why do i keep bending my rear wheel!!!:(

Dej said:

this is a "new" wheel, new FIR 36 hole rim, new 105 hub, unknown brand
spokes, built at cecil walker about 6 months ago.
i get home today and notice it needs to be trued yet again, it'll the the
3rd time in 6 months.
im about 88kgs, dont bounce up or down driveways and generally try avoid
bumps...
i had less problems when i was 110kgs🙁
i dont get it🙁
front wheel has never needed to be trued since the day it was built.

After building my own wheels (sneek in own plug - again 🙂 ), my guess is that the rear wheel does not have enough tension.

Highly dished wheels have much more tension on the right than on the left side. The amount of tension you can put on the right side is determined by the strength of the rim. Jobst will tell you that you want to tighten the spokes as tight as possible without pulling the eyelets through the rim.

The left side spokes are comparatively slack. The problem with really tight spokes is that you experience 'wind-up' - the spoke twists with the nipple rather than screwing further into the nipple. When you hit a bump, even a small one, the temporary reduction in tension allows the nipple to slip in the eyelet and you lose trueness.

Another way (that I've heard) is for the (slacker) left side spokes to unscrew in the nipple by themselves. Since they are at pretty low tension, it isn't difficult to unscrew the spoke from the nipple. Sheldon advises _not_ lubricating the threads of spokes on the left side of rear wheels for this reason.

My advice is to buy a spoke wrench and tighten the spokes yourself, taking care to avoid the dreaded wind-up. Sheldon's site has a good description of how tight you need to go, if you don't have a tensiometer (which I also don't have).

Ritch

Dej said:

this is a "new" wheel, new FIR 36 hole rim, new 105 hub, unknown brand
spokes, built at cecil walker about 6 months ago.
i get home today and notice it needs to be trued yet again, it'll the the
3rd time in 6 months.
im about 88kgs, dont bounce up or down driveways and generally try avoid
bumps...
i had less problems when i was 110kgs🙁
i dont get it🙁
front wheel has never needed to be trued since the day it was built.

Sorry I can't really help, but do you know who built it? I don't know
if they only have one guy who builds the wheels, but mine have
done around 1700kms and are dead straight.

I'm around 78kg and I don't care too much about how bumpy a ride
the wheels get, so they tend to go over kerbs and a bit offroad
from time to time. They're Open Pro rims on Campy hubs.

--
Nick

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

Quoted message said:

this is a "new" wheel, new FIR 36 hole rim, new 105 hub, unknown brand
spokes, built at cecil walker about 6 months ago.
i get home today and notice it needs to be trued yet again, it'll the the
3rd time in 6 months.
im about 88kgs, dont bounce up or down driveways and generally try avoid
bumps...
i had less problems when i was 110kgs🙁
i dont get it🙁
front wheel has never needed to be trued since the day it was built.

This should not happen with regular riding. Take them back to CW and tell
them your problem, they should be able to correct it. CW tend to use
quality components and pride themselves on the build. I would expect them
to solve the problem.

Front wheels are usually more robust relative to the loads they take, hence
they rarely need much maintenance if built properly.

Kevin

K&C Russell said:

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

Quoted message said:

this is a "new" wheel, new FIR 36 hole rim, new 105 hub, unknown brand
spokes, built at cecil walker about 6 months ago.
i get home today and notice it needs to be trued yet again, it'll the the
3rd time in 6 months.
im about 88kgs, dont bounce up or down driveways and generally try avoid
bumps...
i had less problems when i was 110kgs🙁
i dont get it🙁
front wheel has never needed to be trued since the day it was built.

This should not happen with regular riding. Take them back to CW and tell
them your problem, they should be able to correct it. CW tend to use
quality components and pride themselves on the build. I would expect them
to solve the problem.

Front wheels are usually more robust relative to the loads they take, hence
they rarely need much maintenance if built properly.

Kevin

I'm in complete agreement. Take your wheels back. They probably need to be retensioned at the least, maybe rebuilt from scratch. Unless you go around riding into potholes and jumping off kerbs...