Hi all,
I have a '55 US model G80CS pretty original condition that I ride regularily in Historic bike club rallies and rides. I have been doing modern trials for a year now, and feel like my skills are at the point where I can trust myself on an 'old bike' without the fear of trashing it too much.
So, I am starting the thought process of deciding on what bike to buy, build or find!
A friend of mine has an original G3LC trials, believed to be '56, which has the same full width hubs as my G80CS, seemingly correct rear subframe, and gerling shocks. That said, he'd never let me ride it in a trial, however, I've ridden it more than he has! At least I have good reference bike.
Finding an original Matchless trials bike here in OZ, would be all but impossible - and as such, I may be forced to convert a road bike or, build one from scratch.
My question really is, is there any documentation or , can anyone point me in the direction of information on the differences between factory rigid and sprung frame geometry?
A modern trials bike has a wheelbase of around 1320mm (52") and a head angle around 26 deg, though unspecified by manufacturers.
Wondering if I'd be better served weight, wheelbase, and steering wise (and money wise!) with a rigid matchless frame? I know the front end on my G80CS is very 'slack' and it is hard to steer on the road, suspect it would be hard to steer off road in a trials environment?
IS there any comparisons between wheelbase and head angle on the early rigid vs later 50's sprung frames? A wild guess here, but I suspect the head angle is probably not a lot different between the sprun and rigid frames, and , likewise, between road and scrambles frames. Please correct me if I'm wrong!
Pic for attention.