SRAM PG-1231 XPLR Cogs 11-12-13 SRAM Flattop MFPN=HKMB21 Low-profile sidewalls and RiACT rim

Low-profile sidewalls and RiACT rim design creates a lighter rim that absorbs impacts for less rolling resistance and superior ride quality

Infrared preparation with hot wax

Remote kits for upgrading from non-remote systems to hydraulic XLoc remote or to replace remote-compatible dampers when not offered separately

Lightweight at 45 grams a pair

SRAM PG-1231 XPLR Cogs 11-12-13 SRAM Flattop MFPN=HKMB21 Low-profile sidewalls and RiACT rimCASSETTE REPLACEABLE COGS PG 1231 11T 12T 13T INCLUDING LOCKRING SRAM Model ID: CS SPP A0 TECH SPECS Chain Compatibility SRAM Flattop Speed 12 Cog Material Steel Cog Details 11 12 13