"Gordon" <[email hidden]> wrote in message
"]news:[email hidden]...
Quoted message said:I have a 5yr old Univega 500 racelite frame with solid
forks. I hope to change these to a decent set of
suspension forks soon. I was told to
measure
Quoted message said:the diameter of the stem (believed to be 1`1/8 dia) go to
the nearest bike shop and buy some! So far so
good,.................But surely it cant be that easy or
can it? Ive since heard that there are threaded and
unthreaded stems. Can someone please tell me what I should
be looking for so I dont get the wrong ones
and
Quoted message said:is it correct I may have to saw a bit off the end of the
stem if its too long....................G
Sorry to change the subject line, but I couldn't reply to a
message with that header...the images one gets....;-)
There's not much to worry about with threadless forks, whcih
I'm pretty sure is what you'll have. You'll know the
difference by the way you adjust your headset; I presume you
loosen your stem (usually with two a/k bolts at the back of
the stem), tighten (or loosen) another allen key bolt in a
cap set into the stem, and retighten the stem bolts? If this
is the case - threadless.
If, on the other hand, your headset has two 38mm - ish
fittings, one an adjusting cup and the other a locking nut,
and you adjust your headset with these - threaded fork.
If you have threadless, the length of the fork steerer is
irrelevant, as long as it's long enough! (In other words,
you can cut it down to whatever length you want.) If you
have threaded, you need to get the right length, because the
thread itself has a finite length. You'll probably need to
buy *slightly* longer.
Steerer diameter will be either 25.4 or 28.6mm. These are
referred to as 1" and 1 1/8" (unsurprisingly), but be
careful - if you see 25.4mm on the *stem*, you have 28.6mm
*forks* - the inside diamter is obviously different from the
outside diameter of the tube!
Finally, there is just a slight chance that your headset
crown race might be a different size. Don't panic about this
- it's unlikely, and the worst case scenario is that you
just buy a new headset, which might not be a bad thing after
5 years, anyway.
HTH
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