Drum Brake: "Drive" Side?

(PeteCresswell) said:

Lacing instructions I see refer to a wheel's "Drive" side.

When lacing a wheel with a front hub brake, would the side the
reaction arm is on be the "Drive" side?

With traditional front drum brakes, the hub is oriented so that the
reaction arm pivots at the front and extends rearward, to lessen the
chance of it snagging on anything untoward.
~

(PeteCresswell) said:

Lacing instructions I see refer to a wheel's "Drive" side.

When lacing a wheel with a front hub brake, would the side the
reaction arm is on be the "Drive" side?
--
PeteCresswell

No. At least not on my Sturmey-Archer X-FDD. The cable goes behind the
fork blade.

(PeteCresswell) said:

Lacing instructions I see refer to a wheel's "Drive" side.

When lacing a wheel with a front hub brake, would the side the
reaction arm is on be the "Drive" side?

For lacing wheels with hub brakes of any kind it should not matter.

quote='_'On Wed said:

Lacing instructions I see refer to a wheel's "Drive" side.

When lacing a wheel with a front hub brake, would the side the
reaction arm is on be the "Drive" side?

For lacing wheels with hub brakes of any kind it should not matter.[/QUOTE]

Torque is torque whether it's propelling or braking. Since there is a fairly well established consensus about the best lace to deal with propelling torque, why shouldn't the same line of reasoning be applicable to how to best deal with braking torque?

With that said, I don't expect it to have a critical influence.

(PeteCresswell) said:

Lacing instructions I see refer to a wheel's "Drive" side.

When lacing a wheel with a front hub brake, would the side the
reaction arm is on be the "Drive" side?
--
PeteCresswell

Drive side is simply a handy reference which for a rear wheel is more definite than "left" or "right". I suppose the reference could be extended to cover the front wheel too, but it wouldn't be as strikingly obvious as for the rear.

I haven't looked at enough hub brakes with reaction arms to say if there is any informal standard concerning their design and location, but from a pure engineering standpoint they could be placed at either side of either leg of the fork with minor mechanical consequences.
There should be a small benefit to be gained from the proper orientation of the spokes in terms of leading or trailing, but as far as "drive side" is concerned it's a fairly empty definition for a front brake hub.
If the performance of hub brakes is dependent on the direction of rotation then that too must be addressed to get a complete frame of reference for lacing instructions.

dabac said:

_ said:

(PeteCresswell) said:

Lacing instructions I see refer to a wheel's "Drive" side.

When lacing a wheel with a front hub brake, would the side the
reaction arm is on be the "Drive" side?

For lacing wheels with hub brakes of any kind it should not matter.

Torque is torque whether it's propelling or braking. Since there is a
fairly well established consensus about the best lace to deal with
propelling torque, why shouldn't the same line of reasoning be
applicable to how to best deal with braking torque?

With that said, I don't expect it to have a critical influence.

Because the only effect of propelling torque on cycle wheels is du to
non-symetrical lacing, where the lateral shift of the rim can affect
braking; with hub brakes of any kind, this is not an issue.

_ said:

Because the only effect of propelling torque on cycle wheels is du to
non-symetrical lacing, where the lateral shift of the rim can affect
braking; with hub brakes of any kind, this is not an issue.

What?

#1. You spend a lot of time honking and braking simultaneously?

#2. Ever considered the differences between leading and trailing spokes? Seems that several wheel builders do...

On Wed, 27 Feb 2008 19:19:56 -0500, "(PeteCresswell)" <[email hidden]>

may have said:

Lacing instructions I see refer to a wheel's "Drive" side.

When lacing a wheel with a front hub brake, would the side the
reaction arm is on be the "Drive" side?

I believe they mean the bike's drive side. I'm not sure; I could be
wrong.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.

dabac said:

_ said:

Because the only effect of *propelling torque* on cycle wheels is du
to
non-symetrical lacing, where the lateral shift of the rim *can affect
braking*; with hub brakes of any kind, this is not an issue.

What?

#1. You spend a lot of time honking and braking simultaneously?

Seldom does a cyclist who is propelling wishes to have braking at the same
moment - but non-symetrical lacing can allow this to happen.

Quoted message said:

#2. Ever considered the differences between leading and trailing
spokes? Seems that several wheel builders do...

As long as it is symetrical, there is no real difference.

Wheel builders are not, as we know, siufficient authority to claim
otherwise.

Quoted message said:

Quoted message said:

_ said:

Because the only effect of *propelling torque* on cycle wheels is du
to
non-symetrical lacing, where the lateral shift of the rim *can affect
braking*; with hub brakes of any kind, this is not an issue.

Quoted message said:

dabac said:

What?
#1. You spend a lot of time honking and braking simultaneously?

_ said:

Seldom does a cyclist who is propelling wishes to have braking at the same
moment - but non-symetrical lacing can allow this to happen.

Quoted message said:

dabac said:

#2. Ever considered the differences between leading and trailing
spokes? Seems that several wheel builders do...

_ said:

As long as it is symetrical, there is no real difference.
Wheel builders are not, as we know, siufficient authority to claim
otherwise.

But we don't make claims. When last discussed here I believe we all
agreed (Sheldon Brown as well) it is a trivial difference and we build
one way or the other from habit mostly.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

A Muzi said:

Quoted message said:

Quoted message said:

_ Wrote:
> Because the only effect of *propelling torque* on cycle wheels is du
> to
> non-symetrical lacing, where the lateral shift of the rim *can affect
> braking*; with hub brakes of any kind, this is not an issue.

Quoted message said:

dabac said:

What?
#1. You spend a lot of time honking and braking simultaneously?

_ said:

Seldom does a cyclist who is propelling wishes to have braking at the same
moment - but non-symetrical lacing can allow this to happen.

Quoted message said:

dabac said:

#2. Ever considered the differences between leading and trailing
spokes? Seems that several wheel builders do...

_ said:

As long as it is symetrical, there is no real difference.
Wheel builders are not, as we know, siufficient authority to claim
otherwise.

But we don't make claims. When last discussed here I believe we all
agreed (Sheldon Brown as well) it is a trivial difference and we build
one way or the other from habit mostly.

I wasn't saying you do; merely that if others do (as stated by "dabac" in
support of his assertion that it DOES make a difference) their being
wheelbuilders does not lend any greater creedence to such a claim.