Rear spacing question(s)

Quoted message said:

Can a 135mm rear spacing be changed to 130mm? If yes...what does this
entail?

Owen

On a frame? What is the frame material?

Or on a hub?

Quoted message said:

Can a 135mm rear spacing be changed to 130mm? If yes...what does this
entail?

Owen

Consult the guru:
http://sheldonbrown.com/frame-spacing.html

I've done the opposite on both frames and hubs (130mm to 135mm, that
is). It's quite easy, actually, even if you have minimal mechanical
experience. There are some gotchas, though, which are explained in
detail in Sheldon's article.

Jeff

Ozark Bicycle said:

Quoted message said:

Can a 135mm rear spacing be changed to 130mm? If yes...what does this
entail?

Quoted message said:

Owen

On a frame? What is the frame material?

Or on a hub?

I was actually thinking of changing the spacing of the hub/ locknuts/
axle. My frame is steel.

Owen

JeffWills said:

Quoted message said:

Can a 135mm rear spacing be changed to 130mm? If yes...what does this
entail?

Quoted message said:

Owen

Consult the guru:http://sheldonbrown.com/frame-spacing.html

I've done the opposite on both frames and hubs (130mm to 135mm, that
is). It's quite easy, actually, even if you have minimal mechanical
experience. There are some gotchas, though, which are explained in
detail in Sheldon's article.

Jeff

Thanks for Sheldon's link on this. I was not thinking about spreading
the frame. Is this the best way for me to use 135mm hubs in my older
(1998) steel 7 speed frame?

Owen

My frame spacing is 130mm

Owen

To clarify... I'm wanting to use the latest Shimano Deore XT disc
brake hubs (with 135mm spacing) on my steel frame road bike (with
130mm spacing). I was thinking that I might be able to remove a 5mm
shim, adjust the axle and cut off the excess axle length. Is that
possible with this rear hub?

Owen

Quoted message said:

My frame spacing is 130mm

Owen

The general wisdom is that it's fine to use a 135 hub in a 130 steel
frame. (Al is probably fine too, but the discussion gets broader etc).
If you take this route, it's good to check and correct the dropout
alignment first as running with the wider hub crammed in will make it
just a bit worse.

In the long run, it probably makes more sense to just respace the
frame now. Less fatigue on the dropouts and more convenient wheel
installation/removal. Another cool thing about this is that you get to
make the rear triangle alignment perfect in the process. The dropouts
should always get aligned after you're done.

There's quite a bit more to think about re: reducing a 135 hub to 130
than vice versa. First of all, it's more or less not gonna happen with
a nonstandard-axle hub unless it's one of a very few that you can get
different length endcaps for. Of what's left, it's not gonna work with
anything that has a parallax-style contact seal, as the seal usually
extends all the way to just under the left locknut. What's left after
that is mostly low end Shimano and similar - that's where you can just
remove/replace spacers as much as you want. And even there, if you did
remove the 5mm on the left (it basically has to all come off the left,
as you don't have any clearance on the right to play with) the left/
right spoke tension disparity would end up being worse than any actual
130 hub because the left flange is going to be so far out. (By the
same token, using 130 Shimano road hubs respaced to 135 on bikes that
don't need mtb hubs is a totally awesome thing to do, because combined
with an asymetric rim you can get a nearly dishless 8/9/10 speed
setup, and the reduced lateral strength doesn't seem to matter.)

If the specific goal is to use a new, nice quality mtb hub in a 130
bike that's already set up for 7spd, the good way of doing it would be
putting a 7 speed freehub body on whatever new shimano hub you want,
although I'm not sure about new xtr. The world is also very full of
old high-quality good condition 130 7spd hubs rotting away in bins.

You'll probably need a shorter axle and possibly a smaller spacing washer
unless there is a washer of 5mm that can be removed. If you try to keep the
original axle it will, depending on the thickness of the dropouts, probably
stick out so far that the quick release won't clamp on the dropout properly.

