I'm away from home at the moment, so can't go to the car and measure, but given the rather British weather forecast for this weekend, was hoping to sort out the chassis for my Westie (1989 Narrowbody SE), so need to get some steel. I know in my head which ones I need (small/large/square/round) but don't know whether they're imperial or what the wall thickness is.

Can somebody tell me what size the members are...

Are the main members 25mm or 1"? What's the wall thickness?

Are the smaller members 20mm or 3/4"? Again, what's the wall thickness?

If the stockist hasn't got imperial, any issues with using the metric? (I suspect 20mm ilo 3/4" would be the biggest discrepancy)


Incidentally it's only to replace some of the braces which have been modified/dog-legged by previous owner to get a Pinto in etc.


Thanks!

Typically tube sizes were imperial and on a road chassis 16 gauge