SRAM Red XG-1190 Cassette 11 Speed 11-30T p-GSB Specialized Tarmac Comp 58cm Bike

Specialized Tarmac Comp 58cm Bike - 2008

Shimano 105 HB-5600 Front Hub QR 32 Hole

If your mountain bike rolls with a BB30 bottom bracket

5 mm Octalink

Specialized Langster 56cm Bike

SRAM Red XG-1190 Cassette 11 Speed 11-30T p-GSB Specialized Tarmac Comp 58cm BikeTop of the line road cassette with the bulk of the cogs machined in one piece of tool grade steel for low weight, no cog flex and high durability. Largest cog is aluminum. Stealth Rings between the cogs minimize chain noise Hollow steel dome makes for the stiffest gear cluster ever at the lightest weight 11 speed cassettes with 11 tooth cogs have the smallest cog located behind the cassette in the packaging