switching front forks...

Stem center to center. Or are you meaning the tube. With the tube I
wouldn't go under 6 inches. Tube thu frame with headset and stem. The
tube should be a few mm below the top of the stem without the cap on.

small change said:

What do I need to check before I start on this.

The Ti-HT has an ooollllldddd RS Judy on it ( XC Hyrdracoil) and I just had
the inspiration that I could throw the SID Race that I have on it. I pulled
the Sid off the Kona last year when I put a Bomber on it, remember?

I'm assuming the travel on both is about 80mm, no problem there.

How exactly do I measure the stems, and where exactly? Let's start there.
;-)

Why do you need to measure the stem to swap out the fork? Do you mean
the length or the radius?

A couple considerations:
- Is the head tube of the Kona as long as the Ti-HTs? If so, the swap
shouldn't be a problem. You can add spacers or cut down the steerer,
but adding material ain't worth it..
- Are they both Aheadset-style headsets? That is, does the stem clamp
onto the steerer tube, or is it one of the oldfangled wedge-type
setups? This should answer the radius question too, as the vast
majority (all?) of MTB Aheadset setups were 1 1/8" diameter (not
including some Cdale and Klein units.)

If the head tube lengths are okay, I'd say bust out the allen wrenches
and the rubber mallet.

/s

Quoted message said:

Why do you need to measure the stem to swap out the fork? Do you mean
the length or the radius?

Um I mean steerer tube, not stem?

Quoted message said:

A couple considerations:
- Is the head tube of the Kona as long as the Ti-HTs? If so, the swap
shouldn't be a problem. You can add spacers or cut down the steerer,
but adding material ain't worth it..
- Are they both Aheadset-style headsets? That is, does the stem clamp
onto the steerer tube, or is it one of the oldfangled wedge-type
setups? This should answer the radius question too, as the vast
majority (all?) of MTB Aheadset setups were 1 1/8" diameter (not
including some Cdale and Klein units.)

If the head tube lengths are okay, I'd say bust out the allen wrenches
and the rubber mallet.

/s

How exactly do a measure the length of the steerer tube: do I include the
headset peices or not?

Sorry I don't know anything; Zinn wasn't specific on this.

..

Not that I'm an expert, but I'd measure as follows:

1 - Get the measurement of the existing Judy steerer tube from the top of
the crown (just below where it enters the head tube) to the top of the tube
(above where the stem clamps on).

2 - Measure the steerer tube on the SID to ensure it has at least the same
length, and check the diameter for same measurement as well.

3 - If the SID steerer tube is longer than the Judy, use spacers above/below
the stem until you're sure the bars are at the height you want. Once you
get that nailed, the tube can be cut if there is too much above the stem.

Cheers
Gary

"small change" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Quoted message said:

Why do you need to measure the stem to swap out the fork? Do you mean
the length or the radius?

Um I mean steerer tube, not stem?

Quoted message said:

small change said:

What do I need to check before I start on this.

The Ti-HT has an ooollllldddd RS Judy on it ( XC Hyrdracoil) and I just had
the inspiration that I could throw the SID Race that I have on it. I pulled
the Sid off the Kona last year when I put a Bomber on it, remember?

I'm assuming the travel on both is about 80mm, no problem there.

How exactly do I measure the stems, and where exactly? Let's start there.
;-)

I don't really have any advise (that hasn't been given), but I just
thought I'd jump in to saw woo-hoo! I'll be changing forks soon too!
I just sold my old road bike on eBay and that combined with a couple of
other items put my PayPal account up to a pretty good balance. Well, I
couldn't let that money just sit around so I just got a new 90-130mm
adjustable '06 Fox TALAS RLC. This will be replacing the 80mm Manitou
Black Elite Air I have on my Epic at the moment, and the Black will go
on to my single speed. The SS has a nice IF rigid fork on it at the
moment, but it's just a loaner, and it's just a bit rough on my rebuilt
shoulder.
So I'm excited to get this baby on there and thrash it a bit. I finally
got my Fox! Woot!

Matt

small change said:

What do I need to check before I start on this.

The Ti-HT has an ooollllldddd RS Judy on it ( XC Hyrdracoil) and I just had
the inspiration that I could throw the SID Race that I have on it. I pulled
the Sid off the Kona last year when I put a Bomber on it, remember?

I'm assuming the travel on both is about 80mm, no problem there.

How exactly do I measure the stems, and where exactly? Let's start there.
;-)

<http://www.performancebike.com/help/pdf_files/50-2103%20Forte%20Axis%20Carbon%20Fork_p2.pdf>
____
Slack

Measure frames head tube. Fork tube measurement must be more then frame
head tube measurement. Measure stem hole that fork tube goes thu from
top to bottom. I've changed many forks and never came up stort.

Quoted message said:

Measure frames head tube. Fork tube measurement must be more then
frame head tube measurement. Measure stem hole that fork tube goes
thu from top to bottom. I've changed many forks and never came up
stort.

so, if the SID I'd like to replace the Judy with is 1/2" too short, it won't
work?

small change said:

Quoted message said:

Measure frames head tube. Fork tube measurement must be more then
frame head tube measurement. Measure stem hole that fork tube goes
thu from top to bottom. I've changed many forks and never came up
stort.

so, if the SID I'd like to replace the Judy with is 1/2" too short, it won't
work?

It would work until you ovaled the steer tube, which would be pretty
quickly.

--
o-o-o-o Ride-A-Lot o-o-o-o
www.schnauzers.ws

Ride-A-Lot said:

small change said:

Quoted message said:

Measure frames head tube. Fork tube measurement must be more then
frame head tube measurement. Measure stem hole that fork tube goes
thu from top to bottom. I've changed many forks and never came up
stort.

so, if the SID I'd like to replace the Judy with is 1/2" too short,
it won't work?

It would work until you ovaled the steer tube, which would be pretty
quickly.

That last part didn't make any sense at all.

small change said:

Quoted message said:

Measure frames head tube. Fork tube measurement must be more then
frame head tube measurement. Measure stem hole that fork tube goes
thu from top to bottom. I've changed many forks and never came up
stort.

so, if the SID I'd like to replace the Judy with is 1/2" too short, it won't
work?

Not necessarily. Different stems can have different heights. For
example, I had an old steel Titec stem on a bike, similar to a Salsa. I
chucked that and got a Titec Big Al stem. The steel stem's
steerer-clamping area was roughly 2cm tall, and the Big Al's was at
least another cm tall. I had plenty of steerer tube and spacers, so the
swap was doable.

Besides, most bikes I see have at least a couple cm's worth of spacers
on it.

/s

small change said:

Ride-A-Lot said:

small change said:

[email hidden] wrote:
> Measure frames head tube. Fork tube measurement must be more then
> frame head tube measurement. Measure stem hole that fork tube goes
> thu from top to bottom. I've changed many forks and never came up
> stort.
so, if the SID I'd like to replace the Judy with is 1/2" too short,
it won't work?

It would work until you ovaled the steer tube, which would be pretty
quickly.

That last part didn't make any sense at all.

No food today and my head is spinning.

If the steerer tube on the fork was 1/2" shorter than the head tube on
the bike, eventually the steerer tube would become oval instead of
round. This would cause the fork to move around in the head tube or
worse, the steerer tube could fail.

How's that?

--
o-o-o-o Ride-A-Lot o-o-o-o
www.schnauzers.ws