Inside of rear wheel, do I need a new one?

[soliecirc]

Sorry, don't even know how to explain it or what it is called. Rivets? Spline? Grooves? It looks worn down though. Should there be grooves or does it not matter? Please look at the pictures and let me know if I need a new wheel.
Thanks for your time and input, I know someone will reply, you guys are great.

[Bob_Roller]

Can you post a picture of what it mates up looks like ?

Not real familiar with the mono shock rear wheels .

[nhmaf]

Yikes, that doesn't look good at any rate.
The twinshock models have a center hub that is riveted to the wheels' brake drum housing, and the center hub has a mating inside spline configuration to  match up with the final drive units' outside spline configuration.   If the monolever wheel design is the same setup, spline-wise, it appears that you badly need a new wheel.

On the twinshock bikes, if one can remove the rivets, one can replace that center splined assembly on the wheel if it is worn out and re-use the wheel.  I cannot see from the pictures that this center part is even removable/replaceable on the monolever wheel.  Hmmm.

[Bob_Roller]

There are four bolts that hold the rear wheel on, you can see the holes in the wheel .

Here's a drawing of the final drive, those are not drive splines from the looks of the drawing .

http://www.realoem.com/bmw/showparts.do?model=0462&mospid=51626&btnr=33_0646&hg=33&fg=05

[tvrla]

That is a monolever wheel and totally different than the twin shocks. The four lug bolts hold the wheel on and needs no drive splines. It's possibly centered by the outside edge of that flange. But if the wheel has been working fine, no oil leaks, brakes don't pulse - I'd take a leap and say there's nothing to worry about.

I haven't had one of those newer models (paralevers, yes, monolevers - the R80G/S - yes) so can't say definitely there's nothing wrong, but I sure don't think so!

[soliecirc]

But if the wheel has been working fine, no oil leaks, brakes don't pulse - I'd take a leap and say there's nothing to worry about.

Thanks for the replies. I'm going with wirespokes on this one being that it has worked fine and there has not been any leaking.

Thanks again

[Ed Miller]

So those splines don't do anything?

[soliecirc]

Not on the monolever models, '85 and later from what I can tell and the feedback I have been getting

[Air4Life]

Okay, this is a little confusing for me.  Does this suggest that the wheel you posted the picture of came from a wasted twin shock model that was then resurrected and used lovingly here on your machine?

[Bob_Roller]

No, the wheel pictured in the photo, is for a mono shock bike, the mono shock bikes have 4 bolts to hold the wheel on .

No axle and a nut like the twin shock bikes have .

[Air4Life]

Okay Bob, so what gives with the worn spline look?

[Bob_Roller]

Nobody seems to know, it's the first time anything like this been posted before and there very few R65 mono shock owners on this forum to get any idea what the wheel should look like .

It may have been something that was used during the manufacturing process of the wheel .

Or possibly the splines were damaged during a tire change .

[tvrla]

They're possible just casting marks left from manufacturing. Who knows?

The outside of that area might have something to do with aligning the wheel to the final drive, but the center does nothing. And it certainly doesn't need drive splines any more than the wheels on your car.

[raymr]

I put new tires on earlier this year and I recall seeing something similar. The wheel mounts onto the hub just like on a car, and the only wear item is the braking surface.

[Air4Life]

wirespokes:  That sounds very likely.  When they manufacture these hubs maybe they place it on a similarly splinned shaft (albeit less depth spindle) for trimming the excess material or some other finishing details.