Shock resistant tool steel is the answer

RadiusX combines TorqDrive friction disk technology with our innovative EXP (auto clutch) disk

It's the ultimate Intermediate to hard terrain tire

Manufacturer Part#:CST-564-13-1

Better still

BRP - Rubber Mounted Kit Sub Mount 2016-2018 Husqvarna TC 125 & FC 250/350/450 (901616-26-FCTC) past type tag-Visors / Shields Shock resistant tool steel isThe BRP Rubber Mounted SUB Scotts Under Bar Adapter uses (8) Poly Urethane bushings to isolate vibration and reduce rider fatigue by softening the harsh spike of hitting square edge rocks and obstacles. NOW available with two different durometer bushings to fine tune the amount of vibration dampening. What's Included in the Mount Kit? 1) BRP Rubber Mounted SUB Adapter2) Sets of Rubber Bushings (Red = Medium and Blue = Soft.)& All Necessary Hardware.