You are reading a single comment by @iamalex and its replies.
Click here to read the full conversation.
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
iamalex
Check your cassette spider. The last three cogs on a dura ace cassette are held together with a carbon/plastic carrier which can crack under extreme loads (i.e. steep UK climbs)
I've cracked one myself - it's a well known flaw. Shimano will warranty it though if you're the original owner.