pic: HiGrips after two events

[JamesCH95]

Originally Posted by BrendanB

I wonder if AndyMark changed the material since last year. Our team used 4in kit wheels for hours of practice leading up to IRI and through the end of the off-season. We only replaced our back wheels after a fall in the IRI semi finals where they cracked but the middle wheels were put on in June and have been used a lot since then with no where near this level of wear down. We still use that robot for defense on this year's robot.

Last year's wheels were 6in instead of 4in, so there's 50% more tread to wear away. They were also rated at a slightly lower CoF than this year's wheels, 0.95-1.0 vs 1.1, suggesting that last year's was a softer material. Both are TPU, with the 2013 wheels rated at 77A durometer, the 2014 wheels are not rated on AM's site.