Shimano alfine cassette joint fitting kit s500shimano have been producing bike components since 1921 over the years they have designed and developed some of the best mtb hubs and spares ever seen featuresvertical and horizontal drop out non turn washers 8r8l 6r6lcap nuts and cj 8s20 cassette joint unit alfine shifter and sprocket not includeda 2 year warranty is offered with all shimano products from chain reaction cycles 3 years on dura ace and xtr products buyshimano wheels tyre