Thanks to your helpful information I've now established the cross tube is close to 5.1/2" long depending how you measure it as it has to be scalloped around the shape of the adjacent sub frame tubes. initially I assumed the cross tube was the same diameter as the rest of the upper sub-frame i.e. 3/4" but I can see from the remnants of what I have that it is a smaller diameter. Please can someone confirm the correct diameter?
