usctrojanGT3

So I was wondering, which cheater tire is better to run on the GT cars the Hoosier A7 or the Hoosier R7? I've only run the R7s before and never tried running the A7s. What's the difference between the two tires in terms of grip and fall off of grip with HCs? Curious to hear from you guys...

DOUGLAP1

The "A" stands for Autocross. and the "R" stands for race. So, as you can probably imagine the A7 will come up to optimum temperature quickly, and overheat with continued use on a race track.

I have used the "A" compound at Barber when is was rather cool (under 40 F), and they did fine, but were still overheating after about 10 laps. I hear that some time trials people will use them in warm ambient conditions like qualifying tires for 2 or 3 laps, but anything more than that and they are toast.

For DE use, I would just get some NT-01's or RE-71R's that aren't going to heat cycle out like R7's.

Thundermoose

For DE , R7's. A7's are for time trials or autocross trophies.

Kevin Fennell

Or if your car weighs 1940 lbs with you in it.....

ProCoach

^^This^^

I can count on two hands how many drivers I know (out of tens of thousands) who could truly leverage the difference on a consistent basis...

Raucky

R7 and don't give it a second thought.

Steve113

Raced on A7's they held up no issues in 25-45 min races . A7 come up to temp very fast and stay very stable. If you aren't looking for the last tenths and you want the tire to last longer for lots of De's then go R7

analogmike

The problem I have with A7 is the pickup - they gather so much rubber on the cool-down lap that they are almost worth trashing. They also pick it up during racing on a primarily one-way track, and can get thick bands of rubber on them. Not fun scraping them between runs, reminds me why I quit autocrossing.

mark kibort

yes, on all counts..... most all the SCCA runoff competitors were on A7s if they were on hoosiers ….no issues, greater than any other tire we all use. However, they will last a tad less long compared to the R7

mark kibort

maybe it was the guys you were on track with... any hot tire will pick up a LOT of loose rubber especially if you drive over it when the tire is 200F on the surface!

wanna911

I cant see any reason to run A's at a DE unless you are shooting for a personal best or compete on them and thus want to test on them.

That being said, A's will last in cooler weather on lower wear tracks with smooth driving. Tracks with old gritty surfaces chew them up quick. Hot Temps are also a no no. Traffic does help prolong tire life.

Cory M

+1

85Gold

[QUOTE=DOUGLAP1


For DE use, I would just get some NT-01's or RE-71R's that aren't going to heat cycle out like R7's.[/QUOTE]

But you can’t win your DE on lesser tires.

Peter

dnitake

Get the A's. And on the cool off, drive into the clag. That way, you get all the R7 cast off FOREVER haha.