Suntour XC pro crank: BB spindle length??
THOMAS PATRICK GREENE
Can any of you experts tell me what spindle length I
should use with a Suntour XC pro crankset?
Thank you very much!
@..@ Tom Greene
(----) <co...@gemini.cc.umb.edu>
( >__< ) Cambridge, Massachusetts.
^^ ~~ ^^ U.S.A.
David Hallerman
writes:
>Can any of you experts tell me what spindle length I
>should use with a Suntour XC pro crankset?
The standard uses a 126mm bottom bracket spindle (125mm will do, too), but
I'm not certain about the MicroDrive (118mm???).
Dave H
da...@pipeline.com
====================
The only philosophical choice is suicide. If you decide against it, you
have no choice but to be an optimist.
Mike Lee
(David Hallerman) wrote:
> In article <00992878....@umbsky.cc.umb.edu>, THOMAS PATRICK GREENE
> writes:
>
> >Can any of you experts tell me what spindle length I
> >should use with a Suntour XC pro crankset?
>
> Is it the standard (110/74 BCD) XC Pro crankset, or the MicroDrive version?
>
>
> The standard uses a 126mm bottom bracket spindle (125mm will do, too), but
> I'm not certain about the MicroDrive (118mm???).
>
I've been using Suntour XC Pro non-MD cranks with a Shimano UN-71
68 x 122.5 bottom bracket for the past year and a half.
I haven't had any problems - except a little bit of chain rub on
my middle ring. What reason(s) are there for me to use a 125-5 BB?
-mike
Joshua_Putnam
>I've been using Suntour XC Pro non-MD cranks with a Shimano UN-71
>68 x 122.5 bottom bracket for the past year and a half.
>I haven't had any problems - except a little bit of chain rub on
>my middle ring. What reason(s) are there for me to use a 125-5 BB?
The spindle length is specified to give the best chain line with
respect to the rear cogs. If your BB spindle is 3mm shorter,
your chainrings are probably 1.5-2mm closer to the centerline of
the bike than is ideal for best shifting, drivetrain wear, and
efficiency. One or two milimeters is no big deal, however, and if
you prefer the slightly narrower Q-factor I see no reason to
change, apart from the superiority of Suntour's BB design, which
is a whole different thread.
--
Jo...@WOLFE.net is Joshua Putnam / P.O. Box 13220 / Burton, WA 98013
"My other bike is a car."
Bike parts for sale: finger Joshua...@gonzo.wolfe.net for list.
Anders Jacob Truelsen
In article <3sumbo$p...@news1.wolfe.net> jo...@Wolfe.NET (Joshua_Putnam) writes:
JP> The spindle length is specified to give the best chain line with
JP> respect to the rear cogs. If your BB spindle is 3mm shorter,
JP> your chainrings are probably 1.5-2mm closer to the centerline of
JP> the bike than is ideal for best shifting, drivetrain wear, and
JP> efficiency. One or two milimeters is no big deal, however, and if
JP> you prefer the slightly narrower Q-factor I see no reason to
JP> change, apart from the superiority of Suntour's BB design, which
JP> is a whole different thread.
My chain line is rather out-of-line (pun intended). I have to be on
the 5th or 6th (of 8) cog to get a reasonably straight line with
XC-Pro MD cranks and a 125mm spindle.
I'm a strong believer of grease-guard BBs but such spindles seems
scarce around here, I'm therefore reluctant to through the otherwise
fine spindle away. Any hints on where to find a shorter 'GG
compatible' spindle ?
Thanks
/anders
--
_0
,\ \
(*)/ ' Anders Truelsen email : leg...@daimi.aau.dk
/%%\(*) CS. Dept. http://www.daimi.aau.dk/~legolas
/%%%#%%\ University of Aarhus phone : +45 8942 3358
/%#%%%%%%#%\ 8000 Aarhus fax : +45 8942 3255
/%###% %%##%#%%\__ DENMARK Priv. : +45 8618 8915
/%%%## %%%% %####%% (these are my opinions only...)
(design by M.Harvey <mar...@wmin.ac.uk>)
BAP1969
with a 68mm bottom bracket shell. And get this: Suntour Pro cranks (yes,
those nice cold-forged, standard bolt pattern, lifetime investments) are
being dumped hard now that Suntour is no longer selling in the U.S. I
picked up a set for $60 (dealer cost used to be over $100 and my local
connection said that he paid about $40 for the set that i purchased). So,
consider stocking up, especially when you consider that the chainrings
alone would cost you $60 or more since they are hard anodized. Happy
trails!
Bryan Pasternak