Mtb fork brake replacement question

trg said:

I am replacing a bent rigid front fork (26"😉. I found a matching fork (1"
threaded), but the brake studs on the new fork are lower than the studs on
the original fork. The original fork had cantilever brakes. Aml I correct in
thinking that the new fork with the lower studs is for a v-brake? Is there
anyway to adapt the new fork to use cantis, or will I have to replace the
brakes as well as brake lever if I want to use that fork?

"V-Brakes" and traditional cantis use the same stud placement, and the
two types are generally interchangeable from frame to frame, as long as
you don't run into cable routing problems.

Your new fork is probably a "suspension corrected" model, with longer
legs than the original. If you measure up from the dropouts to the
studs, instead of down from the crown, I think you'll find the
dimensions match.

As suspension forks became more commmon, there was a trend to fit even
rigid fork bikes with taller forks. The idea was that this would permit
the user to upgrade to a suspension fork without making a major change
in the steering geometry.

The replacement fork will raise the front end of your bike a bit, and
probably make some minor changes in the handling, but it shouldn't be a
serious problem. It may just take a few miles of riding to become
accustomed to the changed handling characteristics.

Sheldon "Suspension Corrected" Brown
+----------------------------------------------------------+
| I have to mention how wary I am whenever I read bike |
| reviews which talk about how great some bike handled |
| the instant the rider mounted up. |
| If the bike immediately feels right, it's most likely |
| because it handles very similarly to whatever the |
| rider most recently rode. |
| I have bikes that I have ridden thousands of miles, |
| that handle and perform flawlessly. Yet if I've been |
| riding something different, like the tandem (especially |
| captaining) or my commuter with a heavy saddle bag or |
| pannier and then hop back on my sporty single, I spend |
| the first mile or so hardly able to get out of the |
| saddle. I'm all over the road. I would swear the bike |
| has been chopped in half. But within a short time, |
| everything is back to normal, and my trusty old bike |
| is handling great again. --Pamela Blalock |
+----------------------------------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

"Sheldon Brown" <[email hidden]> a écrit dans le message de
news:[email hidden]...

Quoted message said:

trg said:

I am replacing a bent rigid front fork (26"😉. I found a matching fork

(1"

Quoted message said:

Quoted message said:

threaded), but the brake studs on the new fork are lower than the studs

on

Quoted message said:

Quoted message said:

the original fork. The original fork had cantilever brakes. Aml I

correct in

Quoted message said:

Quoted message said:

thinking that the new fork with the lower studs is for a v-brake? Is

there

Quoted message said:

Quoted message said:

anyway to adapt the new fork to use cantis, or will I have to replace

the

Quoted message said:

Quoted message said:

brakes as well as brake lever if I want to use that fork?

"V-Brakes" and traditional cantis use the same stud placement, and the
two types are generally interchangeable from frame to frame, as long as
you don't run into cable routing problems.

Your new fork is probably a "suspension corrected" model, with longer
legs than the original. If you measure up from the dropouts to the
studs, instead of down from the crown, I think you'll find the
dimensions match.

As suspension forks became more commmon, there was a trend to fit even
rigid fork bikes with taller forks. The idea was that this would permit
the user to upgrade to a suspension fork without making a major change
in the steering geometry.

The replacement fork will raise the front end of your bike a bit, and
probably make some minor changes in the handling, but it shouldn't be a
serious problem. It may just take a few miles of riding to become
accustomed to the changed handling characteristics.

Sheldon "Suspension Corrected" Brown
+----------------------------------------------------------+
| I have to mention how wary I am whenever I read bike |
| reviews which talk about how great some bike handled |
| the instant the rider mounted up. |
| If the bike immediately feels right, it's most likely |
| because it handles very similarly to whatever the |
| rider most recently rode. |
| I have bikes that I have ridden thousands of miles, |
| that handle and perform flawlessly. Yet if I've been |
| riding something different, like the tandem (especially |
| captaining) or my commuter with a heavy saddle bag or |
| pannier and then hop back on my sporty single, I spend |
| the first mile or so hardly able to get out of the |
| saddle. I'm all over the road. I would swear the bike |
| has been chopped in half. But within a short time, |
| everything is back to normal, and my trusty old bike |
| is handling great again. --Pamela Blalock |
+----------------------------------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

Very nice, clear explanation. Unfortunately, it doesn't seem to apply. The
fork legs are the same length, only the stud placement is different. See the
photo-
http://wontyouspammebaby.free.fr/fork.jpg (original fork on the left)

-Tom

trg said:

"Sheldon Brown" <[email hidden]> a écrit dans le message de
news:[email hidden]...

