> Pep wrote:
> > RBT: I replaced the old LX crankset and tapered BB with a new LX hollowtech and splined BB. I
> > replaced the BB with the same size as the original tapered model - 73x113. Now my chainline is
> > completely off
> > - in fact, the smallest chainring actually bottoms out on the BB shell if I torque the
> > drive-side crankarm down all the way. I could try a 73x118, but I'm not convinced that the
> > additional 2.5mm on the drive side will be sufficient to give me the correct chainline.
"MOGorospe" <
[email protected]> wrote in message
news:[email protected]...
> I am having the same problem. I purchased the Shimano Octalink, LX crankset to replace my original
> ones. As suggested, I got BB at it's original size..73X113. It's not working out. Even with the
> 118, a spacer had to placed and it's still rubbing on the derailleur. My question is, did the
> 121mm work for you. Because from the looks of it, I have to get the 121mm to make it work. My bike
> shop is suggesting to keep the crankset, and replace my entire bike component to 9-speed, which I
> don't want to do. I want to remain at 8 speed.
I am confused by these frequent crank/BB posts. In my experience, Shimano's printed directions in
the crank box are correct nearly always, unless there's some drastically weird frame involved . In
the case of a FC-M571, Shimano suggests a 113 for a 47.5 and a 118 for the alternate fat-tube 50mm
chainline. I have installed a few ( certainly not a lot of them here, but some) of these cranks this
year without incident using the Shimano specified BB lengths. As a matter of fact, we hardly ever
change a BB length once its installed according to the spec. We couldn't get anything done in a day
if we had to intuit and experiment with that sort of thing. So I wonder what's up .Did your
chainring hit the chainstay? When you say "it's still rubbing on the derailleur" do you mean the
chain drags the cage? Did you unscrew the inner limit? Is your frame som unusual item?
And when your advisor suggests "my entire bike component to 9-speed" what the heck would that do to
move the crank arm on the spindle?? I don't understand that at all.
--
Andrew Muzi
http://www.yellowjersey.org Open every day since 1 April 1971
