r80G/S, offsetting rear wheel for larger tires

I've read about this and Desert Pistons is selling a wheel that's been modified in that way.

http://www.desertpistons.com/4strokesd/forsale/forsale.htm

Anybody know what's involved, or done it? I'm thinking of shooting Woody's an e-mail to see if he's familiar with it.

Yeah, I had Buchanan do it for my G/S. They offset-drilled a blank rim for me, of the right width to run a 150 Michelin.

Got a pix of that complete bike......LOOKS super from what can be seen of it....thanks

How much offset do you want?

3-5mm is easy (cheap) with a spacer.
3mm lets me run Mitas E09 130-90x18 or Bridgestone ED12 120-80x18
Try it you may find 130 is sufficient.

140-150 could be overkill, slow your turn in rate and offer more lateral loading than your frame can cope with.
The wider tyre does offer better wear for those long, fast, competitive desert stages if that's what you're into.

Another way to get the clearance is to tweak the swingarm with a couple of bends.
You only have to pay once and can run standard wheels.

2.50 " std rim (post '81) will take a 140 knobby though I'd want a 3.00" rim for a road tyre.

That spacer sounds like a better first step. Can you tell me more about that?

What about this?
http://www.touratech-usa.com/Store/289/PN-040-0258/Wheel-Spacer-5-mm-R100GS-for-OFF-ROAD

Mine's made from 3mm aluminium sheet.
Bikes elsewhere atm or I'd take a photo.

Disc with the centre cut out and three holes in the "rim" to take the wheel studs.
You could take a pattern with gasket paper or alfoil from the inside surface of the wheel hub.

edit yep thats the sort of thing above but with 3 holes instead of 4.

That's for the R100GS (4 bolt holes) and costs 4X as much as the K75S and R11xxGS spacers direct from BMW that work with the R100GS's

any source for a spacer or do I need to make my own? 1/8" steel ought be right at 3mm. If it's as simple as making a round plate and drilling some holes I don't think it'd be difficult to knock one out.

No source for a three hole spacer.
It is a pretty simple fabrication.
I used aluminium so any wear would be on the spacer not the hub or the stub axle.
Aluminium is also lighter and easier to work and I had some lying around.

Have fun

oooh I love it when I get new projects! My main motivation isn't to fit a 130...it's to fit a 120! I always liked the Duros on my KLR. Super wide and super flat. I wanted to try them on the G/S but the 120 is so wide it hit my shock. That Ohlins has the aggravating trait of using a larger diameter spring. If it turns out the Duro still won't fit I can always trade it to jenna for beer.

Are the duro's unusually wide? I have TCK 120 and Ohlins on my G/S now.