Wheelbuilding / Wheel Building / Wheel build help

does that?

AFAIK, it does.

274 it is!

Is there any reason I shouldn't rebuild a disc rim that's done 70,000 km onto a new hub.

What's the failure mode for disc rims?

Got some light bicycle rims.

Asymmetrical, which I thought would be a zig zag spoke hole drilling pattern.

All holes are on one side of the rim.

Is this a mistake? I see this can work on a rear wheel, so should I have bought a different rim for the front?

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Which rim in particular is it?

Is it a truly asymmetric rim, because it looks like just a standard rim with the drilling to the side.

They've got a MTB rim that is truly asymmetric which makes sense for disc brake hubs

Asymmetric refers to the rim profile (offset) and not to the drilling

XC923

Ok. So I build the rear with offset holes on the drive side? What about the front?

Non-drive. The idea is that the offset makes for a 'better triangle' and thus the wheel will be more beefy. Asymmetric on the front is pointless but I think tester pointed out earlier that you won't die from building a front wheel with an asymmetric rim

Asymmetric on the front is pointless but I think tester pointed out earlier that you won't die from building a front wheel with an asymmetric rim

That's what I thought, but then I decided he must want it to go with a disc brake hub. Surely the same justification for the back wheel applies to a front wheel with a disk hub? I guess it doesn't take quite as much as weight and won't flex in corners etc.?

Surely the same justification for the back wheel applies to a front wheel with a disk hub?

Yes, but the problem is less dramatic due to the smaller difference between left and right flange offsets. Apart from the slight inconvenience while building, disc fronts with non-offset rims and non-disc fronts with offset rims will both be fine, in the sense that if you're really running that close to design optimisation on a front wheel that it will make a material difference, you should probably consider adding a bit more safety margin.

In a rare example of something new actually being an improvement, Boost™ can actually solve the problem for front disc hubs.

@Heldring @frankenbike thank you for the feedback. I'm learning here.

@mdcc_tester

The slight inconvenience, I take, is a different spoke length, for an otherwise nice smooth build with same spoke length on a symmetrical rim?

The slight inconvenience, I take, is a different spoke length

For symmetrical hubs laced to asymmetrical rims, yes.

For asymmetric hubs laced to symmetrical rims, it might not even amount to that because although that can lead to a difference in spoke length from side to side, it might not if the hub designer has made the flange diameters different, and using an asymmetric rim will only yield equal length spokes if it's just the right offset and the hub wasn't already designed to use equal length spokes in a symmetrical rim.

Are you secretly Sheldon Brown, having faked your own death?

It's amazing, isn't it.

@mdcc_tester
The front hub is a Tune disc hub for RS 1 predictive steering. Am I looking at another box of spokes for this build?

PSA. i run a bikeshop training program for recovering addicts. Have build many regular wheels. For these anomalies I have questions. Thank you for your time.

front hub is a Tune disc hub for RS 1 predictive steering. Am I looking at another box of spokes for this build?

I have no idea what you already have, so who knows? The Tune King Kong PS uses equal theoretical length spokes if the rim offset is 5.4mm. Zero offset makes the theoretical length difference about 1.3mm.

Interesting tidbit from the Tune manual. I assume as they mention it some people must be doing it, has anybody seen any examples?

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I think either Jobst Brandt or Damon Rinard concluded that there was no measurable benefit to the wheel structure, but I suppose tethering a broken spoke might be worthwhile on an XC race bike where you might have to ride it for a long time before getting a replacement.

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I think either Jobst Brandt or Damon Rinard concluded that there was no measurable benefit to the wheel structure

That was what I understood, but Gerd Schraner thinks otherwise...

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Gerd Schraner thinks otherwise

How many wheels actually fail half way up the spokes where they rub on one another? If you think it's really an issue, there are straight pull designs which don't let the spokes touch at the crossing anyway :) The whole article reads like a "just so" story, I bet the next paragraph explains why tied and soldered wheels are vertically compliant but laterally rigid :)

I was taught how to do it when I did my cytech bollocks, but was also told it was pointless and have never done it since.

If you think...

I don't.

I just parrot the opinions of others relying on the fact that more often than not, whoever is listening knows even less than me.

You're somewhat skewing my batting average though.

are there any 18h wide alu rims that are less than £50 each?

new bladed spokes Radial FW Side 32h

Those Exalith Open Pro Rims.

Are they just vapourware?