Shimano alfine chain guard

Product Description The - Compatible with FC-S500 and FC-S501 This chain guard is a Shimano spare part for Alfine FC-S500 and other cranks. There are versions for different chainring sizes and for mounting on the outside or inside of the chainring. The inner chain rings are made of plastic, the outer ones of aluminium. Technical Information:Size:42 T, 45 TBolt Circle Diameter:130 mmMount:inner, outerCompatibility:FC-S500FC-S501FC-S400Manufacturer Numbers:black / inner 45 tooth:Y-1HD63000silver / outer 39 tooth:Y-1HD62000black / outer 42 tooth:Y-1PB11010silver / outer 42 tooth:Y-1PB11000silver / outer 45 tooth:Y-1HD61000Contents:1 x Manufacturer: Shimano Europe B.V. High Tech Campus 92 5656 AG Eindhoven Netherlands info@shimano-eu.com