grantham Posted December 27, 2006 Report Share Posted December 27, 2006 how much of a bearing does chainstay length have on a gear ration. were talking small lengths here like 5mm difference in chainstay length, would a longer chainstay make the gear slightly easier? Quote Link to comment Share on other sites More sharing options...
Onza Kieron Posted December 27, 2006 Report Share Posted December 27, 2006 I assume it would do yer but them other geometry tweaks for the chainstays being slightly longer would make it feel easier again... Quote Link to comment Share on other sites More sharing options...
Ash-Kennard Posted December 27, 2006 Report Share Posted December 27, 2006 me, prawn and dan have been pondering this, as we all run the same gearing but our all feel really different Quote Link to comment Share on other sites More sharing options...
grantham Posted December 27, 2006 Author Report Share Posted December 27, 2006 yer i ran 18/16 on a bike with 380 cs and now run it on a bike with 385 cs and it feels much easier. But wasn't sure if it was my mind playing tricks on me Quote Link to comment Share on other sites More sharing options...
Damon W Posted December 27, 2006 Report Share Posted December 27, 2006 no.longer stays make ratio feel stiffer shorter make it feel wippyer375mm chainstays for the win Quote Link to comment Share on other sites More sharing options...
grantham Posted December 28, 2006 Author Report Share Posted December 28, 2006 anyone else? Quote Link to comment Share on other sites More sharing options...
Greetings Posted December 28, 2006 Report Share Posted December 28, 2006 (edited) Got to agree with Damon on this. The longer the chainstays, the heavier the gear ratio will feel. Think of the chainstays as a lever which extends from you hub axle to the bb. When you pedalkick, your bike levers you upwards. The longer the stays, the smaller the leverage will be thus making it harder. Thats why your gear ratio feels different.I happily rode a 18:18 gear ratio on 372 stays and it was a nightmare to gap. Add a 55mm bb rise to that and you've got the worst possible setup imaginable - no power at all. I actually think the chainstay lengh helps more in gaps than a heavier gear ratio.In my opinion:-The higher the bb, the easier it will feel-The closer the bars to the bb, the heavier it will feel-The longer the chainstays, the heavier it will feel. Edited December 28, 2006 by Inur Quote Link to comment Share on other sites More sharing options...
sUm Posted December 28, 2006 Report Share Posted December 28, 2006 I don't belive chainstay length does have an effect on how a certain gear ratio feels. I mean with 18/16 for example, regardless of any other factors your wheel will go around 1.125 times for every rotation of your cranks (assuming you're not coasting at all). With shorter stays it might make the gear ratio feel "lighter" though simply because your front end will come up easier when pedalling in the same way that using a lighter gear vs a heavier gear would.If anyone can prove this wrong from a physics standpoint then please do! Quote Link to comment Share on other sites More sharing options...
mat hudson Posted December 28, 2006 Report Share Posted December 28, 2006 it doesnt effect your gear ration however it does effect the amount of force needing to be exerted to get the bike on the backwheel, it should feel the same when pedling. Quote Link to comment Share on other sites More sharing options...
GTF Posted December 29, 2006 Report Share Posted December 29, 2006 Agree with Mr Watson there Quote Link to comment Share on other sites More sharing options...
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