Elohesra Posted July 13, 2014 Report Share Posted July 13, 2014 Why does a new chain tighten up after the first few miles? I would expect it to stretch, but it does the opposite. Link to comment Share on other sites More sharing options...
dansp1 Posted July 13, 2014 Report Share Posted July 13, 2014 Why does a new chain tighten up after the first few miles? I would expect it to stretch, but it does the opposite. It doesn't, it can't; the sprocket is out of round or the chain has tight spots and you adjusted it on a loose spot Link to comment Share on other sites More sharing options...
VanWinkle Posted July 13, 2014 Report Share Posted July 13, 2014 there shouldnt be much in the way of stretch if any at all with a new chain doing a few miles, if its got tight spots after a few miles then its probably been over tightening of the soft link thats caused it... Link to comment Share on other sites More sharing options...
Elohesra Posted July 13, 2014 Author Report Share Posted July 13, 2014 I didn't say there are any tight spots, and there aren't. I have rivetted many chains over the years and know what I'm doing, but this has happened a few times now and I just cannot work out why. If you ride a dirt bike on a beach you will have to keep backing off the chain as the sand makes it go tight, but clearly this isn't happening on a road bike on tarmac. Link to comment Share on other sites More sharing options...
VanWinkle Posted July 13, 2014 Report Share Posted July 13, 2014 I didn't say there are any tight spots, and there aren't. I have rivetted many chains over the years and know what I'm doing, but this has happened a few times now and I just cannot work out why. If you ride a dirt bike on a beach you will have to keep backing off the chain as the sand makes it go tight, but clearly this isn't happening on a road bike on tarmac. I didnt say anything about you not knowing what you were doing, I was only giving my opinion to your question and a wee bit about tight spots.. I'll leave you to it ... Link to comment Share on other sites More sharing options...
Elohesra Posted July 13, 2014 Author Report Share Posted July 13, 2014 Pardon me, I was more responding to DanSP1, who suggests I didn't adjust it correctly. I'm just curious, thats all. After a 150 mile trip yesterday on a brand new chain and sprockets, I had to back it off when I got home and remember doing this before on new kit. So I'm wondering if there is a reason. Link to comment Share on other sites More sharing options...
Wildbill Posted July 13, 2014 Report Share Posted July 13, 2014 Was the chain still hot when you checked the tension ? Link to comment Share on other sites More sharing options...
Elohesra Posted July 13, 2014 Author Report Share Posted July 13, 2014 No, fitted and adjusted cold, and re-adjusted cold again. I originally thought about heat expansion on the rollers, but its not that. Top spec AFAM chain and sprockets fitted - equal slack around the full chain length. I was thinking about things like knackered swingarm bearings which could be responsible, but its not that either - my bike is excessively fettled... Link to comment Share on other sites More sharing options...
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