Wheels Manufacturing SOLO-SPEED Cog - 23t Fits SOLO-SPLINE SOLO-XD kits BLK MFPN=041A130JQA001 BNS sold hundreds of Fjelltechs

BNS sold hundreds of Fjelltechs last season alone

Sizes 38-44T are non-aero

which are significantly more expensive

Rode Klister Racing K3 0°C to +3°C (32°F to 37°F): Imagine Rossa Special klister with a wider range and more speed

Wheels Manufacturing SOLO-SPEED Cog - 23t Fits SOLO-SPLINE SOLO-XD kits BLK MFPN=041A130JQA001 BNS sold hundreds of FjelltechsCogs are designed with narrow wide alternating tooth pattern allowing for superior chain retention Cogs are optimized for use with Solo XD Carrier system only Will not work with 13spd Campagnolo chains or 12spd Shimano HG+ chains TECH SPECS model SOLO XD description SOLO XD replacement cog teeth 23 chain 9 12sp color black