commando rear wheels / tyres.

A 110 x 18 Avon roadrider is 115mm wide and has 10 mm clearance on the rear chain on my 750 Commando. My Commander has a 120 X 18 Roadrider and that is 125mm wide. That would cut your clearance down to 5mm and that doesn't allow much scope for wheel adjustment or the fitting of a chainguard. The swinging arm tubes are a larger diameter on the Mk3 so I don't know how close they would get to the tyre. The chain is the limiting factor. bear in mind the rim is already offset to the right by 3/16" to allow for the engine being that far to the left in the frame. You could space out your gearbox and rear wheel sprocket to give you more clearance but then the chain will saw through your inner primary chaincase.

Hi,i ran my 750 for a while with a back wheel from an Aprilia Pegaso this had a 130/80 x 17 tyre the bike handled like pig and weaved all over the road at high speeds ,when i reverted back to a 110 x 19 it handled fine regards nick