Sprockets wear out with use. If your chain is jumping when you turn your wheel, it is likely time to replace this part.

While you have the assembly apart for replacement, consider performing the routine maintenance as well by getting the pedestal and break maintenance kits, #Z3410 and #Z2663, related in May We Also Suggest below.

• Length, overall: ~2-5/8"
• Outside diameter: ~1.60"
• Outside diameter, sprocket:~2.41"
• Number of sprocket teeth: 11
• Chain specifications for sprocket: 5/8" #50 chain
• Inside diameter: ~1.003"
• Key details, width & depth: width ~0.251", depth ~0.125"
• Slots, length, overall: 5/8"
• Slots, width: 5/16"
• Set screw specifications: 5/16"-18 flat tip, length 3/8"

Early Edson information lists both stainless steel and slightly less expensive bronze versions of this sprocket. The bronze version has been discontinued in favor of this stronger stainless version.