Quoted message said:

trg said:

I am replacing a bent rigid front fork (26"😉. I found a matching fork
(1" threaded), but the brake studs on the new fork are lower than thestuds
on the original fork. The original fork had cantilever brakes. Aml I
correct in thinking that the new fork with the lower studs is for a v-brake?
Is there >anyway to adapt the new fork to use cantis, or will I

have to

Quoted message said:

Quoted message said:

Quoted message said:

replace the brakes as well as brake lever if I want to use that fork?

I replied:

Quoted message said:

Quoted message said:

"V-Brakes" and traditional cantis use the same stud placement, and the
two types are generally interchangeable from frame to frame, as long as
you don't run into cable routing problems.

Your new fork is probably a "suspension corrected" model, with longer
legs than the original. If you measure up from the dropouts to the
studs, instead of down from the crown, I think you'll find the
dimensions match.

[snip]

trg said:

Very nice, clear explanation. Unfortunately, it doesn't seem to apply. The
fork legs are the same length, only the stud placement is different. See the
photo-
http://wontyouspammebaby.free.fr/fork.jpg (original fork on the left)

Are you sure your original fork was for 26" (559 mm) wheels? It looks
like a hybrid/touring fork to me, especially as it has custom low rider
mounts...those are very rarely seen on mountain bikes. Looks like a
700c (622 mm) fork to me, or, possibly, since you're evidently in
France, a 650B (584 mm) model. The 584 size is a _differen_ "26 inch"
size with a substantially larger rim diameter than the 26 inch MTB size.

See also http://sheldonbrown.com/650b

If the fork on the left is actually for 26" 559 wheels, the one on the
right must be for 24" (507 mm) wheels.

Sheldon "Won't Fit" Brown
+----------------------------------+
| What sane person could live in |
| this world and not be crazy? |
| --Ursula K. LeGuin |
+----------------------------------+
Harris Cyclery, West Newton, Massachusetts
Phone 617-244-9772 FAX 617-244-1041
http://harriscyclery.com
Hard-to-find parts shipped Worldwide
http://captainbike.com http://sheldonbrown.com

"Sheldon Brown" <[email hidden]> a écrit dans le message de news:
[email hidden]...

trg said:

"Sheldon Brown" <[email hidden]> a écrit dans le message de
news:[email hidden]...

Quoted message said:

trg said:

I am replacing a bent rigid front fork (26"😉. I found a matching fork
(1" threaded), but the brake studs on the new fork are lower than the
studs
on the original fork. The original fork had cantilever brakes. Aml I
correct in thinking that the new fork with the lower studs is for a
v-brake?
Is there >anyway to adapt the new fork to use cantis, or will I

have to

Quoted message said:

Quoted message said:

Quoted message said:

replace the brakes as well as brake lever if I want to use that fork?

I replied:

Quoted message said:

Quoted message said:

"V-Brakes" and traditional cantis use the same stud placement, and the
two types are generally interchangeable from frame to frame, as long as
you don't run into cable routing problems.

Your new fork is probably a "suspension corrected" model, with longer
legs than the original. If you measure up from the dropouts to the
studs, instead of down from the crown, I think you'll find the
dimensions match.

[snip]

trg said:

Very nice, clear explanation. Unfortunately, it doesn't seem to apply. The
fork legs are the same length, only the stud placement is different. See
the
photo-
http://wontyouspammebaby.free.fr/fork.jpg (original fork on the left)

Are you sure your original fork was for 26" (559 mm) wheels? It looks
like a hybrid/touring fork to me, especially as it has custom low rider
mounts...those are very rarely seen on mountain bikes. Looks like a
700c (622 mm) fork to me, or, possibly, since you're evidently in
France, a 650B (584 mm) model. The 584 size is a _differen_ "26 inch"
size with a substantially larger rim diameter than the 26 inch MTB size.

See also http://sheldonbrown.com/650b

If the fork on the left is actually for 26" 559 wheels, the one on the
right must be for 24" (507 mm) wheels.

Sheldon "Won't Fit" Brown

Right you are, I had my friend look at the wheel that was mounted on the
bike. The tire says 700c x 42. It's a hybrid (although she ays that when she
bought it it was sold as a VTT, not a VTC.)

Merci, oh marron one,

-Tom