In the end, heat is the killer. The RE71Rs wear fast in the heat and when they get too hot. If you can maintain a hot pressure of 34-36 or so "hot", they last much longer! I can go through a set of fronts in 3 days during the summer - no problem. The hot temps crack 40 and there almost isn't anything you can do about it. You just cannot drop the cold temp low enough without triggering a low temp warning, and who wants to drive slow. It is a give an take, put a few hard laps in and back off a lap or two.
The RE71Rs also like to "mild" initial heat cycle. The first session on new RE71Rs should be only a "warm up" session - don't get them hot! Then, let the tires completely cool down before the next session, if you can. Really helps their longevity.
Just attended a 3-day HPDE this past weekend with new RE71Rs on. The temps were cold in the mornings and cool in the afternoon, 50/60 degrees avg. Could maintain a hot temp of 35 on the nose. After three hard days (approx 10 lead-follow instructing sessions with students and 12 or so Open/Time Trial sessions), the tires look great! Easily 65% remaining with great all-around wear.
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BMW CCA and PCA HPDE Instructor
Former BMW CCA National Capital Chapter HPDE program Chairman 2021-2022
Last edited by M2joey; 10-20-2020 at 10:31 AM..
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