pic: HiGrips after two events

[BrendanB]

I wonder if AndyMark changed the material since last year. Our team used 4in HiGrip 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.

[Gdeaver]

The wheel behind it does not look as bad. Remember you are in a district comp and have at least 24 matches plus eliminations on those wheels. Also, may be you are under estimating just how much you beat those wheels this weekend. After playing at Lenape, I'm surprised that there is any tread at all. Buy some new wheels and get set for a change out Thursday at Mars champs.Hopefully your design allows for a quick wheel swap. The big question is can one set hold up at MAR because I can say it will be more intense than this weekend.

[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.

[BrendanB]

Originally Posted by JamesCH95

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.

Sorry, I should have clarified that we used the 4in HiGrip wheels. My mistake!

[Mike Marandola]

Originally Posted by Gdeaver

The wheel behind it does not look as bad. Remember you are in a district comp and have at least 24 matches plus eliminations on those wheels. Also, may be you are under estimating just how much you beat those wheels this weekend. After playing at Lenape, I'm surprised that there is any tread at all. Buy some new wheels and get set for a change out Thursday at Mars champs.Hopefully your design allows for a quick wheel swap. The big question is can one set hold up at MAR because I can say it will be more intense than this weekend.

We knew they would wear down as fast as they did. The four corner wheels are worn smooth but the two center wheels still have about 0.04" of tread left. It is due to the corner wheels being dragged when we turn.