- Chainsuck on new bike build???
I've just built a 14" 456 up for my girlfriend using brand new quality kit. I used the same transmission set up as I run successfuly on my own 18" 456…. Middleburn Square taper cranks, 68/113 bottom bracket, Middleburn Hardcoat Slickshift Chain rings and XT kit with a £40 KMC chain. On her first ride out she started getting chainsuck when changing down and the chain travelled round middle ring and up round the chain stay, scratching the new frame. I rode it and got the same thing. We took it back to the workstand but everything was set up properly so I swapped out the Middleburn chainrings for a brand new set of Blackspire rings. The result was perfect, trouble free changing with no hint of the problem recurring.
I've used Middleburn Chainrings for ages and never had this problem and visualy I'm struggling to identify any obvious fault with these. I can't think of any other explanation except that there is something wrong with these Chainrings. Thus I've sent them back to Middleburn with a covering note and I'm waiting on their reply.
Has anybody any other ideas as to what went wrong?Posted 8 years agoclubberMember
slowrider – it's not actually the frame that causes chainsuck – it's just that the on-ones tend not to have much clearance between the chainrings and the stays meaning that if you do get chainsuck it causes damage but doesn't actually cause the chainsuck in the first place (if that makes sense!)
billy – any stiff links? Maybe where you joined the chain? Otherwise, it does sound like something's off with the middleburn rings – never heard of it before, mind.Posted 8 years agoOnzadogSubscriber
I had exactly the same thing a while back. Middeleburn slickshift hardcoat rings that just wouldn't shift cleanly. Switched to raceface rings and it's all fine. I got the shop to swap them over for me and then deal with Middleburn. So, if Middleburn tell you it's never happened to anyone before, it's not true!Posted 8 years agotruszMember
I had exactly the same problem with a 36t/22t slick shift hardcoat ring. I rang Middleburn and and they recommended a Shimano chain instead of a SRAM and I must admit, it seems to have worked. There is a very slight sucking now and again but it doesn't drag the chain all the way up, I hear a little click and it drops off.
What Blackspire ring did you get? I may consider changingPosted 8 years ago
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