Posted: 5/16/2026 6:46:47 PM EDT
[Last Edit: Morgan321][Edited]
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Have a trek 4400 I bought over 20 years ago. The sprockets are so worn that they slip in the chain if I pedal hard. I know nothing about bikes, based on an hour reading online it looks like the below parts are all I need and they will fit my bike, can anybody confirm that? I’m a bit unsure about getting the cranks off, apparently they are square and tapered. Can I remove the sprockets from the crank while it is on the bike and just replace the sprockets? I intend to only replace the front sprockets, but the whole assembly is cheaper than buying the 3 sprockets separately. Where to buy other than Amazon?  random number 1 to 100 |
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And get a puller for square taper cranks. How does the bottom bracket feel Did you look at derailleur alignment Did you try adjusting the shifters. |
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-St. Silouan the Athonite
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Originally Posted By Anastasios: And get a puller for square taper cranks. How does the bottom bracket feel It’s tight. Everything works fine, the gears are just heavily worn, one of the sprockets looks like just nubs. So the chain slips. I read this is aggravated by a stretched chain, so I figured replace the chain also. |
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Originally Posted By Morgan321: can the pedal sprockets be swapped without removing the crank? It’s tight. Everything works fine, the gears are just heavily worn, one of the sprockets looks like just nubs. So the chain slips. I read this is aggravated by a stretched chain, so I figured replace the chain also. Originally Posted By Morgan321: Originally Posted By Anastasios: And get a puller for square taper cranks. How does the bottom bracket feel It’s tight. Everything works fine, the gears are just heavily worn, one of the sprockets looks like just nubs. So the chain slips. I read this is aggravated by a stretched chain, so I figured replace the chain also. 100%. Replace it all. |
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Remember to kick it over, no one will guide you through armagideon time...
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Remember to kick it over, no one will guide you through armagideon time...
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Remember your end, and you will not sin
Joined:
Oct 2013
Posts:
37050
EE: 100% (2)
MT, USA