Need Source for OEM style rims.

Steverino · Post by **Steverino** » Sun Mar 08, 2015 5:47 pm

I'm looking for new oem style chrome steel rims for my CB77. I've not had the best luck with Thailand Suppliers. If you have a good supplier, let me know.
Thank You
Steve

cknight · Post by **cknight** » Wed Apr 29, 2015 9:35 am

Following up on Steve's encounters, it is really difficult to find proper replacement CB72/77 rims. Some questions you might want to ask the potential supplier are: Diameter - 18"; Number of spokes - 36; Width - front 1.60" (or WM1), rear 1.85" (or WM2); Spoke angle - 41 degrees (VERY IMPORTANT:CB160 and other small diameter hubs are about 22 degrees, and won't function properly). If the answers are not correct, or aren't replied to, it would be best to stay away. Rechroming stock rims is an excellent choice. It might seem expensive, but buying, shipping, and assembling incorrect rims and having to start over again isn't cheap either. Regards, Chase

G-Man · Post by **G-Man** » Wed Apr 29, 2015 3:41 pm

Chase

The difference between 22 and 41 degrees seems massive considering the small difference between the size of a CB160 hub and a CB72 hub. Are you sure?

G

cknight · Post by **cknight** » Wed Apr 29, 2015 4:05 pm

I received those figures from a well known wheel builder. Verified them against my CB77 wheels, and 41 looked correct as I measured them. I do not have any 160 wheel assemblies to check for the 22 degree figure. Regards, Chase

G-Man · Post by **G-Man** » Wed Apr 29, 2015 4:13 pm

Chase

Because the CB72 and CB160 rims are so often mistaken for each other I would think that the difference is only a couple of degrees.

http://www.central-wheel.co.uk/rims/rim ... edure.html

G

cknight · Post by **cknight** » Thu Apr 30, 2015 9:08 am

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

Steverino · Post by **Steverino** » Sat May 02, 2015 2:26 am

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