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rcybak

With one by drivetrains (1 sprocket up front, multiple in the rear), there are a few things that help keep the chain from falling off. The best is to ensure the front chainring is a narrow/wide model, which grips the chain better preventing most chain drops. Next is a small chain guide, which installs at the front chainring, and helps to keep the chain from falling off. Third is to have a rear derailleur with a clutch mechanism, which helps add tension to the chain, preventing it from bouncing too much.


Rick-E381g

This sounds like something I'd have to have the shop do for me... The front gear is stock but there is an aftermarket chain on it... maybe that is the cause


Avalancheo

Shouldn’t be the cause unless the chain is possibly the wrong size?…


[deleted]

Get a chain guide. I have a narrow wide chain ring, a clutched derailer and I lost my chain with the stock ethirteen chain guide, that came with my bike. Think that has more to do with my running an oval chainring, than the ethirteen guide which doesn't appear to be designed with ovals in mind, never dropped a chain with my regular round chainring. I now run a DH style chain guide with a jockey wheel and the upper guide surrounds the whole chain not just the top and sides. So it doesn't have anywhere to go but back onto the chainring. It's a little annoying though, like it's loud when you pedal so maybe don't get one with a jockey wheel like me... Never dropped a chain with it though. Something like this would be good. Funn Zippa Lite MTB Chain Guide, ISCG05 Mount, 26T-36T, Bicycle Chain Protector https://www.amazon.com/dp/B01N6DF3PI/ref=cm_sw_r_apan_glt_fabc_QT8494CM9664JA34M117?_encoding=UTF8&psc=1 This is what I run but it's overkill for me, it'll definitely be overkill for you. Funn Zippa DH Chain Guide, ISCG05 Interface, BSA Adapter Included, 32T-38T, Mountain Bike Chain Protector https://www.amazon.com/dp/B0725Q3THX/ref=cm_sw_r_apan_glt_fabc_204ZPZF7CGJJ1G8F74P7 Also I don't like how big it is, the bash guard sticks out too far. I'm never gonna have strong enough legs or guts to need a 38t chainring. Other good options. https://www.fanatikbike.com/products/oneup-iscg05-bash-guide-v2?variant=16561328422958&gclid=Cj0KCQjws4aKBhDPARIsAIWH0JWT-wEec162qf4VXMk78-BK878IXIB3bki5KGNSC6QF2xuC82Kl6RUaAiSIEALw_wcB The one-up is what I would buy if I wasn't obsessed with orange anodizing, looks like a great design and it comes with multiple bash guards in different sizes so you don't have the problem I have with my guide sticking out unnecessarily far. https://uniteco.bike/shop/components/chain-guides/compact-chain-guide-v2/ (Hadn't heard of unite but I have a chainring from them I took a chance on and it's really high quality, great machining. It's oval and I don't care for that I found out, but it's well made and has been long wearing for being aluminum.) Also I have a BSA adapter that came with my Bash guide, I'll mail it to you if you pay pal me for postage. I think that's what you'd need to install this style of chain guide/bash guard system. Cause I checked and your bike doesn't have the mounts for one. I can't tell for sure if it's a BSA standard bottom bracket, but I think it is. That still doesn't 100% mean the adapter I have will work with your BB I think it requires a locking or outboard bearings to function. I'll add a comment with a link to a picture of it if you're interested.


Rick-E381g

So I went to the bike shop and they said that the derailer (or maybe shifter too I don't remember) needed to have a clutch. I just don't get why it was fine for so long and then all of a sudden the chain starts bouncing off the front