Robb Nortier's Rear Frame Alignment Gauge.

These gauges help you to align the rear frame on a rigid BSA M20 that are offten found to be bent and distorted.

There is nothing worse than building a bike, or even just painting the frame, only to discover that it is bent.

This tool, along with the printed guide explains to you the procedure to realign your frame.

Also included in the guide are details of the studs and spacers that are all available from PES.