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Is the BFG R1S a Hoosier R7 or A7 Alternative

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Is the BFG R1S a Hoosier R7 or A7 Alternative

 
Old 02-06-2019, 08:35 AM
  #11  
 
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Originally Posted by DavidNJ View Post
Two questions:

1) How long a race were the A7 and R1S used for? I would have thought a 30-minute w2w race was long for an A7.

2) The 8" rim would probably have been narrow for the R1S. Several reports are they like a wide rim because of construction and tread. 8" is the smallest specified for that tire and I imagine 9"-9.5" would have worked better. I wonder if the 225/45 would have worked better on that rim. I think Samed has tried both with the Hoosier R7s.
1) I used in 25, 30, and 40min races. The 40min race didn't stay green so was effectively a 25min race. On a light enough car, the A7 is fine in low temps. On a 90deg+ day it will struggle. My car+me = 2600lbs.

2) I heard the same. Only tried the R1S once because I hated the feedback. Planning to try 225/45-17 A7s later this year (although they are significantly taller than the 245/40).
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Old 02-06-2019, 05:47 PM
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Originally Posted by cracknut View Post
1) I used in 25, 30, and 40min races. The 40min race didn't stay green so was effectively a 25min race. On a light enough car, the A7 is fine in low temps. On a 90deg+ day it will struggle. My car+me = 2600lbs.

2) I heard the same. Only tried the R1S once because I hated the feedback. Planning to try 225/45-17 A7s later this year (although they are significantly taller than the 245/40).

Why not try the 225/40-17 which is lower? It is still in the recommended range, but with 9" tread and the shorter sidewalls be closer to being overtired on an 8" wide wheel.
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Old 02-07-2019, 04:46 AM
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Originally Posted by DavidNJ View Post
Why not try the 225/40-17 which is lower? It is still in the recommended range, but with 9" tread and the shorter sidewalls be closer to being overtired on an 8" wide wheel.
Thought about it but need to check gearing at Thunderhill, Sonoma, and Laguna first. Also, I run 255/40-17 at track days (not race weekends) and would prefer to keep the diameters as close as possible.
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