Luke Rainbird Posted October 31, 2012 Report Share Posted October 31, 2012 Hey guys, Don't suppose anyone here knows the "exact" chainstay length for running an 18:13 ratio at all, do they? Or happens to be running 18:13 and wouldn't mind measuring (with a tight chain, please) Very much appreciated, cheers Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted October 31, 2012 Report Share Posted October 31, 2012 (edited) you can get the right length every 1/2" :wink2: ,so you´d have to tell a basic cs length from wich someone could tell you.24,26,20?straight or angled dropouts?etc.. Edited October 31, 2012 by FamilyBiker Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted October 31, 2012 Report Share Posted October 31, 2012 With no chain stretch: 358.6, 371.3 or 384.0. These might not all be PERFECT, but they should be close enough... http://www.tartybikes.co.uk/images/custom/sprockets/chainstay.xls 3 Quote Link to comment Share on other sites More sharing options...
Luke Rainbird Posted October 31, 2012 Author Report Share Posted October 31, 2012 Hero, cheers Ads Quote Link to comment Share on other sites More sharing options...
isitafox Posted October 31, 2012 Report Share Posted October 31, 2012 Yes as above, legend! Quote Link to comment Share on other sites More sharing options...
Ash-Kennard Posted October 31, 2012 Report Share Posted October 31, 2012 additional question, are chainstays measured from the centre of the bb? Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted October 31, 2012 Report Share Posted October 31, 2012 yep Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted November 1, 2012 Report Share Posted November 1, 2012 that made me interested can i run 22:17 with 360 cs? how much are the lenghts for 22:17? Quote Link to comment Share on other sites More sharing options...
isitafox Posted November 1, 2012 Report Share Posted November 1, 2012 Courtesy of Tartybikes 3 Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted November 1, 2012 Report Share Posted November 1, 2012 thx a lot! Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted November 1, 2012 Report Share Posted November 1, 2012 http://www.tartybike...s/chainstay.xls Quote Link to comment Share on other sites More sharing options...
isitafox Posted November 1, 2012 Report Share Posted November 1, 2012 How much would you allow for chain stretch using a Z610? Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted November 1, 2012 Report Share Posted November 1, 2012 1% chain stretch = time to change it. So that's... about 2mm for a 400mm chainstay. Quote Link to comment Share on other sites More sharing options...
isitafox Posted November 1, 2012 Report Share Posted November 1, 2012 So the Echo 24 running 18-14 with 360 chainstays the rear wheel is actually at 368? Just gaining knowledge as when I order my 24 frame I would rather have vertical dropouts so I don't have to use a tensioner or adjustable disc mount Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted November 1, 2012 Report Share Posted November 1, 2012 It'll be 356 I think, then nearer 358 with the chain stretch. You can't put 'proper' geo sometimes or it blows people's minds not seeing round numbers If you have vertical dropouts, you will need some sort of tensioner, because of the chain stretch. 2mm extra length makes a chain VERY flappy. Quote Link to comment Share on other sites More sharing options...
Ali C Posted November 1, 2012 Report Share Posted November 1, 2012 you don't need to run either with horizontal dropouts. 1 Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted November 1, 2012 Report Share Posted November 1, 2012 ^^ Man speaks the truth. Quote Link to comment Share on other sites More sharing options...
isitafox Posted November 1, 2012 Report Share Posted November 1, 2012 Need more info. Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted November 1, 2012 Report Share Posted November 1, 2012 Horizontal dropouts, normal 'round hole' disc mounts, that's all you need. Quote Link to comment Share on other sites More sharing options...
isitafox Posted November 1, 2012 Report Share Posted November 1, 2012 I assume you mean the disc will allow a mm or so in stretch as long as it's positioned correctly for the required gear ratio used? 1 Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted November 1, 2012 Report Share Posted November 1, 2012 Yep, easily Quote Link to comment Share on other sites More sharing options...
Azarathal Posted November 2, 2012 Report Share Posted November 2, 2012 The way the calipers are designed rather than having less pad contact when you pull your wheel back it just bites a slightly different point on the disc if I remember a post I saw on here Quote Link to comment Share on other sites More sharing options...
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