Gears feel rough

For discussions about bikes and equipment.
Brucey
Posts: 42990
Joined: 4 Jan 2012, 6:25pm

Re: Gears feel rough

Postby Brucey » 2 Jun 2018, 8:27pm

blimey.... :shock:

one half link on a typical derailleur chain is ~1% extension and both chains ae well past that. 0.75% is about the most that you can get away with if you want to re-use the freewheel. To be really safe call it 0.5%.

Suggestion; once the new chain is worn to about 0.4%, refit the old freewheel and run it for a week or two. Then try it with a new chain. If you are lucky it shouldn't skip with the 0.4% chain, and having been worn to match that, it ought to take a new chain OK too.

cheers
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Fraz101
Posts: 146
Joined: 15 Feb 2018, 12:47pm

Gears feel rough

Postby Fraz101 » 2 Jun 2018, 8:41pm

Brucey wrote:blimey....

Suggestion; once the new chain is worn to about 0.4%, refit the old freewheel and run it for a week or two. Then try it with a new chain. If you are lucky it shouldn't skip with the 0.4% chain, and having been worn to match that, it ought to take a new chain OK too.

cheers


Not sure I follow you here?

I’ve re fitted the bottom chain in the picture as when I installed the brand new chain 7th gear is slipping, it’s not skipping on the old chains as the freewheel is obviously matched with the chains.

Also I can only assume those sram chains are absolute junk????