Q&A about my jeeps tires |
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Millennium falcon
Member Joined: 20 Sep. 2016 Location: Central PA Status: Offline Points: 1521 |
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Posted: 05 Feb. 2019 at 9:27pm |
Ive had a few questions asked about my tires lately so here they are.... They are cooper stt pro radials.
The size is 215/85-16. They are load range E. They are on 16x5.5" wheels. I am running 1" spacers (to clear my rotors) They measure about 30" tall and about 7" wide. I run them at 15-19 psi. I am tubeless and have had zero issues with them. Ive run them in snow/rain/mud, so far I am very pleased. I have put about 1700 miles on them since last spring. |
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Cj3bmutt
Member Joined: 02 July 2017 Location: Tecumseh,Ks Status: Offline Points: 125 |
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I put the same tires on my 3B this winter. I installed them on 16X7 rims. I like the way they look and ride. Can’t wait until this spring to get them out and see how they do on the trails.
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Lee MN
Member Joined: 13 Aug. 2008 Location: Harris, MN Status: Online Points: 4923 |
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Thank you Sir!, I’ve been thinking different wheel/tire combo on DadsJeep. I’m currently running 235/75/R15 on 15x7 wagon wheels. What I do not like is the width of the package, they fling mud/crap up on the body sides, and airing down in the mountains the steering effort is more than I care for with shoulders & elbows in not so great shape anymore. I have 7.00x15 ndcc’s on my 3B and the steering effort is nothing compared to DadsJeep!. I was considering 7.00x16 ndcc’s but would rather stick to a radial tire for the ride!. Your tire is the same height as a 7.00x16 and I will consider that as well, I’ve had very good luck with Cooper tires also on my daily drivers.
Thank you, Lee |
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LEE
44 GPW-The Perfected Willys 49 2A “If you wait, you only get older” 67 M715 American Made Rolling History |
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oldtime
Member Joined: 12 Sep. 2009 Location: Missouri Status: Online Points: 4139 |
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I really can't understand why no one makes the 215/ 85R /16" in 6 ply rating.
Those Coopers look to a great tread design for M&S use on trail and street but not so great as a 10 ply trailer tire. In my previous searches I was amazed to find but one single mfg. for the 235 /85R/16" in 6 ply. The Pirelli Mud Scorpion 235 85 16. This is my present collection of tires:
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Currently building my final F-134 powered 3B .
T98-A Rock Crawler using exclusive factory parts and Approved Special Equipment from the Willys Motors era (1953-1963) Zero aftermarket parts |
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cjs cj
Member Joined: 11 Oct. 2016 Location: Florida Status: Offline Points: 157 |
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You mentioned that you run them tubeless and at 15-19psi, what is the recommended tire pressure stamped on the tire? I ask because the tires I run are load range D and suggest like 60psi. I am running at about 30 because I am not sure what will happen if I go lower.
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Cjs Cj
1948 CJ2A |
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Millennium falcon
Member Joined: 20 Sep. 2016 Location: Central PA Status: Offline Points: 1521 |
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I run that low pressure because they are a stiffer tire. Load range e. You can pull the valve core and it won’t evem look flat. This lower pressure makes it ride better and passes the contact patch chalk test. With The skinny rims I don’t worry about popping a bead or anything. I will have to look at the recommended pressure I’m guessing it’s 45 or so.
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Nothing Special
Member Joined: 02 Feb. 2018 Location: Roseville, MN Status: Offline Points: 842 |
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Load range E tires have 80 psi max inflation pressure. That's what's on the sidewall, but it's not the "recommended" pressure, it's the max pressure, used for the max load carrying. Which for that tire is probably more than the weight of a Jeep. On one tire.
I had load range E BFG Mud-Terrains (the old ones,before the KM) in LT235/85R16 on a '75 CJ5. I thought those were pretty good tires for that vehicle until I got load range C tires. So much better ride with the Cs. I like the width/dia of a lot of tires that only come in load range E. But I don't want that heavy / stiff a tire on a lightweight vehicle. (Emphasize "I don't want...", your mileage may vary)
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Bufordjeep
Member Joined: 12 Aug. 2009 Location: Illinois Status: Offline Points: 506 |
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Who makes the tire in the center classic looking mud & snow tire? Thanks...
