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Author Topic:   Tires again
stewaj01
Dirt Roller

Total posts: 13
posted July 06, 2004 05:57 PM  
Our track rules just changed and we can now run 60 series D.O.T. tires with a maximum contact patch of 8 inches and maximum rim width of 8 inches. We have been running the car with 205 70 14 on the front and 225 70 15 on the back (they came with the car). What tire sizes should we run? The car is a 1982 Monte Carlo with a strong running 350 that handles best with no stagger in the rear. The track is a medium banked mile dirt track. Please help.

odb93
Dirt Forum Champ
Total posts: 537
posted July 07, 2004 05:08 AM  
255-60-15

That is what most everyone at my track runs.

stewaj01
Dirt Roller

Total posts: 13
posted July 07, 2004 05:32 AM  
Do they run 255-60-15 on the front and back?

19J
Dirt Freak

Total posts: 370
posted July 07, 2004 11:16 AM  
255 is wider than 8". It is pushing 10". If i remember right.My opinion run whatever tire makes your gear ratio right and makes the car handle good. If your car handles good and you are turning the right rpms you want to turn then leave it alone. Like some say on here dont worry about what other people are running. Run what works for you.

racer17j
Dirt Forum Champ
Total posts: 5390
posted July 07, 2004 10:07 PM  
I AGREE WITH 19 FIND WHAT WORKS FOR YOU NOT WHAT WORKS FOR SOMEONE ELSE, EVERY CAR IS DIFFERENT, THEN DRIVE THE TIRES OFF!!!!!!!

odb93
Dirt Forum Champ
Total posts: 537
posted July 13, 2004 09:01 AM  
For the most part everyone runs the same size all the way around. There are a few that run a different brand on the right rear.(Different compound).

BTW: We are allowed to run weight jacks.

I am not sure how wide the contact patch is on that tire. It is wider than our 8 inch wheel however.

[This message has been edited by odb93 (edited July 13, 2004).]

Deak-Jr
Dirt Forum Racer

Total posts: 81
posted July 14, 2004 09:41 AM  
Heh heh ... we're a tire-mutt.

RF: 255-60-15 Mastercraft
RR: 235-60-15 Cooper
LF: 235-60-15 Firestone
LR: same as LF

We were running a 255 Kelly on the RR and a 245 Firestone on the LR ... weren't turning enough RPM and went to 235s across the back.

We have since found out (i.e., last night) that it was the cam and not the gear (it looked BAD, rounded off terrible, sounded sick, was running hot, etc.).

We were hoping for 6200 and getting 5600 -- with a new cam, we might have to go back to the bigger tires on the back (even though going from a 235 to a 245 street tire isn't exactly a ton of rollout).

Does anyone bother taking their new tires and having some of the tread ground down? And has anyone treated DOT tires, and with what, and how'd it do? C'mon, whose got the juicy secrets ... let's hear 'em.

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