Shimano Dura Ace Crankset FC-7900 Double HollowTech II Compatibility and Specs

Shimano Dura Ace Crankset FC-7900 2011

This aerodynamically designed crankset combines new engineering features together with remarkable weight saving.
High rigidity for optimal power transfer.

Thin-walled forged aluminum crank | Lightweight & Strong
Hollow chainring | Lightweight & rigid
New tooth design | Improved chain contact for power efficiency
Revised seal design for BB adaptor | Smoother rotation and longer durability

Model Number: FC-7900
Series: DURA-ACE
Crank Construction: HOLLOWTECH II
Cassette Compatibility: 10-speed
Chain Compatibility: Super Narrow HG for 10-speed
Hyperdrive: yes
Dual SIS: yes
Reinforced Spider: yes
Chainring Sets 53-42T, 52-39T, 53-39T, 54-42T, 55-42T, 56-44T
Bolt Circle Diameter: 130mm
Crank Arm Length: 165/167.5/170/172.5/175/177.5/180mm
Crank Arms: forged aluminum/anodized
Chainrings: aluminum/anodized
Chain Guard: no
Bottom Bracket: SM-BB7900 (not included)
Chain Line: 43.5mm
BB Shell Width 68/70mm
Average Weight 725g including BB
To lock the crank you'll need Shimano crank-arm/cap tool TL-FC16.
To fit or remove the HollowTech II BB, you'll need Shimano Tool TL-FC32 or alternative is the 2 in 1 Park Tool Bottom Bracket Tool BBT-9C.

Japan Retail Price: 53.897 yen (clic here to see cross rate)

Compatible with Shimano chains: CN-7900, CN-6700, CN-7901, CN-6701, CN-5701.
Compatible with ONLY: FD-7900-F, FD-7900-B, FD-7970.

Compatible with HollowTech II BB; SM-BB7900, SM-BB90, SM-BB91, SM-BB6700, SM-BB5700, SM-BB70, SM-FC7800, SM-FC4500, SM-FC6600, SM-FC6601, SM-FC5600.

Park Tool BBB-2 The Big Blue Book of Bicycle Repair - 2nd Edition