Full Speed Ahead Gossamer Tandem Front Crankset - 175mm Single Speed 42t 130 BCD Full Speed Ahead MegaExo Spindle Interface BLK MFPN=BX-HB2131855-BK These preset torque-limiting extensions are

These preset torque-limiting extensions are based on standard ¼”-drive sizing for easy cross-compatibility with any accessory bits and drivers

Internal Lock Size Imperial 5x9 Lock Type Key Primary Color Grey Bracket Flexframe Thickness In mm 13mm Internal Lock Size Metric 127X229mm

Also fits the disc brake rotor nuts with 16 external notches

Extra length (150 links) for the Boost's longer wheelbase

90 Material Alloy S

Full Speed Ahead Gossamer Tandem Front Crankset - 175mm Single Speed 42t 130 BCD Full Speed Ahead MegaExo Spindle Interface BLK MFPN=BX-HB2131855-BK These preset torque-limiting extensions areThe FSA Gossamer Tandem Crank Bottom Brackets sets feature cold forged AL6061 T6 aluminum crankarms with a MegaExo spindle. Shimano and SRAM 10 Speed compatible 2 Bottom bracket spacers allow for adjustable chainline 35. 0mm Tandem specific braze on front derailleur clamp included with rear cranks Cold forged AL6061 T6 aluminum crankarms Monocoque crankarm and spider 165mm Q Factor 7900 and Campagnolo 11 Speed compatible chainrings sold separately