37551
• Rear Track/Freewheel Sealed Cartridge Bearing
• Sealed cartridge bearings
• High flange design
• Spacing: 100mm frt, 120mm rear
• HOLLOW CORE lightweight heat-treated axle
• New lighter design
• 37544 --- 32H B/O 3/8 1sp FX/FW Black
• 37551 --- 32H B/O 3/8 1sp FX/FW Silver
• 37554 --- 36H B/O 3/8 1sp FX/FW Black
• 37555 ---  36H B/O 3/8 1sp FX/FW Silver 

37531
• Front Sealed Cartridge Bearing
• Sealed cartridge bearings
• High flange design
• Spacing: 100mm frt, 120mm rear
• HOLLOW CORE lightweight heat-treated axle
• New lighter design
• 37531 --- 32H B/O 3/8 Black
• 37539 --- 32H B/O 3/8 Silver
• 37542 --- 36H B/O 3/8 Black
• 37543 --- 36H B/O 3/8 Silver

 

 

26283
• DER PART OR8 SGL SPD KIT CONICAL 16&18/SPCR/GIDE
• Converts a cassette hub to a single speed
• 8 spacers included in various sizes to adjust chain line
• Anodized 6061 alloy
• Fits Shimano style cassette bodies
• New conical spacers for increased cog stiffness
• Includes single-speed guide, 18T & 16T cogs