The wheel will also need redishing if the hub is already spoked up.

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

Quoted message said:

Can a 135mm rear spacing be changed to 130mm? If yes...what does this
entail?

Quoted message said:

On Jul 16, 12:18 am, Ozark Bicycle

Quoted message said:

On Jul 15, 11:00 pm, [email hidden] wrote:

Quoted message said:

Quoted message said:

Can a 135mm rear spacing be changed to 130mm? If yes...what does this
entail?

Quoted message said:

Quoted message said:

Owen

Quoted message said:

On a frame? What is the frame material?

Quoted message said:

Or on a hub?

I was actually thinking of changing the spacing of the hub/ locknuts/
axle. My frame is steel.

Owen

Depends on the hub. Taking 5mm of spacers off the left and raising the
tension on the right may make for a problematic wheel. May not have
enough space on the right to remove spacers.

Quoted message said:

To clarify... I'm wanting to use the latest Shimano Deore XT disc
brake hubs (with 135mm spacing) on my steel frame road bike (with
130mm spacing). I was thinking that I might be able to remove a 5mm
shim, adjust the axle and cut off the excess axle length. Is that
possible with this rear hub?

Owen

Again, may cause the cogs to be to close to the frame on the right OR
moves the disc somewhere so that it isn't lined up wth the caliper.

Quoted message said:

Ozark Bicycle said:

Quoted message said:

Can a 135mm rear spacing be changed to 130mm? If yes...what does this
entail?
Owen

On a frame? What is the frame material?

Or on a hub?

I was actually thinking of changing the spacing of the hub/ locknuts/
axle. My frame is steel.

Owen

depends on the hub. lower down you say it's shimano. theoretically,
you can remove a spacer on the left side, but that creates problems with
the seal. i think you're better off using the wheel as-is or better
yet, using a road hub/wheel in the frame.

Quoted message said:

Can a 135mm rear spacing be changed to 130mm? If yes...what does this
entail?

Owen

The most flexible solution is to respace your frame to 132.5mm. You
can then use both size hubs without modification. Specialized does
this with their Al road bikes so it should be no problem with steel.

Quoted message said:

Can a 135mm rear spacing be changed to 130mm? If yes...what does this
entail?

A spoke's breadth on each side?

It's a trivial change to a steel or ti frame but may be significant to
carbon, aluminum rear ends. What is it?

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

Nate Knutson said:

Quoted message said:

My frame spacing is 130mm

Quoted message said:

Owen

The general wisdom is that it's fine to use a 135 hub in a 130 steel
frame. (Al is probably fine too, but the discussion gets broader etc).
If you take this route, it's good to check and correct the dropout
alignment first as running with the wider hub crammed in will make it
just a bit worse.

In the long run, it probably makes more sense to just respace the
frame now. Less fatigue on the dropouts and more convenient wheel
installation/removal. Another cool thing about this is that you get to
make the rear triangle alignment perfect in the process. The dropouts
should always get aligned after you're done.

There's quite a bit more to think about re: reducing a 135 hub to 130
than vice versa. First of all, it's more or less not gonna happen with
a nonstandard-axle hub unless it's one of a very few that you can get
different length endcaps for. Of what's left, it's not gonna work with
anything that has a parallax-style contact seal, as the seal usually
extends all the way to just under the left locknut. What's left after
that is mostly low end Shimano and similar - that's where you can just
remove/replace spacers as much as you want. And even there, if you did
remove the 5mm on the left (it basically has to all come off the left,
as you don't have any clearance on the right to play with) the left/
right spoke tension disparity would end up being worse than any actual
130 hub because the left flange is going to be so far out. (By the
same token, using 130 Shimano road hubs respaced to 135 on bikes that
don't need mtb hubs is a totally awesome thing to do, because combined
with an asymetric rim you can get a nearly dishless 8/9/10 speed
setup, and the reduced lateral strength doesn't seem to matter.)

