Bell Sanction Full Face Helmet - White - Black-Red Color:White - Black - Red Can also use the 39T

Can also use the 39T Inner Chainring from the Shimano Dura-Ace FC-9000

with the gel version

with no sharp edges or chamfers

but not all

Bell Sanction Full Face Helmet - White - Black-Red Color:White - Black - Red Can also use the 39TFULL 9S RAD LITTLE BROTHER At just 850 grams, the Sanction is our low profile full face mountain bike helmet aimed at dirt shredders and BMX riders who dont need the more robust Full 9 or Transfer 9. The Sanction has become the choice of adults who want full face protection but prefer a smaller size and profile. If youre riding a chairlift, go with a Full 9 or Transfer 9. But if youre pedaling BMX or dirt jumps, this helmet will serve you well.