Topic: Is this a 550 wheel?

[Scott S]

 I picked up this wheel as part of the latest haul. I thought it was a 550 wheel, but something about it just looks different. The brake backing plate seems larger/flatter than the early 500/550 style, but not the same as the later K bike style.
 It has a 37T sprocket, which indicates 550. I'm not good at knowing where/how to measure rim width, and there are no stampings in the rim to indicate size.
 Is this a 550 or 750 wheel?

[seanbarney41]

It is not 750, brake plate is a totally different looking casting, plus sprocket side is very different.  37 tooth would be nearly un-rideable on a 750 as stock is 48.  Maybe 350/400? cb450? would be very impressive.

[dave500]

I think the 500 and first gen 550 rear hub had four ribs,the later 550 the ribs were different and used a narrower axle spacer,also the brake plates don't swap into the different ones?ill try and dig up a photo of the later 550 type,can only find the early type.

[jlh3rd]

I don’t see a brake wear indicator, I know it’s on a 550 f....was it on the k ‘s ?

[strynboen]

the indikator is just a bend metal arrov..so can easy be left aut...its absolut not a 400 four..it have thet big Lock ring hold the spoke on

[jlh3rd]

No, it is not a metal arrow...it is an indentation on the actuating lever, red, reddish orange paint in the indentation with a corresponding mark on the shaft support boss... also painted....
And I don’t see it...
...where do people come up with this stuff...

[jlh3rd]

Actually, the mark is on what’s called the brake plate...

[Scott S]

No, it is not a metal arrow...it is an indentation on the actuating lever, red, reddish orange paint in the indentation with a corresponding mark on the shaft support boss... also painted....
And I don’t see it...
...where do people come up with this stuff...

 Some of them had a metal arrow.

[jlh3rd]

No, they didn’t...not the 550.....the 77 had this, still an arrow indentation, not a metal arrow......not painted....

[jlh3rd]

And certainly not easily left off...

[strynboen]

is it a cb 500 t twin..hveel..they used nearly the same as 550..(is there a Lock ring under the metal plate..to hold the spoke in place