POC Tectal Helmet - Uranium Black Matte, Large Crupi Hub Lock Rings are

Crupi Hub Lock Rings are Shimano compatible and require a Park F-R5 lock ring tool

If the stem’s side bolts are over-tightened

NOTE: For 22/24mm SRAM/Truvativ cranks you will need to select the SRAM option on the crank menu

which maximize the efficiency of power transfer on acceleration

POC Tectal Helmet - Uranium Black Matte, Large Crupi Hub Lock Rings areThe well ventilated Tectal has been specifically developed for aggressive trail riding and enduro racing and incorporates the aramid bridges system from POC's proven and award winning Trabec helmet. Reinforced EPS liner provides a high level of protection and the unibody shell construction further enhances the safety properties and construction integrity of the helmet while maintaining a low weight Offers more coverage at temples and back of head and