If the specific goal is to use a new, nice quality mtb hub in a 130
bike that's already set up for 7spd, the good way of doing it would be
putting a 7 speed freehub body on whatever new shimano hub you want,
although I'm not sure about new xtr. The world is also very full of
old high-quality good condition 130 7spd hubs rotting away in bins.

Thank you for taking the time to explain these things to me, Nate. I'm
going to spread the frame, as you recommend, and check it's alignment
too, again... as you have suggested. Will I be able to realign the
dropouts by carefully rebending them with an adjustable spanner
(crescent wrench) or do i need a more exotic set of tools for that
purpose?

Owen

NickP said:

You'll probably need a shorter axle and possibly a smaller spacing washer
unless there is a washer of 5mm that can be removed. If you try to keep the
original axle it will, depending on the thickness of the dropouts, probably
stick out so far that the quick release won't clamp on the dropout properly.

The wheel will also need redishing if the hub is already spoked up.

<[email hidden]> wrote in message

news:[email hidden]...

Quoted message said:

Can a 135mm rear spacing be changed to 130mm? If yes...what does this
entail?- Hide quoted text -

- Show quoted text -

Thanks, Nick... because of the pains involved, which you've shared,
I'm going to go ahead and spread the frame.

Owen

On Jul 16, 8:12 am, Qui si parla Campagnolo <[email hidden]>

Quoted message said:

Quoted message said:

On Jul 16, 12:18 am, Ozark Bicycle

Quoted message said:

Quoted message said:

On Jul 15, 11:00 pm, [email hidden] wrote:

Quoted message said:

Quoted message said:

> Can a 135mm rear spacing be changed to 130mm? If yes...what does this
> entail?

Quoted message said:

Quoted message said:

> Owen

Quoted message said:

Quoted message said:

On a frame? What is the frame material?

Quoted message said:

Quoted message said:

Or on a hub?

Quoted message said:

I was actually thinking of changing the spacing of the hub/ locknuts/
axle. My frame is steel.

Quoted message said:

Owen

Depends on the hub. Taking 5mm of spacers off the left and raising the
tension on the right may make for a problematic wheel. May not have
enough space on the right to remove spacers.- Hide quoted text -

- Show quoted text -

Thank you for your explanation... I could not see this in my own mind,
but now it makes sense.

Owen

jim beam said:

Quoted message said:

Ozark Bicycle said:

On Jul 15, 11:00 pm, [email hidden] wrote:

Quoted message said:

Quoted message said:

> Can a 135mm rear spacing be changed to 130mm? If yes...what does this
> entail?
> Owen
On a frame? What is the frame material?

Quoted message said:

Quoted message said:

Or on a hub?

Quoted message said:

I was actually thinking of changing the spacing of the hub/ locknuts/
axle. My frame is steel.

Quoted message said:

Owen

depends on the hub. lower down you say it's shimano. theoretically,
you can remove a spacer on the left side, but that creates problems with
the seal. i think you're better off using the wheel as-is or better
yet, using a road hub/wheel in the frame.- Hide quoted text -

- Show quoted text -

Thank you for your informative reply. It helped me decide to spread
the frame instead of messing with the hub particulars.

Owen

amakyonin said:

Quoted message said:

Can a 135mm rear spacing be changed to 130mm? If yes...what does this
entail?

Quoted message said:

Owen

The most flexible solution is to respace your frame to 132.5mm. You
can then use both size hubs without modification. Specialized does
this with their Al road bikes so it should be no problem with steel.

Thank you for sharing this info with me. It has encouraged me to try
to spread the frame, myself.

Owen

A Muzi said:

Quoted message said:

Can a 135mm rear spacing be changed to 130mm? If yes...what does this
entail?

A spoke's breadth on each side?

It's a trivial change to a steel or ti frame but may be significant to
carbon, aluminum rear ends. What is it?

--
Andrew Muziwww.yellowjersey.org
Open every day since 1 April, 1971

Yes, the frame in question is steel. Thanks for your encouraging
input.

Owen