RA1 Tread Depth
#2
GT3 player par excellence
Lifetime Rennlist
Member
Lifetime Rennlist
Member
shave to 5/32 to reduce wiggle
shave to 3/32 to race
shave to 3/32 to race
#3
Rennlist Member
Or split the difference & run 4/32 all the time. That's how I roll.
Professional Racing and Driving Coach
Professional Racing and Driving Coach
#5
I race Spec Miata, where the RA-1 is the spec tire. For us, these tires are not capable of running at the front until they're nearly slicks, & they're the fastest right before they cord. Because of this, we're finding that the more shaving the better - for racing.
Its a simple trade off between cost and speed. Shave according to your priority.
Its a simple trade off between cost and speed. Shave according to your priority.
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#8
Rennlist Member
I just had a set shaved 3/32nds, corded them in 18hc, I'll never go below 4/32nds I think your throwing away rubber at that point, if you are doing DEs I wouldn't even bother, run them full tread, little squirm but they will last forever...
#9
Rennlist
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15/128s allows them to break-in faster.
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Larry Herman
2016 Ford Transit Connect Titanium LWB
2018 Tesla Model 3 - Electricity can be fun!
Retired Club Racer & National PCA Instructor
Past Flames:
1994 RS America Club Racer
2004 GT3 Track Car
1984 911 Carrera Club Racer
1974 914/4 2.0 Track Car
CLICK HERE to see some of my ancient racing videos.
Larry Herman
2016 Ford Transit Connect Titanium LWB
2018 Tesla Model 3 - Electricity can be fun!
Retired Club Racer & National PCA Instructor
Past Flames:
1994 RS America Club Racer
2004 GT3 Track Car
1984 911 Carrera Club Racer
1974 914/4 2.0 Track Car
CLICK HERE to see some of my ancient racing videos.
#12
Moderator
Rennlist Member
Rennlist Member
The one time I tried RA1s unshaved two years ago they were terrible. That tall tread block wandered. It took about 3 DEs to wear them down to the point I was happy with them.
#14
Race Director
I shave my RA1's to 5/32 for DE...they are perfect
#15
I vote no shave. You're in a light car that's easy on tires. Why not try to get max life out of them? As pointed out, if you don't have rains then you'll be real happy you didn't shave them. Do you trailer the car? If not then definitely no shave.