Today's Forum Topics
Set as homepage
|
View
New Forum Topics Today's Forum Topics Set as homepage |
 |
|
|||||||
| |
||||
Welcome to CyclingForums.com You are currently viewing our website as a guest which gives you limited access to view most discussions. You will have to register before you can post to this thread. By joining our free online community you will have access to post new topics, communicate privately with other cyclingforums.com members (PM), respond to polls, upload photos and access other special features like product reviews and classifieds. |
|
|
Thread Tools | Search this Thread | Display Modes |
04-05.-2004, 12:17 AM
|
#1 |
|
Guest
Posts: n/a
|
calculating correct length axle (fitting new chainset to old mtb)
I have a n.o.s deore chainset (2002 compact drive)to replace worn set
on 93 stumpjumper, have reamed and faced bb shell, fitted "new style" cartrige bb, and wish to know if it is a case of trial and error (ie: see if it jumps or not) or if there is a calculation/specific method to know if i need to fit a new/different length axle, or if my original will do. old kit was 93 dx chainset with 170mm sq taper cranks and bio-pace full size rings, ill still be using a 7sp hg cassette (a new one tho) A friend "thinks" if when the chain is on middle front ring and 4th cassette ring, it should "line up straight" when looking along length of bike?????? |
|
|
04-05.-2004, 12:45 AM
|
#2 |
|
Guest
Posts: n/a
|
Re: calculating correct length axle (fitting new chainset to oldmtb)
John.w wrote:
> I have a n.o.s deore chainset (2002 compact drive)to replace worn set > on 93 stumpjumper, have reamed and faced bb shell, fitted "new style" > cartrige bb, and wish to know if it is a case of trial and error (ie: > see if it jumps or not) or if there is a calculation/specific method > to know if i need to fit a new/different length axle, or if my > original will do. > > old kit was 93 dx chainset with 170mm sq taper cranks and bio-pace > full size rings, ill still be using a 7sp hg cassette (a new one tho) > > A friend "thinks" if when the chain is on middle front ring and 4th > cassette ring, it should "line up straight" when looking along length > of bike?????? That's not wrong. See also: http://sheldonbrown.com/chainline and: http://sheldonbrown.com/bbsize Sheldon "Numbers" Brown +-------------------------------------------------------+ | I found no fault with the cook, and it was the rule | | of the voyage that the cook found no fault with me. | | There was never a ship's crew so well agreed. | | --Joshua Slocum _Sailing Alone Around The World_ | | http://eldred.ne.mediaone.net/js/saaw.htm | +-------------------------------------------------------+ Harris Cyclery, West Newton, Massachusetts Phone 617-244-9772 FAX 617-244-1041 http://harriscyclery.com Hard-to-find parts shipped Worldwide http://captainbike.com http://sheldonbrown.com |
|
|
|
06-05.-2004, 02:32 AM
|
#3 |
|
Guest
Posts: n/a
|
Re: calculating correct length axle (fitting new chainset to old mtb)
John.w <j.jtw@tiscali.co.uk> wrote:
>A friend "thinks" if when the chain is on middle front ring and 4th >cassette ring, it should "line up straight" when looking along length >of bike?????? There's no formal method for this; you want to have the chain as straight as possible in the gears you expect to use. For instance, I have a 52/34, but only use the 34 rarely on steep inclines. Therefore I try to arrange that the 52 lines up with the third smallest sprocket, my usual flat cruising gear, which also neatly lines up the 34 with the largest sprockets, those being the ones I use it with. -- David Damerell <damerell@chiark.greenend.org.uk> Distortion Field! |
|
|
Linear Mode
