Quote:
Originally Posted by Silver Ignition
So what do you guys think about a 255/40R17? I know almost everyone runs 245/40R17 but do you think the 10mm of extra width is worth going for?
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My experience testing back-to-back is that the 255's did in fact show the ability to create more grip (peak G's on data logger) but felt sloppier in transitions.
That and I found I had to run higher pressures with the larger tire because of the corresponding wider sidewall - this lead to a bit more unpredictable break away. I'm sure with some practice I could have learned the "feel" of the larger tire. On big courses, the top end gearing advantage holds some value as well as the added grip.
I have always wanted to test a 255/35-18 as I think this could be a great set up especially for nations type courses. Narrow sidewall, wider tread and larger diameter. Based on what I saw at Nats last year I think the 2nd place finisher used that set up. The cost is prohibitive though, and added weight. Tough to find a lightweight set of 18x9 wheels for less than a kidney.