Tire size for 71 Riviera

[crazyjackcsa]

Hi all,

It looks like it may be time to get a new set of tires for the Riv, spinning a peg leg has that effect, I was wondering wha the largest tire is that I can fit on it without any problems with rubbing. I'd like to get the widest as well as the tallest I can, anybody know?

[Smartin]

Using stock rims?

[crazyjackcsa]

of course, and I don't want to alter the back spacing either,

[GoldBoattail455]

You'll be able to put HUGE tires in the rear. Not sure about the front or size. Mine are P225 215 R15 all the way around.

[Smartin]

even with 7" rims, you might be able to get a 9" tire on there...

hmm...a question for the gurus!!

[Bad Boattail]

You can go with 245/65/15 on the 7J rims, or find Road Wheels from an Estate Wagon that are 8J, and go for 275/60/15 at the rear and 255/60/15 up front.

[crazyjackcsa]

I've got 225/75/15 on there right now, they fill up the wheel well alright, I think they are a little taller than the 245/75's you know what they say, bigger is better (at least I like the look better)

[Bad Boattail]

crazyjackcsa said:I've got 225/75/15 on there right now, they fill up the wheel well alright, I think they are a little taller than the 245/75's you know what they say, bigger is better (at least I like the look better)

225/75 means that the height of the tire wall is 75% of 225 mm.
So that's 168.7 mm.

245/75 (I don't think this size exists, I spoke about 245/65, but let's work out your 245/75 just for an example...) are 190.5 mm.

Total wheel height

with 225/75/15 = 168.7 mm + 168.7 mm + 381 mm (that's 15 inch in mm) = 718.4 mm = 28.3 inches

245/75/15 = 190.5 mm + 190.5 mm + 381 mm = 762 mm = 30.02 inches

And 245/65/15 = 159.2 mm + 159.2 mm + 381 mm = 699.4 mm = 27.55 inches

[crazyjackcsa]

hee hee, typed faster than i was thinking. I did mean the 245/65, just got my numbers backwards.

so let's see that would mean that 245/65 would are slightly smaller around than the 225/75 I have right now.

[bigdawg5565]

I gotta question. Can I run P245/60-15's all around on my 73 Riv while using an aftermarket rim with the same 5 inch backspacing as on the rally's?