[RBW] Re: headset stack height?

2010-05-10 Thread Michael_S
I have found that you really have to pay attention to the headset
stack height. On an older Bridgestone T700 I have, I luckily bought a
lower stack height headset and even then I could only get the top nut
to thread about 3-4 threads. I had to find a thinner cable guide to
even get that much engagement. I've seen a variance of up to 7 or 8 mm
on threaded headsets stack height.

~Mike~

On May 9, 10:40 pm, CycloFiend cyclofi...@earthlink.net wrote:
 on 5/8/10 8:10 PM, Horace at max...@sdf.lonestar.org replied to:

  I was looking at this picture of a large custom Rivendell with a tall
  headset:

 http://tinyurl.com/23rzeqm
 with
  There is no choice. If you have a tall steerer tube, you need the spacers. 
  If
  you want less height, you have to cut the steerer and use fewer spacers.

 There's actually a little more to it than that - This idea of using spacers
 on a threaded fork steerer cropped up in a Reader some time back - I think
 it was a Mark hack.  (And I'm sure others have done it before, but this was
 the first time I saw it specifically outlined in print. Certainly, using a
 couple short spacers had been SOP.)

 Since the fork is threaded, you are really changing the stack height of the
 headset. Before you shorten the extension of the steerer tube, you want make
 sure that the threading goes far enough down so you can tighten the top nut,
 or plan on having the steerer threaded after cutting it.

 The taller steerer tubes combined with the spacers probably allow a single
 fork to be used on more than one frame.  When the fashion was to keep the
 steerer tube cut to the miminim amount necessary to poke through the headube
 of the frame, you pretty much had to have a fork matched to each size.

 - Jim

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[RBW] Re: headset stack height?

2010-05-09 Thread Bill M.
Not to threadjack, but that's a bike that's big enough to justify the
diagonal tube.  Interesting that Grant added mid-stays on this one,
but not on the current designs.

Bill

On May 8, 5:12 pm, happyriding happyrid...@yahoo.com wrote:
 Hi,

 I was looking at this picture of a large custom Rivendell with a tall
 headset:

 http://tinyurl.com/23rzeqm

 Does the steerer go all the way up into the spacers?  Can you add as
 many spacers as you want as long as you have enough steerer length?

 Thanks.

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[RBW] Re: headset stack height?

2010-05-09 Thread MichaelH
Isn't that a pretty bike!  The diagonal tube not only strengths this
big guy, but makes it look more proportional.  The stack height
transitions nicely between the head tube and the stem.  The
alternative would be either a much longer and heavier head tube or a
very high stem.

Unfortunately, for the OP, if you want higher bars, your choices are
usually, either a new fork (expensive) or a new stem.  Riv sells a
couple of options that can help raise the bars

Michael.

On May 8, 8:12 pm, happyriding happyrid...@yahoo.com wrote:
 Hi,

 I was looking at this picture of a large custom Rivendell with a tall
 headset:

 http://tinyurl.com/23rzeqm

 Does the steerer go all the way up into the spacers?  Can you add as
 many spacers as you want as long as you have enough steerer length?

 Thanks.

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