I've found that riding the Benly for a couple of miles on a flat tyre
has put the rear wheel slightly out of true. There's a tiny bit of axial
distortion (ie: the wheel isn't perfectly round) and a slightly more
significant amount of lateral distortion (ie: the side of the rim
"wobbles")

It's only noticeable at slow (sub-30) speeds, but I suppose I ought to
sort it.

The axial distortion is so slight I don't think it matters - they tyre
will even it out anyway. The lateral distortion needs to be done some
time.

So - who has done this? Who knows how to? or can anyone recommend a good
treatise for DIY or someone close to SW London for the job?

I might even treat the thing to a whole new rim and spoke set.....


--
Trophy 1200 (Doctored) 750SS CB400F CD200 ST70 DT50MX
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 http://www.chateau.murray.dsl.pipex.com/

Mark Olson <(E-Mail Removed)> wrote:

> The Older Gentleman wrote:
> >
> > I've found that riding the Benly for a couple of miles on a flat tyre
> > has put the rear wheel slightly out of true. There's a tiny bit of axial
> > distortion (ie: the wheel isn't perfectly round) and a slightly more
> > significant amount of lateral distortion (ie: the side of the rim
> > "wobbles")
> >
> > It's only noticeable at slow (sub-30) speeds, but I suppose I ought to
> > sort it.
> >
> > The axial distortion is so slight I don't think it matters - they tyre
> > will even it out anyway. The lateral distortion needs to be done some
> > time.
>
> Not to be overly pedantic, but you have confused 'axial' with 'radial'.
>
> IOW, what you are calling "axial distortion" is in fact called 'radial
> runout' and what you refer to 'lateral distortion' is properly called
> 'axial runout'.

Thanks, Mark.

Axial runout is what I want to sort, then.


--
Trophy 1200 (Doctored) 750SS CB400F CD200 ST70 DT50MX
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 http://www.chateau.murray.dsl.pipex.com/

The Older Gentleman wrote:

> The axial distortion is so slight I don't think it matters - they tyre
> will even it out anyway. The lateral distortion needs to be done some
> time.
>
> So - who has done this? Who knows how to? or can anyone recommend a
> good treatise for DIY or someone close to SW London for the job?

I've trued up numerous off-road wheels, & built a couple for the Tiger
from scratch. It's a piece of **** (albeit time consuming) as long as
the spokes aren't seized. If they're old & rusty, take the angle
grinder to them (after taking accurate measurements of the off-set from
both sides) & give Central Wheel a call - you'll be glad you did.

I usually clamp a bar to the swingarm level with the rim, so the end of
the bar's just touching the side of the rim. Spin the wheel to find the
point closest to the bar before tightening the clamp. Then rotate the
wheel & find the point on the rim that's furthest from the bar, loosen
half a turn the 5 or 6 spokes on the opposite side of the wheel that
are closest to this point, then tighten the equivalent 5 or 6 spokes on
the side you're working on by the same amount. Give it another spin to
find the next part that's furthest from the bar (it may be the same
part), & repeat as necessary.

When you've got it so the bar is just touching the rim all the way
round when you spin the wheel, give all the spokes a bash to check they
all 'ring' at roughly the same pitch. Give a final tweak to any that
sound a bit flat.

If you do use new spokes, try to find something that matches the pitch
of the old spokes when you bash them before cutting them out. You'll
know what to aim for when tightening the new ones then.

--
Preston.

http://www.muddystuff.co.uk
Off-road classifieds

'02 MV Senna '96 Tiger '79 Fantic 250
http://groups.yahoo.com/group/uk_tiger_rides

On Sat, 18 Dec 2004 15:26:01 +0000, The Older Gentleman wrote:
8<
>
> So - who has done this? Who knows how to? or can anyone recommend a good
> treatise for DIY or someone close to SW London for the job?
>
> I might even treat the thing to a whole new rim and spoke set.....


It's not easy, getting a wheel exactly true. I found this out recently
when rebuilding a pushbike wheel.

I found this website quite useful:
http://www.sheldonbrown.com/wheelbuild.html

--
Mike
FJ1200 (Porky Torquey)
GTS1000 (Fast Red)

mb <(E-Mail Removed)> wrote:

> On Sat, 18 Dec 2004 15:26:01 +0000, The Older Gentleman wrote:
> 8<
> >
> > So - who has done this? Who knows how to? or can anyone recommend a good
> > treatise for DIY or someone close to SW London for the job?
> >
> > I might even treat the thing to a whole new rim and spoke set.....
>
>
> It's not easy, getting a wheel exactly true. I found this out recently
> when rebuilding a pushbike wheel.
>
> I found this website quite useful:
> http://www.sheldonbrown.com/wheelbuild.html

Bookmarked

Ta.


