Have now measured my chassis as follows:
* approx' 42 inches across horizontal from outer face of wheel hub dish to end of main frame tube.
* approx' 29 and three quarter inches in length from centre of rear frame tube to centre of front frame tube.
* approx'29 inches in width from centre of inner frame tube to centre of wheel mounting frame tube.
How does this compare to your trials chassis?
Cheers Bryn