Like someone else already said. You have the suspension hanging, put the stands under the axle housing or put the car on the ground. Someone asked about the same non existent size ( 275/70- 15) a few months ago...
The answer is still the same, they don't make a passenger tire in that size. Period. Never will. The only way to get a taller tire that is just as wide is to go with racing tires. or truck tires. same answers.
They come in different sizing, like truck tires. 30" X 10". -15 or similar.
Or you have to narrow the rear, widen the tubs and then you are not limited on height.
Tire sizing is a formula.
It breaks down to 275 ( Section width in mm.) / 60 or 70 or whatever ( Aspect ratio % of tire height to section width) and the the rim diameter. So a 70 series tire is 70 % as tall as it is wide ( section width, not tread) and so on. The lower the series, the lower the tire height.
Or just lower the rear of the car.
Just remember what size tires were available when these cars were new... Talk about not filling up the fender wells.
IS this what you were refereeing to? ////
OK, lets get a tire/tyre size combos thread started. Too many wasted threads about one topic.
Chryco if you or Ross or someone could sticky this topic that would be good.
Post what rear end you have, tire size, wheel size + back spacing etc
Also any mods or relocation kits that were needed to fit your wheel combo along with photos, definitely PHOTOS.
I'll go first:
1970 Dodge Challenger R/T
8-3/4 SureGrip
15x8" Rallyes Rear with 275/60 BFGoodrich Radial T/As
15x7" Rallyes Front with 245/60 BFGoodrich Radial T/As
Chrysler Rallye wheels: 56 Series purchased from
www.jegs.com All wheels have a 4-1/2" (4.5) Back Spacing.
Rear trim rings leave a 1" gap due to the wheel being 8" and repro/OEM rings only available in 7" sizing.
No rubbing, no relocation kits, no worries.
Cheers,
NZ440R/T
Panther Pinks Combo:
295/50 R -15 with little clearance to the leaf spring. Fits inside the wheel wells though. Re: E-Body Tire Combos
« Reply #2 on: March 31, 2006 - 06:56:30 AM »1972 Dodge Challenger
Centerline Autodrags rims and BFG T/A Radial tires.
The fronts are 15x7's with 3-5/16" bs on 225/60/15's
The rears are 15x8.5's with 4-7/8" bs on 295/50/15's
******NOTE: This is on a stock E body width 8 3/4 rearend, I HAD to use a 7/16" Mr.Gasket wheel spacers to give the tires at least 1/2" clearance from tire bulge to leafspring, because all it had was 1/16" to 3/16" clearance without them. I also installed 3" long ARP wheel studs and open end lug nuts in the back, so I'd have plenty of threads for the spacers*****
***So if you like this look and want to use a 8.5 wide rim just find a rim with a 4 1/2" backspace and you won't need any spacers! Yet it will look the same.
It just barely touches the drivers side when I hit a big bump, but I'm still using stock shocks with re-arched leafsprings. If I added KYB shocks or rolled the inner lip a little or trimmed it wouldn't hit.
I have 275-60-15 MT drag Radials on 8 in ralleys now.. but i had MT 12.5 x 28 Street ETs on the same wheels on it before. Just had to use a half inch spacer Just put on new tires. Car is a 71 cuda--stock 8 3/4 rear with new espo 1" over stock height springs. To fit 275/60-15 tires I had to buy new 15x8 ralleye rims(from wheels vintique) 4.5" backspace. Front tires are 235/60-15 on stock 15x7 ralleyes. Here's my info for the 14" crowd:
1972 Challenger Rallye
Stock suspension, 8 3/4" rear end
Factory Mopar 14"x6" Styled Road wheels (Magnum 500 style)
Fronts: 215/70R-14
Rears: 225/70R-14 (a little taller and wider)
For the 14"x6" rim, from what I saw, the widest tire you can "safely" mount is a 225/70R-14 or a 235/60R-14 tire.
There's also a pic comparing the 2 sizes.
Take the tire size of the new and old to convert to OD diameter of tire. Google a conversion chart to do. Even though wheel size new is larger the tires are low profile. Disc brake size is why new cars use big wheels mainly along with looks. You might get away with the 18 inch new wheel and a low profile tire if off set is close. My 245/45 20inch Goodyears are 28.7 inch dia. Look up your old tire dia. It will be pretty close. 15" wheel with a bunch more side wall. A 205/75 15x7" Tire and wheel will fit 1971 stock Hemi Challenger front end. That tire is 27.1 inch dia, so on my 20 inch at 28.7 dia your about 7/8"x2 differance. Stock 18" Challenger 2009 tire is 235/55 18 at 28.1 dia. Now your at 1/2"x2 dia differance. Look up some lower profile 18 inch. That web site below will provide OEM tire size that far back. Its where I got info. Your turning clearance will be the issue I think if lug pattern is the same along with offset. With 18 inch wheels you can put larger brakes on the front also. Good thing. According to Tire Rack a stock 1970 318 Challenger did come with 14 inch wheels. Good luck.
