[tnankie]

Greetings all,

DISCLAIMER: This post is about a minor personal niggle that probably makes a gnats dick of a difference, but please indulge me.

I am looking for a front hub to build a new lightish wheel set on. Originally I was looking at a set of DT EX1750’s to give you an idea of what I am aiming for.

Now for my problem. I want a 20mm axle hub. 20mm hubs are a bit wider that QR hubs, I believe its 110mm vs. 100mm. Now an non-disc QR hub is 100mm and has no dish in the spokes, a disc QR is dished to make room for the disc mount. Now I thought the reason for going to 110mm on the thru axle was to go back to a dishless front wheel, can anyone confirm or deny this?

Assuming this is correct, I shall move one. Some 20mm hubs are convertible, I am thinking of Hope right now but I think there are others. These convertible hubs are obviously going to be dished. The problem is that I was told that a lot of non convertible 20mm hubs actually use the same hub body as their QR brethren and hence also build into a dished wheel.

Does anyone know of a 20mm hub that will build into a dishless wheel? I am trying to find some info on Hadley, but I am finding it quite difficult. Or can someone link me a document of the 20mm standard?

 

[sanjuro]

Uh, you have caught a problem that does not exist. If dishless wheels was critical, why don't we use 200mm front axles? Or just throw away the rear wheel?

PS, I use the Hope convertible hub, and so far no problems with spokes with 2mm of difference.

Make
Model
F/R
Axle
Flange L
Flange R
C-to-F L
C-to-F R

Hadley
Disc
front
100mm
56mm
56mm
22.5mm
31.5mm
Hadley
Disc
front
20X110 TA
60mm
60mm
22.6mm
31.4mm
Hadley
SDH disc
rear
135mm
60mm
60mm
33.7mm
20.3mm
Hadley
T-A disc
rear
12X150mm
60mm
60mm
32.4mm
27.8mm
Hadley
S-S B-O disc
rear
135mm
60mm
60mm
32.75mm
32.75mm

 

[tnankie]

posibly, like I said, gnats dick....However there is a reason behind the 150mm rear hub, and thats a dishless rear wheel.

Also since you are getting that extra 10mm wider why not use it? Convertible hus are a compromise.

oh and its not really the difference in spoke length, its the angles and tensions. I think that with an appropriate flange size you could raise the disc side to such a hight that it would match the angle fron the non disc side...

 

[r464]

The only wheels that I have built with 20mm axles have been with the Hope hubs and the Halo Spin Doctor (all convertible).

Any front hub (disc or not, QR or through-axle) could be designed to be dishless. All that would be needed is to move the flanges in to an equal point from center. Moving the flange in will reduce the spoke angle and lose strength in that way, however... So it is not the only consideration.