Taco'd wheel

evenen all,

had to happen eventually. front wheel is taco'd =/

i've stripped the wheel down and straightened it a lot and rebuilt it
from the hub up, but its still not quite there yet... its an aluminium
single walled 700C.

what the likelyhood that if i persist it'll get round and true?
should i just go for a new rim and let it be?

cheers,

kim
~ what is it with prados in this town?

On 02/11/05 at 18:48:12 Kim Hawtin somehow managed to type:

<snip>

Quoted message said:

what the likelyhood that if i persist it'll get round and true?
should i just go for a new rim and let it be?

Go for a new rim.

Almost anything can be pulled round and true BUT it'll not stay that
way for long and will probably eat spokes at an alarming rate.

--
Humbug

On 02/11/05 at 18:48:12 Kim Hawtin somehow managed to type:

<snip>

Quoted message said:

what the likelyhood that if i persist it'll get round and true?
should i just go for a new rim and let it be?

Go for a new rim.

Almost anything can be pulled round and true BUT it'll not stay that
way for long and will probably eat spokes at an alarming rate.

--
Humbug

Humbug said:

On 02/11/05 at 18:48:12 Kim Hawtin somehow managed to type:

<snip>

Quoted message said:

what the likelyhood that if i persist it'll get round and true?
should i just go for a new rim and let it be?

Go for a new rim.

Almost anything can be pulled round and true BUT it'll not stay that
way for long and will probably eat spokes at an alarming rate.

--
Humbug

Hang on, that smells a little fishy... rims are pretty flexible, especially from side to side when there are no spokes to hold them still. If the rim doesn't have a bad kink, it should true up pretty well. You just need plenty of tension (which doesn't kill spokes - too much tension pulls the nipple through the rim, so too much tension will kill a rim before it kills spokes...)

Don't spend money unless you must!

Ritch

Humbug said:

On 02/11/05 at 18:48:12 Kim Hawtin somehow managed to type:

<snip>

Quoted message said:

what the likelyhood that if i persist it'll get round and true?
should i just go for a new rim and let it be?

Go for a new rim.

Almost anything can be pulled round and true BUT it'll not stay that
way for long and will probably eat spokes at an alarming rate.

--
Humbug

Hang on, that smells a little fishy... rims are pretty flexible, especially from side to side when there are no spokes to hold them still. If the rim doesn't have a bad kink, it should true up pretty well. You just need plenty of tension (which doesn't kill spokes - too much tension pulls the nipple through the rim, so too much tension will kill a rim before it kills spokes...)

Don't spend money unless you must!

Ritch

ritcho said:

Humbug said:

Kim said:

what the likelyhood that if i persist it'll get round and true?
should i just go for a new rim and let it be?

Go for a new rim.

pah!

Quoted message said:

Quoted message said:

Almost anything can be pulled round and true BUT it'll not stay that
way for long and will probably eat spokes at an alarming rate.

maybe. but i might as well try 😉

Quoted message said:

Hang on, that smells a little fishy... rims are pretty flexible,
especially from side to side when there are no spokes to hold them
still. If the rim doesn't have a bad kink, it should true up pretty
well.

well i just had another crack at it. lots better now 😉

Quoted message said:

You just need plenty of tension (which doesn't kill spokes - too
much tension pulls the nipple through the rim, so too much tension will
kill a rim before it kills spokes...)

need to get some replacement nipples me thinks.

Quoted message said:

Don't spend money unless you must!

hmmm ... guess what my problem was?

off by one. thats right the damn spokes were one off in the hub.
pulled out all the leading spokes on one side, then moved all the
trailing spokes back one hole, then put back in all the leading
spokes... t'was much better. so did the same for the other side of the
wheel! YAAAAY!

now, thats the wheel building done... now for a gentle art of wheel truing!

cheers,

Kim
~ thats about 9 times that wheel has been despoked and laced up in two days!

ritcho said:

Humbug said:

Kim said:

what the likelyhood that if i persist it'll get round and true?
should i just go for a new rim and let it be?

Go for a new rim.

pah!

Quoted message said:

Quoted message said:

Almost anything can be pulled round and true BUT it'll not stay that
way for long and will probably eat spokes at an alarming rate.

maybe. but i might as well try 😉

Quoted message said:

Hang on, that smells a little fishy... rims are pretty flexible,
especially from side to side when there are no spokes to hold them
still. If the rim doesn't have a bad kink, it should true up pretty
well.

well i just had another crack at it. lots better now 😉

Quoted message said:

You just need plenty of tension (which doesn't kill spokes - too
much tension pulls the nipple through the rim, so too much tension will
kill a rim before it kills spokes...)

need to get some replacement nipples me thinks.

Quoted message said:

Don't spend money unless you must!

hmmm ... guess what my problem was?

off by one. thats right the damn spokes were one off in the hub.
pulled out all the leading spokes on one side, then moved all the
trailing spokes back one hole, then put back in all the leading
spokes... t'was much better. so did the same for the other side of the
wheel! YAAAAY!

now, thats the wheel building done... now for a gentle art of wheel truing!

cheers,

Kim
~ thats about 9 times that wheel has been despoked and laced up in two days!

On 2005-11-02, ritcho (aka Bruce)
was almost, but not quite, entirely unlike tea:

Quoted message said:

Humbug said:

On 02/11/05 at 18:48:12 Kim Hawtin somehow managed to type:

Quoted message said:

what the likelyhood that if i persist it'll get round and true?
should i just go for a new rim and let it be?

