Bicycles Asked by durbrisingr on April 29, 2021
I have a 2001 Raleigh R600 road bike. It wasn’t ridden much when I got it, and I’ve recently been putting some miles on it. It was a 3×9 speed with 9 speed components. I just changed:
When I put a lot of force on the pedals (standing up or high gear and push hard), the chain comes off the chainring and makes a grinding/cranking sound.
LBS said components are not compatible, but my shifting is 95% optimal on the rear derailleur. I even can get into the largest cog. If I’m not pedaling with a ton of force, it rides very smoothly and shifts fine. Chain length should be good based on my calculations.
I didn’t change the chainrings, and they could be worn. Is it that or that my components aren’t compatible and it’s misaligned somehow?
I've done something similar - mixing a shimano 105 9 speed triple chainset with a 10 speed chain and a 10 speed cassette and 10 speed derailleur. It all worked adequately. It ran fine after a lot of tweaking.
However my chainrings were worn and I had similar slips while climbing. So I scored some new-old-stock chainrings for the big and middle rings, and all my slipping problems went away.
They happened to be biopace, but that's not relevant.
Answered by Criggie on April 29, 2021
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