Timinsk

iTrader: (9)

I'm in need of some really good radial tires. I was thinking BF Goodrich or GoodYear; can't decide. Anyone throw me some links of what to buy? I have the 15x7 rs rims i believe

84Z28406

Radial as in normal street tires, or as in Drag Radials? If you're looking for normal tires, I'm partial to the BF Goodrich Radial T/As. Had a set of 215s on my 15 inch rims. Getting 255s this summer.

skiroulertx447

I've got Radial T/A's on the 15x7 Z28 rims, the tires are 235's. They seem to be a good tire, but I want to get some wider tires on the back.

84Z28406

According to the BFG website, a 7 inch wide 15 inch diameter wheel will accept up to a 255/60R15 or 255/70R15 for radial T/As. They're about the widest all season tire you can get per rim size, though I'm sure each brand has their own.

Timinsk

iTrader: (9)

Where would it tell me it would fit my rs rims? I have an 89 rs with the rs rims, nice big black thick strip on each spoke. Mine are from what told 15x7 or so. BF website keeps telling me they dont have anything for me.. I want radial street. Any direct links to what I should get? I want the most grip for the street, this car is only being used through good summer days, not winter or anything. I'm going to be going to track here and there.

84Z28406

http://www.bfgoodrichtires.com/specs/radial-t-a/12.html

Thats the data for radial T/As. I'm sure a traction T/A or any of the g-force series would provide better grip at a certain width, but the radial T/As are the widest you'll get on skinny rims.

wanab03ss

iTrader: (20)

Ive been told by everyone I know who has first hand knowledge that the MT radial will out perform BFG. That coming from 9 different people. Its a great working and looking tire

84 z28

Are you looking for a full set or just the rears ?

wanab03ss

iTrader: (20)

Heres a pic of the MT DR on an 8 " rim but I believe there 255s...... sorry I know its a Mustang......

Damon

Back in the old days there was a rule of thum that said the wheel should be greater than 70% as wide as the tire, and preferrably over 75%. (This was, however, before the days of ultra low profile "steamroller" tires with aspect ratios under 50-series, so take it with a grain of salt.)

This is an important consideration to ensure that the entire width of the tread contacts the ground properly (maximizing traction), not "bowing out" in the middle and riding mostly on the center few inches of the tread. It IS POSSIBLE that a too-wide tire on your rim can REDUCE traction vs. an appropriately matched size.

Anywho...... here's the numbers:

To convert mm (how tires are measured) to inches (how rims are measured) you first need to divide by 24.3. So it goes like this:

235 60R15 tire is 235mm wide at it's widest point (not at the tread)
235mm / 24.3 = 9.67"
7"(wheel width) / 9.67" (tire width) = .72 (72%. Above the old 70% "rule of thumb," and so acceptable)

Now do a 255mm wide tire and compare the results.....

255 / 24.3 = 10.49"
7" (wheel width) / 10.49" (tire width) = .67 (67%. Below the 70% "rule of thumb," and so not acceptable)

Probably explains why you don't often see a 255 tire on a 7" wheel from the factory very much. Not that there aren't a few exceptions. Like my 1990 454SS truck that came from the factory with 7" wheels wearing 275 60R15 tires! That's the most extreme example I know of that breaks this rule. The vast majority of factory wheel/tire combos conform to it, however. Even today.

84Z28406

Of course an MT drag radial will beat the hell out of a radial T/A. The redial T/A is an all season and the the MT is a summer only drag tire approved by DOT. I only recommended the radial assuming he didn't want drag radials. If he does, then by all means get the better performing MTs.

wanab03ss

iTrader: (20)

he said hes only driving in the summer and wants a tire for the track....Im comparing the et drag radial vs bfg drag radial.

Timinsk

iTrader: (9)

Hm i'll keep it in mind, so you want to atleast have 70% or more then correct? or just closest to 70%

a full set