Naturally the distance from the chain stays to the rim will be different by 19/32" (15mm). The centre of the rim should be in line with the centre line of the frame. Ron

email (option): ronpier@talk21.com

As Ron,s drawing you can see the frame offset to accommodate the brake drum. Since you have a later wheel I would start from scratch. You need the tank and the rear mudguard removed. Set the brake drum sprocket so that the chain line is in line with the gearbox sprocket, then look at the centre of the rim, this should be in the centre of the top tube. If not you need to pull the rim over with the spokes so rim is central to the frame top tube. I always check this when building any bike, same with the front wheel it should sit central to the frame top tube. Re the wider chain just watch out for the chain rubbing on the inside of the chain case.

Hi Tim. Without being there to look. It seems as though Neil's wheel is correct, from his Vernier readings showing about 15mm bigger gap on the left. Ron

email (option): ronpier@talk21.com

neil can you post some more pictures of the hub assembly/spacers in the frame. i thought the wheel sat more to the right side? is the gearbox straight, have you got the correct rear engine plate spacers with brake anchor arm

This might help.



Mark

email (option): pes.sales@btconnect.com

Mark you're in the wrong thread mate:smile: Ron

email (option): ronpier@talk21.com

It was supposed to be a picture of the later M20 Frame.
For some reason I'm having nothing but trouble posting anything.

Mark

email (option): pes.sales@btconnect.com

The handy picture is there Mark. But it needs to be in the thread on frames differences.


Ron

email (option): ronpier@talk21.com