Originally Posted by
Haagenize
Can you explain this further? Also I got a friend that says any material should be able at least 2mm of flex
I would think so, but I would also think that if you jamb a wheel in there, you're placing a constant load on the joints at the brake bridge and limiting the amount of flex available to absorb an impact before damage occurs. Maybe it's not a big deal but I would do something different.