<snip whinge about prado>

Quoted message said:

Don't spend money unless you must!

Or unless the Prado responsible is paying for it.

--
TimC
Memory fault -- core...uh...um...core... Oh dammit, I forget!

On 2005-11-02, ritcho (aka Bruce)
was almost, but not quite, entirely unlike tea:

Quoted message said:

Humbug said:

On 02/11/05 at 18:48:12 Kim Hawtin somehow managed to type:

Quoted message said:

what the likelyhood that if i persist it'll get round and true?
should i just go for a new rim and let it be?

<snip whinge about prado>

Quoted message said:

Don't spend money unless you must!

Or unless the Prado responsible is paying for it.

--
TimC
Memory fault -- core...uh...um...core... Oh dammit, I forget!

TimC said:

ritcho said:

Humbug Wrote:
Don't spend money unless you must!

Or unless the Prado responsible is paying for it.

the brstrd didn't see me nor did she stop.
i 'conveniently' found a gutter and curb instead of bumper.
given the wheel is now mostly round, i'm not so worried.
have number plate. lives in my burb. only a matter of time.

kim

TimC said:

ritcho said:

Humbug Wrote:
Don't spend money unless you must!

Or unless the Prado responsible is paying for it.

the brstrd didn't see me nor did she stop.
i 'conveniently' found a gutter and curb instead of bumper.
given the wheel is now mostly round, i'm not so worried.
have number plate. lives in my burb. only a matter of time.

kim

Kim Hawtin said:

had to happen eventually. front wheel is taco'd =/

What do you get when you cross a mountain bike with a motor bike?

tinyurl.com9773nOpen ↗
OR
thehippy.netMVI 4201.AVIOpen ↗

Final batch of tour pics up:
thehippy.netindex.phpOpen ↗

hippy

On 02/11/05 at 22:11:29 ritcho somehow managed to type:
<snip>

Quoted message said:

Hang on, that smells a little fishy... rims are pretty flexible,
especially from side to side when there are no spokes to hold them
still. If the rim doesn't have a bad kink, it should true up pretty
well. You just need plenty of tension (which doesn't kill spokes - too
much tension pulls the nipple through the rim, so too much tension
will kill a rim before it kills spokes...)

Rims may be pretty flexible but if it's been taco'd it's been deformed
beyond its elasticity and will remain permanently deformed. Yes, you
_can_ lace it up and tension it so that it runs true but because the
underlying defect (it's bent) is still there it'll try and get into its
proper (but bent) shape. The end result is REALLY uneven spoke tension
which will, depending on how deformed the rim is, result in a wheel
that doesn't stay true and one which will break a lot more spokes than
you'd expect.

Quoted message said:

Don't spend money unless you must!

And of course spending money when you don't have to (apart from
spending it on beer 'n bikes 'n parachutes of course) is most certainly
NOT ON.

--
Humbug
BE A LOOF! (There has been a recent population explosion of lerts.)

Humbug said:

On 02/11/05 at 22:11:29 ritcho somehow managed to type:
<snip>

Quoted message said:

Hang on, that smells a little fishy... rims are pretty flexible,
especially from side to side when there are no spokes to hold them
still. If the rim doesn't have a bad kink, it should true up pretty
well. You just need plenty of tension (which doesn't kill spokes - too
much tension pulls the nipple through the rim, so too much tension
will kill a rim before it kills spokes...)

Rims may be pretty flexible but if it's been taco'd it's been deformed
beyond its elasticity and will remain permanently deformed. Yes, you
_can_ lace it up and tension it so that it runs true but because the
underlying defect (it's bent) is still there it'll try and get into its
proper (but bent) shape. The end result is REALLY uneven spoke tension
which will, depending on how deformed the rim is, result in a wheel
that doesn't stay true and one which will break a lot more spokes than
you'd expect.

Quoted message said:

Don't spend money unless you must!

And of course spending money when you don't have to (apart from
spending it on beer 'n bikes 'n parachutes of course) is most certainly
NOT ON.

--
Humbug
BE A LOOF! (There has been a recent population explosion of lerts.)

As you say, it depends on how bad the rim is deformed. Spokes need to be as tight as they can go, without pulling through the rim. If they are too loose, they will go slack when the wheel unloads. A bent rim will require uneven spoke tension. The wheel will perform perfectly well as long as relatively loose spokes are still tightened sufficiently such that they don't go slack when the wheel unloads. This clearly depends on the rim's condition.

As long as tension is sufficient in all spokes such that they don't unscrew themselves or go completely slack, such a wheel will perform as well as any other wheel.

Ritch

Kim Hawtin said:

evenen all,

had to happen eventually. front wheel is taco'd =/

i've stripped the wheel down and straightened it a lot and rebuilt it
from the hub up, but its still not quite there yet... its an aluminium
single walled 700C.

what the likelyhood that if i persist it'll get round and true?
should i just go for a new rim and let it be?

cheers,

kim
~ what is it with prados in this town?

It's always going to a [censored] wheel from now on, but truing it will give you lots of practise on a wheel that doesn't matter.

Then cut all the spokes with an angle grinder and buy a new rim.... (yes. I know it's excessive, but angle grinders are a lot of fun).