[rsu] Trials Stuff

Thanks all for the help with the trials frame stuff - Here’s my verdict in
case anyone’s interested:

My own frame - on the ears style using something like 4130 aero spec
tubing - double seat clamp - Own bearing holders on the style of hunter
but with a double lip - 36 susue hub for ease of replacement - slick tyre
for street and I have some gnarly BIG tyres from a few years ago. oh and
of course the Miyata saddle - probably a green one - if only coz nobody
likes them.