p@ul250
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Paul
Just finalising my measurements.
Have seen contradictory methods for measuring toe-in. Can you confirm your measurements are over the bike's wheel base (i.e. distance between the axles) rather than the overall length of the bike, as appears often on-line.
Would seem more logical to me to be the wheelbase as it is the touch points of the three tyres that seem critical, but I just wanted to check.
Thanks
Stuart
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Hi
I can see now why these trials chairs come up regularly on ebay as unfinished projects!
I have decided to completely redo all the mountings as they come off the chair in entirely the wrong directions, and they were a bodge anyway by the previous owner.
Was going to use pipe with the same dimensions as what is there already. Am looking at mild steel CDS is this OK or is there something stronger/lighter?
The chair has a 17" wheel. If it were 18" mountings would be more level (and possibly easier, and more aesthetically pleasing), and the outfit would have more ground clearance. Is there any disadvantage is changing to an 18" wheel, apart from the expense!
Thanks for your help.
Stuart
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Hi Stu, sorry for the delay in replying (I don't come on this forum very often). CDS tube is fine as long as it's not HP hydraulic tube. I use BS 4 T45 tube which is MSA approved for role cages)tube (25mm x 1.5mm) for the main frame tubes on the chairs I build and ERW tube (20mm x 1.5mm) for the nose and rear deck.
All modern trials sidecars use a 17" wheel, ether one from a Honda cub C90 with a hub brake or a more modern 17" alloy rim laced to a Hope mountain bike hub with a disc brake set up. The disadvantage of an 18" wheel is it's extra weight
What bike are you fitting the chair to? have you tried razing the nose of the chair up? you will will find that this will push the wheel down and should increase the ground clearance. Call me on 07491642421 or email me at pdjtcollins@yahoo.co.uk
yellow outfit has Cub wheel and the green one a Hope MTB hub with disc
If you really get stuck I do do a sidecar fitting service
Regards Paul C
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Hi Stu,
Just seen your post in which you say you think your chair is a Beamish. If so your chair was designed to use an 18" wheel and yes you will have a lot less ground clearance than you will have with a more modern sidecar design. This is Chris Newsham with a Beamish chair fitted to a modern Gas Gas. He ran it for one year before coming to me for a newer chair (second photo)
