Shimano Ultegra CS-6600B 10 Speed Cassette
Popular cassette for Shimano 10 speed users who do not want to dole out the extra cash for Dura-Ace but want the performace. The Ultegra 10 speed cassette works on all Shimano 8,9 or 10 speed hubs as well as Mavic M10 hubs. The cogs are treated for long wear and include a steel lockring.
Please Note: This cassette requires the Park FR-5 for installation and removal.