F: Frame Suspension springs

[danno]

Hi
Any ideas what type of springs these are?
Could be sidecar type, changed when the bike was restored (C Rapide).
Any help appreciated.

 

[Ian Savage]

Standard and sidecar springs are same length but s/c has thicker wire.
If these are the same wire gauge then the longer one is likely to be a 'Pettiford' spring, same poundage just longer to give a
better ride height for a fixed luggage frame for touring.

 

[danno]

Standard and sidecar springs are same length but s/c has thicker wire.
If these are the same wire gauge then the longer one is likely to be a 'Pettiford' spring, same poundage just longer to give a
better ride height for a fixed luggage frame for touring.

Thanks for the reply.
They appear to be the same length and gauge. Maybe they're both Pettiford springs.
The bike had a Steib sidecar for a few years and also a Craven luggage frame.

 

[greg brillus]

Solo springs are around 300 wire diameter........sidecar are around 320 to 325 or so........solo springs give a much softer ride.

 

[vibrac]

Back of the Vincent red book by Richardson springs and wire diameters are there