Shimano dura ace 7900 10 speed cassette 11 21 tooth
With over 35 years of service on the pro scene dura ace has always been about absolute performance precision engineering and advanced technology none of this has been compromised for the new 7900 series a new benchmark in bicycle components is about to be set the shimano dura ace 7900 10 speed cassette is a super lightweight 10 speed cassette with a rigid alloy carrier for excellent shifting even under the most demanding gear changes