FSA (FSA Speed Ahead) 8420ST Power Drive Bottom Bracket - English 73x118mm FSA Power Drive Spindle Silver. Replacement bottom bracket for FSAs Power Drive splined cranksets. The stiff forged hollow chromoly spindle is supported by a pair of sealed industrial cartridge bearings. Additional weather protection comes from double “Snap” seals.
Forged hollow SCM4130 chromo spindle
Industrial 6002KRS cartridge sealed bearings with oversized 3/16” diameter balls
Cold forged aluminium cups
Double “snap” seals for water and dirt protection
| Bottom Bracket Shell I.D. | 34 |
| BB/Frame Interface | English |
| BB Shell Width (mm) | 73 |
| Weight | 335 |
| Spindle Length | 118mm |
| Defined Color | Silver |
