vaquaro Posted April 12, 2013 Share Posted April 12, 2013 30 x 9.5 x 15 will these clear at stock ride hieght ? Currently using 235/75 r15 with no issues . Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted April 12, 2013 Share Posted April 12, 2013 http://www.dakota-truck.net/tirecalc/tirecalc.html A 30 x 9.5 x 15 is equivalent to a 241/79R15 (I know this tire size doesn't exist). I'd say you'd probably rub the flares, especially under load or at full turns. Consider some 1-1.5 inch spacers and shackles and you should be good. Link to comment Share on other sites More sharing options...
mvusse Posted April 12, 2013 Share Posted April 12, 2013 It should clear, with minor rubbing on the lower control arms during full lock steering. Link to comment Share on other sites More sharing options...
Pete M Posted April 12, 2013 Share Posted April 12, 2013 what rubbing occurs will depend on the exact tire you have (they vary in size) and which rims you have. some guys have had minor rubbing, but I had no contact at all with 30" BFG ATs and the stock aluminum rims (15x7) Link to comment Share on other sites More sharing options...
vaquaro Posted April 12, 2013 Author Share Posted April 12, 2013 The tires are Michelin LTX M&S . Bought them on CL for $80 with 70% tread ( used on on a Wrangler ) . Plan to mount them on stock Jeep alloys (15x7 ) . Considering new or upgraded front springs as I'm sure after 23 years there's bound to be a sagging factor . .......Hey Pete , your photo must go back a few years ? .....I think this may give me the inspiration to attend to getting the front suspention up to par ( long over-due ) :cheers: Link to comment Share on other sites More sharing options...
Pete M Posted April 12, 2013 Share Posted April 12, 2013 that photo is from around 97 when I first bought her. 2wd at the time. Link to comment Share on other sites More sharing options...
Eagle Posted April 12, 2013 Share Posted April 12, 2013 http://www.dakota-truck.net/tirecalc/tirecalc.html A 30 x 9.5 x 15 is equivalent to a 241/79R15 (I know this tire size doesn't exist). I'd say you'd probably rub the flares, especially under load or at full turns. Consider some 1-1.5 inch spacers and shackles and you should be good. A 30x9.50 is almost the same size as a 235/75-15. A 235/75-15 is 28.9" diameter (that's one brand -- call it 29") and 9.3" in cross-section width. A 30x9.50-15 is 29.5" diameter and 9.5" in cross-section width. A 30x9.50 will not touch the flares if run on stock Jeep 15" rims. As commented above, there may (or may not) be slight rubbing of the tire shoulder on the lower control arms. If so -- either shim the steering stop, ir just live with it. A lift will NOT cure this. However, if you use 1-1/2" spacers, then you WILL rub the flares. Link to comment Share on other sites More sharing options...
Exgrayxj Posted April 12, 2013 Share Posted April 12, 2013 :agree: On my xj I have run both Canyons and now Ravines, both are 15x8, with different brands of 30/9.50s, with no problems, and that is with the stock, probably sagged 1989 springs. On the mj I am currently running 265/75/16 Nittos, on 16x7 Icons, MUCH taller than the 215/15 that came new on it, I did adjust the steering stops slightly but am currently at stock height, with only the occasional slight rub, tho to do serious offroading it would need to go up a little in front. The other day I took 2400 lb of busted up concrete to the dump, nooo problemo. Aftermarket wheels with different offset from factory will definitely rub on the flares. Link to comment Share on other sites More sharing options...
onlyinajeep726 Posted April 13, 2013 Share Posted April 13, 2013 http://www.dakota-truck.net/tirecalc/tirecalc.html A 30 x 9.5 x 15 is equivalent to a 241/79R15 (I know this tire size doesn't exist). I'd say you'd probably rub the flares, especially under load or at full turns. Consider some 1-1.5 inch spacers and shackles and you should be good. A 30x9.50 is almost the same size as a 235/75-15. A 235/75-15 is 28.9" diameter (that's one brand -- call it 29") and 9.3" in cross-section width. A 30x9.50-15 is 29.5" diameter and 9.5" in cross-section width. A 30x9.50 will not touch the flares if run on stock Jeep 15" rims. As commented above, there may (or may not) be slight rubbing of the tire shoulder on the lower control arms. If so -- either shim the steering stop, ir just live with it. A lift will NOT cure this. However, if you use 1-1/2" spacers, then you WILL rub the flares. I should have specified coil spacers, not wheel spacers. I was not aware of the control arm rubbing issues. Link to comment Share on other sites More sharing options...
Dedaw Posted April 13, 2013 Share Posted April 13, 2013 I clear 31s no problem :thumbsup: ....and then I saw you're 2WD. So that might be a little more difficult Link to comment Share on other sites More sharing options...
vaquaro Posted April 13, 2013 Author Share Posted April 13, 2013 Hey guys , you always come through with great info :cheers: I'm going to go ahead with the Michelins on stock Jeep alloys for now , as I've already adjusted the steering stops previously when I went to the Nokian 235/75 r15 's about 5 years ago . The front suspension project can wait a while ( that sigh you heard , was my wallet flinching every time I mention "project" ) .Most of my driving is commuting 'bout 80 km ( 50 miles) a day and 3-4 trips up country to the B.C. cariboo ( mountain ranch country ) on Forestry roads which are challenging but hardly hard -core off roading . The old girl has served me well for a lot of years ......she's a keeper and I'm a Jeeper . :D Link to comment Share on other sites More sharing options...