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nivrat
Member Joined: 27 May 2014 Location: Glendale, AZ. Status: Offline Points: 195 |
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FWIW, I just put these on my 46 project...
7.50x16 Deestone D503's. They're on 4.5" wide rims, and are just a hair under 32" Mike |
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nivrat
Member Joined: 27 May 2014 Location: Glendale, AZ. Status: Offline Points: 195 |
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Sheesh pics didn't show lemme try again...
Mike |
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nivrat
Member Joined: 27 May 2014 Location: Glendale, AZ. Status: Offline Points: 195 |
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7.50x16 Deestone D503's just under 32" tall.
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Bufordjeep
Member Joined: 12 Aug. 2009 Location: Illinois Status: Offline Points: 506 |
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Thank you
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oldtime
Member Joined: 12 Sep. 2009 Location: Missouri Status: Online Points: 4139 |
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Left to right...... STA 6.50 x 16" Super Traxion 6 ply rating (tube type) section width of 7.2 and a tread width of 6-1/4" > 30" diameter uninflated STA 7.50 x 16" Super Traxion 8 ply rating (tubeless) section width of 8.7 and a tread width of 7" > 31" diameter uninflated. Pirelli 235/85R/16" Mud Scorpion 6 ply rating (radial) section width of 9.3" and a tread width of 7-1/4" > 31-1/4" uninflated. The Pirelli's are the only 215 / 235 section width 85 aspect ratio radial tires I have ever found with a 6 ply rating. All other 215/235 width radials are made with 10 ply because these narrow tires are most often intended for trailer applications. I really like the tread and also the way those Coopers are siped for better grip and wear but I consider the 10 ply rating no good for the off road flex. 10 ply tires mounted on a Jeep means you to inflate it to abnormal low pressure just to get a full contact pattern on hard ground. Besides NDT's and NDCC's These are the skinniest tires that I could find which are anywhere close to 31" tall and 6 ply rated for on/off road use. Each has its drawback. The 6.50 Super Traxion is only 30" tall inflated. The 7.50 Super Traxion is available only with 8 plies. Mine are tubeless design but they are also made as 8 ply tube type. The Mud Scorpions are a tad wider than I prefer and have no siping. But they do have a decent 2 stage lug design. Edited by oldtime - 06 Feb. 2019 at 4:24pm |
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Currently building my final F-134 powered 3B .
T98-A Rock Crawler using exclusive factory parts and Approved Special Equipment from the Willys Motors era (1953-1963) Zero aftermarket parts |
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Charles
Member Joined: 07 Jan. 2012 Location: Minot ND Status: Offline Points: 81 |
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Im running the middle tire on my 46. I mounted them on Keystone 15 x 7 wagon wheel spoke rims. I like them however I have not tried them on trails yet will let you know.
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Charlie
46 CJ2A 26063 46 CJ2A 19760 |
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Nothing Special
Member Joined: 02 Feb. 2018 Location: Roseville, MN Status: Offline Points: 842 |
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In addition to the 215/235 ST trailer tires, LT235/85R16 was the standard size for single wheel 3/4 and 1 ton trucks for a long time and there's an LT215 that was standard on duallies (narrower to prevent the sidewalls from rubbing each other). But again load range E is a good choice for those applications. And for what it's worth, very few tires these days are made with the number of plies in their rating. Load range E tires are "10 ply rated" but most only have 2 or 3 plies in the sidewall and maybe 5 or 6 in the tread. But they're still stiff and heavy, so actual number of plies really isn't as significant as the load range. But a lot of people still call load range E 10 ply, D 8 ply, C 6 ply, B 4 ply, A 2 ply.
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Millennium falcon
Member Joined: 20 Sep. 2016 Location: Central PA Status: Offline Points: 1521 |
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Like "nothing special" said the tires are not 10ply... I looked today they are 6 and 3. All this talk had me curious... So I made an experiment video for you....and me... haha!
Edited by Millennium falcon - 06 Feb. 2019 at 8:03pm |
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Nothing Special
Member Joined: 02 Feb. 2018 Location: Roseville, MN Status: Offline Points: 842 |
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... but as you note in your video, they're still load range E, which is "10 ply rated". So for people that want a "6 ply" tire, these ain't that.
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Millennium falcon
Member Joined: 20 Sep. 2016 Location: Central PA Status: Offline Points: 1521 |
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I don’t think any of us are arguing with you on that.
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