Dish when building offset rim
 

Hi everyone,

I just laced up an a23 OC (3.3mm offset), and was wondering if the offset will affect the dish? When the wheel is properly tensioned, should the dish also be 3.3mm offset on the DS, or should the dish be even on both sides?

The rim should *always* be centered between the dropouts.
It does not matter if the rim is an O/C or not.

The reason for offset drilling is to reduce the spoke tension differential (or spoke dish) while leaving the rim in the center of the axle.

Once you understand that, then you'll see that you put the spoke hole side of the rim toward the left, or farther from the right, and closer to the left flange.

BTW- don't forget to add/subtract the amount of offset from the CTF dimensions you enter in the spoke calculator.

Yep. Simple rule that will always get you to the right conclusion.

Not quite if we're speaking about a rim spoke holes offset to one side, (not centered zigzag) as the OP seems to be.

The OP specifically asked which side the spoke holes should be offset to.

No, I'm just wondering if I use a dishing tool, it should be the same on either side. And it should, right? (According to previous posts)

If using a dishing tool you are measuring/indicating the position of the rim relative to the hub (actually the outside face of the lock nuts). The only way the spokes figure in this part of the wheel building equation is that they are the mechanism by which you will move the rim relative to the lock nuts...so it does not matter if the rim is drilled centered or offset for the purpose of establishing a properly dished wheel when building the wheel.

The offset drilling comes into play when choosing components to build with as it will have an effect on how much dish a wheel will have, meaning how symetrical or asymetrical the rear wheel will be when finished. This also impacts spoke length. But this has no affect on the process of centering the rim between the locknuts or "dishing" the wheel.

-j

Why shouldn't the rim be centred between the locknuts? Just because the nipples are offset?

The only reason to deliberately have the rim off-centre is if you know how much the aluminium or carbon frame it lives in is skew-iff (if it's a steel frame, you fix the frame instead).

Yes. With the very rare exception of asymmetrical frames, all wheels, front and rear, are built with the rim centered between the axle faces.

uhhh. just for clarity: axle locknut faces...as opposed to the face of the end of the axle which may extend further on one side than the other and has no affect on dish (but can affect the ability to secure the wheel in the frame when using a quick release skewer).

Yes, when I say axle face, I mean the part that bears on the inside of the dropout. I use the term axle face in the interest of brevity, and also because many modern hubs do not have locknuts. I call the ends of axles, the axle's end.

In most cases there's no reason to be pedantic or overly precise because the context makes the meaning clear.