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Chain-suck sucks; any suggestions on chain catchers?
Recently, I was giving a riding buddy of mine a hard time because his bike kept dropping the chain during the big-to-small downshift, and the repeated chain-suck did pretty decent cosmetic damage on his shiny Trek Emonda SLR frame. I told him there should be no chain drop if everything is adjusted correctly (he uses SRAM Red ETap).
Famous last words, as it happened to me on today's ride... Going uphill, I was in the 52-28 combo and decided I didn't want to grind it anymore so I simultaneously shifted down two gears in the back and shifted into the small ring in the front. I also hit a little bump right while shifting, and next thing you know the chain is jammed up in there really good. Took me about 5 minutes to untangle everything and carefully pull the chain out. There are now a couple decent gauges and scratch marks on my nice carbon frame around the bottom bracket. It was bad enough that it actually ended up bending the chain so it was skipping like crazy and I had to call for a ride from my wife. I had told myself that I should order a chain catcher proactively, but had convinced myself that the FD is very well adjusted so there should be no problem (I don't recall the last time this happened to me on any bike I have owned). Live and learn as they say... Any suggestions on a braze-on mount chain catcher that works well? Last edited by fa63; 10-14-2019 at 04:05 PM. |
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k-edge pro has worked for me for the last 5+ years.
have never dropped onto the inside. |
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K-edge.... |
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Chain catchers only deal with chain drop, not chain suck.
Tai
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One opposing views against the K edge. You torque it enough that the chain gets under the K-edge, you're going to have a helluva time getting it fixed roadside.
K edge looks cool, but for a catcher I think the dog tooth ones work far better. |
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Good point; maybe chain-suck is not the technically correct way to describe this. This is a carbon frame with a non-round seat tube which gets very wide at the bottom bracket area. So I am afraid a dog-tooth version won't work here. Last edited by fa63; 10-14-2019 at 03:56 PM. |
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Quote:
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Assuming your der limits and all are dialed in correctly, I'm guessing that this is all completely controllable by you. I used to double clutch all the time, but did have the occasional chain drop like you, but then I just gave just a moment's pause between shifting the rear and then, with a slight let up on the crank, dropping into the small chainring. No problemo.
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just pointing out that chain suck is different than chain drop. Chain suck from what I understand (and what I had on my OPEN till I went 1x) is when the chain gets sucked from under the chainring and into the BB. Chain drop is when the chain falls in from the top into the BB.
Very different. For chain drop, usually a chain catcher will help... chain suck is a lot more a problem and for new bikes, no real device to prevent it. |
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A really excellent chain guide (sim to Deda Dog Fang, but I prefer N-Gear for ease/dirability) is the N-Gear Jump Stop, but those are for mounting on round seat tubes. This is what the N-Gear owner states about tubes like on your frame, and so recommends a direct competitor (K-Edge). "Derailleur-mount guide: |
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Chainsuck is when a chain does not release from the bottom of the chain ring and starts to wrap around to 360 degrees. Pedaling comes to an abrupt halt. Bontraeger used to have a guard that would catch the chain.
Does chain suck no longer occur?
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it does.
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Deda Dog Fang. If your bike can accommodate it. Low key. Light weight. More reliable than a K edge. From experience.
Sent from my Mi 9 SE using Tapatalk |
#14
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Never had that problem, not even when I was racing. I do understand chain drop from having the FD set a few mm off but from there to get the chain sucked, i cant even explain how it could happen because never happened to me.
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Correct altho one(spitting chain past small ring) can 'cause' the other(chain gets grabbed by the CR bolts or part of the small ring). If you are having chainsuck issues, that is, the chain doesn't want to come off the chain..then a new chairing, the 'hooks' of the teeth are grabbing the chain. Chain watcher keeps the chain from missing the small ring and a good idea on all rigs, IMHO.
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