Full Size Hub in Rigid Frame

Information relating to the Matchless G80 or AJS Model 18 500cc Heavyweight.
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Full Size Hub in Rigid Frame

Postby doggone1 » Thu Nov 19, 2020 9:56 pm

Hi all I want to convert my G80s to a rigid I intend to keep my original frame and use a spare with a rigid rear which I think is 49 7 3/4 inches between rear axle I wondered if it was possible to fit my rear hub to this the spindle is bigger than rigid frame and swinging arm is about 8 3/4 between axle could you use a different spindle and adjust spacers or would I need a 55 rigid rear end were these wider?

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Re: Full Size Hub in Rigid Frame

Postby clive » Fri Nov 20, 2020 3:53 pm

I am pretty sure the full width wheel cannot be adapted to fit the earlier rigid frame because the arrangements for securing the speedo drivebox are different, however you may be able to overcome this problem. Not sure about the 55 rigid rear frame but the sales brochure for that year suggest a full width hub was fitted. However I suspect that few rigids were sold that year and you may struggle to find the correct rigid rear loop. If you change the frame, I assume you are intending to keep the front loop in order to retain the frame number and hence registration number.
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Re: Full Size Hub in Rigid Frame

Postby doggone1 » Sat Nov 21, 2020 4:10 pm

Thanks for the info I wonder what the with of the 55 rear end was I did want to try and use my running gear so may fabricate a rear to suitcif I cant find a late one

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Re: Full Size Hub in Rigid Frame

Postby matg80s » Mon Nov 23, 2020 10:45 pm

Completely doable, youll have to spread rear forks slightly, lock QD hub and trim a few spacers inside and outside hub...and of course check chain alignment...
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