these are very thinned side walled for sure as my wife found out. she barely rubbed on a stump and sure enough she tore a hole in the side wall and screwed the day. time to slim the tire and hope for the best. i might add we've used this (way to often) 6 times w/ very good results. i highly recommend this product.

 

6 ply bias are the only way to go in the northeast woods. i have 1,500 miles on my 27" itp 589's and have never put a scratch in one, and they ride fine on hardpack. I have ridden with 50+ people who come to the area where i live and have seen so many flats on radials, especially oem honda rincon tires, that i would never buy them. Sidewalls on radials are very easily damaged.

 

well my 6 ply xtr radials are pretty good and very rugged.

 

ITP tires are excellent, the xtr's are very sweet tires. Bias ply have stiffer sidewalls and can handle sideways deflection-like hitting a sharp rock with the wheel turned-better than radials.