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Re: pic: HiGrips after two events
Quote:
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.
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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.
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