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Topic: Biggest tire? (Read 1400 times) previous topic - next topic

Biggest tire?

Rounded up a pair of 15x8" Weld Pro Star knock offs for the back of the bird.  They have 4.5" backspace.  I'd like to go with a 255 or larger tire.
1988 T-Bird Sport Coupe--5.0 HO, MAF swap, 1-5/8" shorties, BBK/Flowmaster exhaust, Explorer intake, 70mm Edelbrock TB, T5, B&M short throw, Centerforce clutch and PP, disc brake TC rear w/ 3.55's, TC front brakes, '98 Cobra springs, DIY SFC's, other misc .  14.05 @ 98mph with launching too low and shifting too high.
 

Biggest tire?

Reply #1 –
I am told that the largest tire one can fit in the rear, without shortening the axle or installing mini-tubs is 310 on a 18x10.5 wheel, using 40mm backspacing.  I read this on CC, so it is likely to be very accurate.

Biggest tire?

Reply #2 –
Alan, 83-88tbirdguy, the one with the 2 460 birds is running 325/50/15's 6.5 b/s and the wheel fits in the wheel well.

Biggest tire?

Reply #3 –
Back space is more an issue than tire size.  Our wheel wells are pretty large, allowing fitment of 325's with little to no hammering on the wheel wells with proper back spacing (I have 315's on a 10.5" rim with 6.8" backspace).     

A 4.5" back space may push the tire outboard. close to the fender lip, limiting tire size. 

Get out the staight edge and ruler and do some measurements.  It's the only way to tell what fits before you buy!

Biggest tire?

Reply #4 –
Are the wheel wells different between the 83-88 cars?  I always thought that the 83-86 would be the same and 87-88 would be different but I am not sure one way or the other.

Darren

83 351W TKO'd T-Bird on the bottle


93 331 Mustang Coupe - 368 rwhp

Biggest tire?

Reply #5 –
I've got a couple "nearly shot" 275/60's laying around.  Going to mount one Wed and see how it looks.  Wanted 5.5" b/s but could pass on this deal.
1988 T-Bird Sport Coupe--5.0 HO, MAF swap, 1-5/8" shorties, BBK/Flowmaster exhaust, Explorer intake, 70mm Edelbrock TB, T5, B&M short throw, Centerforce clutch and PP, disc brake TC rear w/ 3.55's, TC front brakes, '98 Cobra springs, DIY SFC's, other misc .  14.05 @ 98mph with launching too low and shifting too high.