AeroNautical Posted April 14, 2013 Share Posted April 14, 2013 that photo is from around 97 when I first bought her. 2wd at the time. I remember reading in a book somewhere about your build. I can't believe that's what it once looked like. I didn't even know what the hell a Comanche was outside of Piper before my brother showed me that. My brother and your build gave me inspiration and look where I am now: a 25 year old truck in my driveway and no money, haha. Best investment of my life. Link to comment Share on other sites More sharing options...
Pete M Posted April 14, 2013 Share Posted April 14, 2013 glad I could help spread the disease. :D I caught it from a guy named Rob Bryce and his Black and Tan build. you should have seen her when I bought her. sporting tiny 195 size tires, a hideous aluminum cap and those awful gold stripes running down her sides. fast as the dickens though. :D don't have any pre-mods photos of her unfortunately. you're referring to The XJ Builders Guide. :D I still find it hard to believe my baby's in a book! :eek: Link to comment Share on other sites More sharing options...
AeroNautical Posted April 14, 2013 Share Posted April 14, 2013 glad I could help spread the disease. :D I caught it from a guy named Rob Bryce and his Black and Tan build. you should have seen her when I bought her. sporting tiny 195 size tires, a hideous aluminum cap and those awful gold stripes running down her sides. fast as the dickens though. :D don't have any pre-mods photos of her unfortunately. you're referring to The XJ Builders Guide. :D I still find it hard to believe my baby's in a book! :eek: Yep, that's it. My brothers got a modded XJ, I don't have any pictures of it unfortunately. Your comanche in that book is the highlight. You flip through the pages of XJs and WHAM. What the hell... is that an XJ with a bed? I want me one of them! haha. I've had several people come up to me and ask what the MJ was, and if I modded an XJ with a pickup bed. Link to comment Share on other sites More sharing options...
vaquaro Posted April 20, 2013 Author Share Posted April 20, 2013 30's are on ! All's good , much more comfortable & quiet too :thumbsup: Now to replace the speedo gear ( there's got to be a link to get the correct size ) to get a true reading :???: Link to comment Share on other sites More sharing options...
AeroNautical Posted April 21, 2013 Share Posted April 21, 2013 Here's a good start: http://www.transmissioncenter.net/speedometer_calibration_______va.htm?gclid=CMHQv8KD27YCFeo7OgodsQsAIQ It lists axle ratios and tire sizes, gets pretty in depth. I have 30 inch tires as well, but I just compensate on the speedometer. when it reads 45, it's really 51. When it's 55, it's really 62. 35 is about 38, the lower the speed, the closer to accuracy the speedometer is. Link to comment Share on other sites More sharing options...
1tonMJ Posted May 30, 2013 Share Posted May 30, 2013 Here's a good start: http://www.transmissioncenter.net/speedometer_calibration_______va.htm?gclid=CMHQv8KD27YCFeo7OgodsQsAIQ It lists axle ratios and tire sizes, gets pretty in depth. I have 30 inch tires as well, but I just compensate on the speedometer. when it reads 45, it's really 51. When it's 55, it's really 62. 35 is about 38, the lower the speed, the closer to accuracy the speedometer is. WHOOPS so I have been speeding like crazy for 2 years. I always do exactly 35, 45, 55, means I am ALWAYS speeding. Havent got a ticket for that yet though. Link to comment Share on other sites More sharing options...
ajohnson928 Posted May 31, 2013 Share Posted May 31, 2013 I bought my MJ with BF Goodrich All-Terrain 30's on it. I haven't had any rubbing issues. Good info on the speedo conversion link. I knew it felt like I was going faster than it was reading but didn't know what the factory tire size was. Link to comment Share on other sites More sharing options...
jimoshel Posted May 31, 2013 Share Posted May 31, 2013 I do so much swapping around that I quit worrying about speedo gear. When ever I change something I just hold it at 60mph and time the distance between the a couple mile markers. Then I just make mental adjustments. Close enough for government work, and radar guns. Link to comment Share on other sites More sharing options...
Eagle Posted June 1, 2013 Share Posted June 1, 2013 30" tires are about 6 percent larger than stock, so whatever the speedometer says -- you're going about 6 percent faster. 31" tires are 11 percent larger than stock, so whatever the speedometer says you're going 11 percent faster. That's if you haven't changed either the speedo drive gear or the axle gears, of course. Link to comment Share on other sites More sharing options...
Knucklehead97 Posted June 1, 2013 Share Posted June 1, 2013 I have 30x9.50r15 courser MTs on my stock height. Doesnt rub at all and gives a nice look to the front. Link to comment Share on other sites More sharing options...
Eagle Posted June 1, 2013 Share Posted June 1, 2013 As I've posted numerous times before, I am running 31x10.50s on factory alloys on my '88 Cherokee at factory height ... and the Cherokee has a smaller rear wheel opening than the MJ. 30s are not a problem. Link to comment Share on other sites More sharing options...
jeepman87 Posted July 8, 2013 Share Posted July 8, 2013 I have 30x9.5s on mine and I have no tubing at all Link to comment Share on other sites More sharing options...
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