On Tue, 9 Sep 2003 13:23:50 -0400, "Michael Dart" <[email hidden]> wrote:
:
:"Dan Musicant" <[email hidden]> wrote in message
:"]news:[email hidden]...
:> On 9 Sep 2003 08:43:05 +0950, DiabloScott <[email hidden]> wrote:
:>
:> 😄an Musicant wrote:
:> : > To me it appears that the rear changer is not vertical but tilted so that the bottom is
:> : > closer to the wheel than the top.The angle off vertical I'd estimate at 3 degrees. I have
:> : > tried changing this angle
:to
:> : > acheive vertical with the "B Tension" adjustment screw on the Shimano rear derailer.
:> : > However, from the tightest adjustment to the loosest I detect no effect on the
:> : > aforementioned angle. Am I wrong in thinking that this adjustment screw affects that angle?
:> : > What am I missing? Thanks for any help. Dan
:> :
:> :
:> :
:> :Yes, you're wrong - the B screw changes the gap between the top of the :jockey pulley and the
:> bottom of the cogs - you usually need to adjust it :when you're changing to a cassette with
:> different gearing. There are no :adjustments to the angle the derailleur cage makes with the
:> vertical - :except for bending.
:>
:> Yep. I figured I had the wrong concept. Thanks, and to Mike too! I will make the angle adjustment
:> with a large crescent wrench, and carefully so as not to hurt any threads. I figure the pullies
:> should dangle vertical to the ground, no?
:>
:> Dan
:>
:
:Yes, more correctly parallel to the rear wheel (assuming properly dished and :true). Which is what
the derailleur alignment gauge checks for. If you are :in good with your LBS it shouldn't cost much
to have it sorted out. I have :my own tool because I have a downhill bike that gets bent frequently
and I :can't be [censored]'d with going to the LBS every time.
:
:Mike
:
I wouldn't say I have a good working relationship with any LBS. I've always done my own maintenance
and repair but a lot of stuff I've never done or done so infrequently that intervening years have
blurred or erased the knowledge I had to gain in order to do the job the time before! I have a
couple of books that discuss bike repair, but one is almost 20 years old and the other has bike
repair as a sub-theme. I should maybe get another book. However, nowadays I can find out things
online, it has been pointed out.
Why would your downhill bike get bent frequently?
Downhill is the thing that scares me the most on a bike, easily. I'm a very safe city rider, having
sorted out the mischief, but downhill is something that I figure is always dangerous. The only thing
you can do, other than be very alert and sensible in the way you ride, is to make sure your
equipment is OK as much as possible.
Dan
