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2 votes
2 answers
806 views

Are freewheels compatible if they have the same number of sprockets and teeth?

I'm a novice to the cycling world and am wanting to learn to do my own maintenance, so I'm quite unsure of a few things. More specifically, I have a Dahon Eco C7 foldable bike that I got used and was ...
Iceape's user avatar
  • 123
6 votes
4 answers
16k views

Rusty chain and back cassette – Replace or repair?

Reference of the chain: KMC Z51 Reference back freewheel: Shimano TZ21 14-28 Teeth 7 Speed Reference of the bike: BTWIN Rockrider 340 I recently acquired a second-hand bike and decided to repair it: ...
Ced's user avatar
  • 223
3 votes
1 answer
794 views

Freewheel in vinegar

I'm renovating an older bike. I took the 6 speed freewheel (Shimano mf-tz20) off because it was rusty, disassembled, chucked the parts in vinegar overnight. The rust came off, but so did the goldish ...
András Szilveszter's user avatar