Ian Holms Posted August 7, 2017 Report Share Posted August 7, 2017 Last Saturday I sheared the 18T on my Shimano Dura Ace 11 speed cassette. I purchased this around 3 years ago when I retired, I think from Dooleys. The 18T cog is attached by rivets to a central spider and these have sheared off. I think that I should be able to replace the spider but I would expect to have to drill the rivets out and then replace them. If it can be done ! A new shimano Dura Ace 11 speed cassette is around £150.00 ! If this can be repaired successfully then it would save me mega ! Any smart techy bike mechanics out there that might suggest possible solutions ? Quote Link to comment Share on other sites More sharing options...
2023 Subscriptions P McDonald Posted August 7, 2017 2023 Subscriptions Report Share Posted August 7, 2017 Ian I can't open the pictures...but I have customised 11 speed cassettes so that I can insert a 16t sprocket to make up a 12-28 which is not available on ultegra. If you check out the shimano service manual I reckon you could buy the segment which I am guessing is 3 sprockets pinned together, I bought the spare sprockets I needed on eBay from Japan I think as that was only place I could get them. Having said all that you have nothing to lose by trying to repin the segment as I think that is the minimum you would need to buy anyway. Cheers Ian Holms 1 Quote Link to comment Share on other sites More sharing options...
Members Richard Posted August 7, 2017 Members Report Share Posted August 7, 2017 There's a three-year guarantee on Dura Ace components, Ian. Are you definitely outwith that period? Three-cog blocks with an 18t cog are available as spare parts. Shimano call them "sprocket units". Unfortunately, it looks like they cost nearly the same as a new cassette, and if you were to buy one and run the three new cogs with your existing used chain, there's a fair chance the chain would jump under load. :-/ I'd just take the hit and buy a new cassette and chain. The repair option's seductive as a money-saving exercise, but if you somehow manage to re-pin the cog and it comes loose again when you're stamping down on the pedals, like as not you'll end up on bouncing down the road. I'm no' sure it's worth the risk. Ian Holms 1 Quote Link to comment Share on other sites More sharing options...
Members Richard Posted August 7, 2017 Members Report Share Posted August 7, 2017 Is this your cassette? http://bike.shimano.com/content/sac-bike/en/home/components11/road/dura-ace-tt-tri/cs-9000.html Ian Holms 1 Quote Link to comment Share on other sites More sharing options...
JaneF Posted August 7, 2017 Report Share Posted August 7, 2017 Ian, you are welcome to anything suitable out of my stash in the shed. Craft welding course booked for September! Bit dark at moment but could see if anything remotely suitable and bring along on Sunday if it helped.J Ian Holms 1 Quote Link to comment Share on other sites More sharing options...
Ian Holms Posted August 7, 2017 Author Report Share Posted August 7, 2017 Richard , Paul. My gut feeling is as you say. Bite the bullet and buy new cassettes (3) and new chain. I really do think a re rivet of the spider could be a dangerous option. Searching you tube , it would appear Shimano Dura Ace 9000 11 speed had this as a design fault! Of course the 9100 Dura Ace doesn't have this fault. Cheers ,thanks for your input. Now looking for best buy Ultegra cassettes + chain Quote Link to comment Share on other sites More sharing options...
2023 Subscriptions ginty001 Posted August 8, 2017 2023 Subscriptions Report Share Posted August 8, 2017 Looks like Evans is the cheapest at minute at £42 -£46 depending on what ratio, and if you're a British Cycling member you get an extra 10% off..... Ian Holms 1 Quote Link to comment Share on other sites More sharing options...
Ian Holms Posted November 9, 2017 Author Report Share Posted November 9, 2017 Dooleys returned cassette to Madison and they said it was outwith 3yr warranty. Also they asked for a proof of purchase FFS who keeps receipts these days for any length of time. Sale of goods act says faulty goods up to 6yrs are covered and a replacement should be given. Madison insisting on receipt! Dooleys have no computerised system to track purchase. Complaint ongoing................. Quote Link to comment Share on other sites More sharing options...
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