this fall, and replace them before I head cross-country, probably in the spring.   I'll be asking for recommendations for boondocking spots then.   

The first place I see potential problems with clearance on my DBS 16 is the rear jacks, which look like they are just waiting to ground out in a deep wash.    Might need to become 'removable' for some trips.
[/quote]

Yes, the middle number is ratio, of tread width / sidewall height. Tire Rack shows the actual tire height for each size (under specs). You will notice that there is a slight height deviation between different tires of the same "size".

S
Title: Re: Eight Days in Southern Utah
Post by: Steve Sanders on December 19, 2017, 12:56:17 PM
In metric tire sizing, the first number (section width) is the width of the tire, in millimeters. This is measured at the widest point of the tire when properly mounted and inflated on a properly sized rim. (Good luck reproducing that measurement!)

The second number is the aspect ratio. Section width times aspect ratio (as a decimal value) yields the sidewall height, in millimeters.

The last number, of course, is the wheel diameter, in inches.

So, in theory, Tire Diameter = (((Section Width X Aspect Ratio) X 2) / 25.4) + Wheel Diameter

Sent from my SM-G950U using Tapatalk

Title: Re: Eight Days in Southern Utah
Post by: LivinLite AZ on December 19, 2017, 01:35:21 PM
Hi Steve.

Thanks for the great clarification on metric tire sizes. Always interesting to see the difference in actual tire dimensions between two different brands of identically sized tires when I look at them in Tire Rack's excellent 'actual dimensions' sizing matrix.

Happy camping!

S