--
Trophy 1200 (Doctored) 750SS CB400F CD200 ST70 DT50MX
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 http://www.chateau.murray.dsl.pipex.com/

Preston Kemp <(E-Mail Removed)> wrote:

> The Older Gentleman wrote:
>
> > The axial distortion is so slight I don't think it matters - they tyre
> > will even it out anyway. The lateral distortion needs to be done some
> > time.
> >
> > So - who has done this? Who knows how to? or can anyone recommend a
> > good treatise for DIY or someone close to SW London for the job?
>
> I've trued up numerous off-road wheels, & built a couple for the Tiger
> from scratch. It's a piece of **** (albeit time consuming) as long as
> the spokes aren't seized. If they're old & rusty, take the angle
> grinder to them (after taking accurate measurements of the off-set from
> both sides) & give Central Wheel a call - you'll be glad you did.
>
> I usually clamp a bar to the swingarm level with the rim, so the end of
> the bar's just touching the side of the rim. Spin the wheel to find the
> point closest to the bar before tightening the clamp. Then rotate the
> wheel & find the point on the rim that's furthest from the bar, loosen
> half a turn the 5 or 6 spokes on the opposite side of the wheel that
> are closest to this point, then tighten the equivalent 5 or 6 spokes on
> the side you're working on by the same amount. Give it another spin to
> find the next part that's furthest from the bar (it may be the same
> part), & repeat as necessary.
>
> When you've got it so the bar is just touching the rim all the way
> round when you spin the wheel, give all the spokes a bash to check they
> all 'ring' at roughly the same pitch. Give a final tweak to any that
> sound a bit flat.
>
> If you do use new spokes, try to find something that matches the pitch
> of the old spokes when you bash them before cutting them out. You'll
> know what to aim for when tightening the new ones then.

Thanks. I thought I'd give it a go myself, on the basis that it's a
useful skill I'd like to acquire. And if I sod it up, then I'll Get A
Man In.



--
Trophy 1200 (Doctored) 750SS CB400F CD200 ST70 DT50MX
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 http://www.chateau.murray.dsl.pipex.com/

Biker2 (threadstopper) <stevenjill@not_pvl.co.uk> wrote:

> "The Older Gentleman" <(E-Mail Removed)> wrote in
> message news:1gozxag.1parqy91avdqxzN%chateauSPAMKILL.murra (E-Mail Removed)...
> > I've found that riding the Benly for a couple of miles on a flat tyre
> > has put the rear wheel slightly out of true. There's a tiny bit of axial
> > distortion (ie: the wheel isn't perfectly round) and a slightly more
> > significant amount of lateral distortion (ie: the side of the rim
> > "wobbles")
> >
> > It's only noticeable at slow (sub-30) speeds, but I suppose I ought to
> > sort it.
> >
> > The axial distortion is so slight I don't think it matters - they tyre
> > will even it out anyway. The lateral distortion needs to be done some
> > time.
> >
> > So - who has done this? Who knows how to? or can anyone recommend a good
> > treatise for DIY or someone close to SW London for the job?
> >
> > I might even treat the thing to a whole new rim and spoke set.....
>
> I have had four Velo wheels rebuilt by :-
>
> Wheelwise Engineering
> Bolney Road, Cowfold
> Horsham
> Tel; 01403 864533
>
> The proprieter Steve does a great job but its perhaps too far from South
> London for you...
>
Not too bad, actually. Ta.



--
Trophy 1200 (Doctored) 750SS CB400F CD200 ST70 DT50MX
GAGARPHOF#30 GHPOTHUF#1 BOTAFOT#60 ANORAK#06 YTC#3
BOF#30 WUSS#5 http://www.chateau.murray.dsl.pipex.com/

mb wrote:

> It's not easy, getting a wheel exactly true. I found this out recently
> when rebuilding a pushbike wheel.
>
> I found this website quite useful:
> http://www.sheldonbrown.com/wheelbuild.html

I read that yesterday before taking my pushbike wheels
to the local bike shop.
There are times when it is best to trust an expert.

--
Eiron.

"mb" <(E-Mail Removed)> wrote in
news(E-Mail Removed) m...

> It's not easy, getting a wheel exactly true. I found this out recently
> when rebuilding a pushbike wheel.

In my very limited experience, pushbike wheels are much harder
to true than motorcycle ones. That is because they go everywhere
at once as they lack stability.

Rebuilding the XT rear was dead easy and it held up really
well. Get some real good antisize on the spoke threads to
avoid trouble when you need to adjust the wheel. Copaslip
should do, I guess.
I'll do the TTR rear this winter only because a number of
spokes are loose but the nipples are not, IYSWIM. Tried
penetrating oil and heat but no luck.

--
Ole Holmblad - Göteborgs Prima MCK
TDM850 / TT600R FL#44 OTC#489 UKRMSBC#08
SGFPTH#00 Remove hat to answer by mail

On Sat, 18 Dec 2004 19:43:55 +0000, Eiron <(E-Mail Removed)> wrote:

>mb wrote:
>
>> It's not easy, getting a wheel exactly true. I found this out recently
>> when rebuilding a pushbike wheel.
>>
>> I found this website quite useful:
>> http://www.sheldonbrown.com/wheelbuild.html
>
>I read that yesterday before taking my pushbike wheels
>to the local bike shop.
>There are times when it is best to trust an expert.

I got taught by an old codger from my local cycling club to do bike
wheels.

It's definitely an art-form. And quite good fun as well, must get
round to buying a jig.
--
GSXR1000 DIAABTCOD#11 BOTAFOT#75
"We take these risks, not to escape from life,
but to prevent life escaping from us."
http://www.bensales.com