[MrBasse]

The only issue with an 8" wheel compared to a 10" wheel is the extra force needed to climb the obstacle. An 8" wheel means you are hitting the barrier with the wheel climbing vertically due to the center of the wheel being at or slightly below the barrier's total height. The modifications necessary to make a 10" $4 wheel work took us the better part of one afternoon to complete and with a little help from local welders we can have a very simple and cheap means of handling anything that the field can throw at us.

Also, our team has a very limited budget, as I'm sure others do as well. Spending $15 per wheel is much easier to swallow with a little work than spending $60+ for one that is just a bolt on. When you look at six wheels, we save $270... that's more than we spent on all of the parts we put on our rookie year robot...