The Descendant is a downhill race-specific crank that uses the same forged AL7050 material as the freeride/DH Holzfeller, but weighs in 240 grams less than the Holzfeller OCT. The crank also sports a revamped GXP bottom bracket with Gutter Seal Technology. Chainring & Bottom bracket provided as part of the set Chainring Middle Material AL7050 Chainring teeth 38T Bottom Bracket 68-73mm version Chainring Bolts Steel Crank arm Material Forged 7050 Alloy Crank Length 170mm BCD 104/64 Color Mirror Black (MRBLK) interface GXP – New Gutter Seal Technology Compatible Chain type 9/10 Speed Compatible Weight (approx) 822g (36t, 165mm)