Did you hapeen to bend an axle? If so, I think that might be something for Whipper to custom machine because its an odd-ball 1 3/16" size. And by the way, I hope that wasnt the problem because if you were able to bend and axle with those 21" tires on it, I can only imagine what would happen with the 26x12x12 Goodyears on my rig.
