Wheelbuilding / Wheel Building / Wheel build help

measure to outside of flange or centre? I would think it's centre, but then that's not where the spokes come out

Do the maths and see how much difference it makes (hint: it's not a lot). If you use the centre, the error on the outbound spokes will be about -0.1mm and the error on the inbound ones will be about +0.1mm

No I figured as much, just sort of wondered what the convention was. The Shimano hub seems to be to the outside, so I guess that's the one.

OK so I raise my hands, I got a nasty rash of compulsive upgrade disease.

I had built for me a 24h front 35mm deep crabon on a dyno hub. Pillar aero spokes, alu nipples. 28h rear on high flange Phil. Tubeless, 28c, yada yada.

When I get out of the saddle to climb the front wheel has tons of lateral flex, so I'm rubbing on the brake pads. Rear wheel has no brake so it may be flexing too.

Wheels (and crabon fork) otherwise have improved the ride's weight and zippiness immeasurably.

Should I just put it down to experience and go back to 32 spokeland where I belong, as an overweight middle aged lazybones?

How much do you weigh? 24 spokes on a 35mm rim should be fine for most weights. Is it disc? Who built the wheel?

Nope, rim is rubbing on rim brake.

About 12-13 stone at a guess.

Wheelbuilder is experienced and reputable. Maybe I should ask him first, perhaps we could up the tension...

About 12-13 stone

Lightweight.

What brand are the rims? Sounds like spoke tension is too low or rims are just very flexy

It's the stiffness of the rim that makes it more likely to rub; a shallow alloy rim flexes more at the bottom and transmits less deflection to the top of the wheel by the brakes.

http://www.bikeradar.com/road/gear/article/bicycle-brake-rub-wheels-vs-frame-49344/

Sounds like spoke tension is too low

No. The wheel does not become stiffer from more tension.
http://www.sheldonbrown.com/rinard/wheel_index.html
http://www.slowtwitch.com/Tech/Debunking_Wheel_Stiffness_3449.html

More spokes, thicker spokes or a hub with wider flanges would help.
What hub is it built on?

Edit: Or it could be the quick release holding the wheel....

Need black kinlin x31t disk rims for a build in 28 hole . Who is selling in the uk, they will go on hope pro 4

Malcolm at the clinic has them so he got my order.

@dubtap Interesting

@svendhöek

More spokes, thicker spokes or a hub with wider flanges would help.
What hub is it built on?

Edit: Or it could be the quick release holding the wheel....

The only option I can attempt is thicker spokes. Hub is Shutter Precision 9series, has quite a lot of spacing either side of flanges, symmetrically, accomodate electrical connectors.

Will double check the qr... cheers for input

@Turkish rim is from Lightweight Bicycle - generally regarded as good.

Trying to calculate spoke lengths for Mack superlight low flange hubset to these rims. I can't find the dimensions of the hubs online - anybody been through this or have the info?

Get some verniers and measure yourself. Id never trust any hub dimensions I find online. I could also measure my set of lf macks if you like but cant guarantee theyre the same as yours obviously

Hub is Shutter Precision 9series, has quite a lot of spacing either side of flanges

As well as the closely spaced flanges, which hurt wheel axial stiffness, the long unsupported axle probably flexes quite a bit compared with a hub which has the bearings within shouting distance of the dropouts.

@Skülly

It's quite interesting that you wouldn't ask me directly, but hey.

Most dynamos, apart from schmidt deluxe wide body havequite crappy flange spacing and bearings sitting very near the centre of the hub. Hence the flex of the wheel.

Sven is probably right. Try a shimano close cam skewer

Thanks man - I was hoping to order everything online in one go but yeah, probably better to just get the hubs first..although @arup was telling me the ERD has a much bigger effect on spoke length anyway. FYI I'm getting rims and spokes from Far Sports.

@broken_777 Oh dear. Perhaps you're right, but as I see it the fault is with the parts choice (mine) not wheel-build. Apols if this^...^ seemed odd! Only got good vibes in your direction dude.

Most dynamos, apart from schmidt deluxe wide body havequite crappy flange spacing and bearings sitting very near the centre of the hub. Hence the flex of the wheel.

So yes it seems the hub may well be the root of this. Shoulda got a schmidt.

re: the skewer being the problem, it's a pretty nice chunky Salsa thing, can't see why / where that could contribute.

Think I'll do some longer rides as it is and see how bad it really is over a day.

Then probably start again with a schmidt. ££££ arrg

The salsa skewers are still open cam. Worth testing a closed cam if you have one lying around. Ive noticed a massive difference in wheel stiffness going from open to closed cam before

Not sure what the difference is, @Turkish, can you enlighten me? No technical drawings required...

http://forums.roadbikereview.com/general-cycling-discussion/open-cam-closed-cam-lawyer-tabs-etc-172125.html#post2153757

Top, not bottom:

tl/dr
Shimano or Campag.

where is @Skülly and what have you done with him?

Not sure what the difference is

Higher clamping force. The theory is that off centre axial loads on the wheel which want to rock the lock nuts on the dropout faces and splay the fork ends apart can do so if they exceed the preload generated by skewer tension. While this isn't technically wheel flex, it has the same effect because the fork flex allows wheel displacement, which makes the brake rub.

It does seem a bit odd. And a little amusing. But hey. All is well.

As it stands now, wide body Schmidt deluxe only comes in 28-32 holes.

Rebuilding with thicker spokes is pretty pointless too, as pillar 1422 are made from 1.65mm blanks. Max allowed on LB rims is 1.8mm. Not much improvement here.

Solution A - close cam skewer.
Solution B-not sure how close you are running your pads to the rim, you can potentially run the caliper a bit more open. Which may also improve stopping power.