Need Source for OEM style rims.

G-Man · Post by **G-Man** » Sat May 02, 2015 4:29 am

Chase

That's pretty enlightening. Thank you.

I see how the two angle can be so different now. I'll get you the spoke circle dimensions for the 160.

G

cknight wrote:Hi Graham, spoke angle is the angle between two radial lines drawn from the center of the wheel. One line going to where a spoke is centered in the dimple of the rim, and the other where the other end of that same spoke is centered in the hub flange. In wheel drilling it is a main point of reference. It's one of the dimensions used to calculate the angle that the rim is drilled for the spoke nipples. The rim diameter and the spoke diameter on the hub are other primary reference dimensions (among a few others). It's not the angle that the nipple protrudes from the rim, nor the angle between the spoke and a radial line. As the 160 wheels are also 18", but have a smaller spoke circle, the spokes are longer and "stand up straighter" than on a CB72/77, reducing the spoke angle. In a bit of "less than accurate" tracing using your 160 image, I attempted to guesstimate the spoke angle. Using my trusty plastic protractor, I came up with an angle in the low 20's, so not too far out of reason. Yes, the angle that the nipple comes out of the rim only changes slightly from one rim to the other (after all the calculations are made), but by the time it gets from the rim to the hub, it's a notable change. Hope I haven't made thing more complex. Thanks, Chase

G-Man · Post by **G-Man** » Sat May 02, 2015 4:32 am

Steve

I have part restored some pretty ratty covers. They seem pretty hard to find in tidy condition.

G

Steverino wrote:Thank You G Man and CKnight, and everyone else who contributes to make this such an enjoyable learning experience.
I still can't believe I had a good CB77 rim hiding in my CB160 stuff. I shouldn't be surprised considering the number of times I've bought parts I didn't realize I already had.

G Man, You need side covers for that CB160?
Steve

G-Man · Post by **G-Man** » Sat May 02, 2015 6:22 am

This is a little diagram I made a few years ago so that I could sort my spokes after they came back from plating.

G

G-Man wrote:Chase

That's pretty enlightening. Thank you.

I see how the two angle can be so different now. I'll get you the spoke circle dimensions for the 160.

G

cknight wrote:Hi Graham, spoke angle is the angle between two radial lines drawn from the center of the wheel. One line going to where a spoke is centered in the dimple of the rim, and the other where the other end of that same spoke is centered in the hub flange. In wheel drilling it is a main point of reference. It's one of the dimensions used to calculate the angle that the rim is drilled for the spoke nipples. The rim diameter and the spoke diameter on the hub are other primary reference dimensions (among a few others). It's not the angle that the nipple protrudes from the rim, nor the angle between the spoke and a radial line. As the 160 wheels are also 18", but have a smaller spoke circle, the spokes are longer and "stand up straighter" than on a CB72/77, reducing the spoke angle. In a bit of "less than accurate" tracing using your 160 image, I attempted to guesstimate the spoke angle. Using my trusty plastic protractor, I came up with an angle in the low 20's, so not too far out of reason. Yes, the angle that the nipple comes out of the rim only changes slightly from one rim to the other (after all the calculations are made), but by the time it gets from the rim to the hub, it's a notable change. Hope I haven't made thing more complex. Thanks, Chase

G-Man · Post by **G-Man** » Tue May 05, 2015 1:47 pm

Here are a CB160 and CB72 hub compared. The CB160 spoke circle measures 210mm and the inner and outer spoke flanges are at 36mm and 48mm.

G