Shimano STEPS CD-EM800 Chain Retention Device - Frame Mount Without Plate 32T/30T Chainring Model=Alfine FC-S501 Crankset Converts to a cassette hub

Converts to a cassette hub with no additional parts

Oversized asymmetrical head is made from Cro-Moly steel for superior strength and durability

Bearing Dimensions 12x28x7mm Material Steel Number MR 17287 Bearing Grade ABEC 3

Tire Weight 290g Tire PSI 30-70 Primary Color Black Tire Width Range 30 - 38 Tire Diameter/ISO 700C/622 Bead Folding Tire Type Tubeless Ready Tubeless Technology Tubeless Compatible e-Bike approved No Labeled Size 700x33C Tire Width 33C

dual chamber air spring with self-regulating negative pressure

Shimano STEPS CD-EM800 Chain Retention Device - Frame Mount Without Plate 32T/30T Chainring Model=Alfine FC-S501 Crankset Converts to a cassette hubShimano STEPS CD EM800 Chain Retention Device Frame Mount Without Plate 32T 30T Chainring. Enjoy an added sense of security on the trails with the Shimano STEPS CD EM800 chain device for e MTB. Helps ensure chain stability and avoid chain drop through rough sections of trail Clean and compact design Compatible with 53 mm 55 mm & 56. 5 mm chain line