bikemeister2000
Retro Guru
It's a Gran Tour frame.
The single sided chainstay bridge is a clincher. This was a feature designed by Gerald O'Donovan. His reasoning was that the bridge was just a mount for a mudguard and nothing else. Applying heat degraded the inherent tensile strength of the tube and created an unnecessary stress raiser.
At the time this frame was made, there was no distinction between what has been Lightweight and what had been SBDU. The staff became Raleigh Special Products Division. All Frame manufacture was carried out by the same guys irrespective of whether the frame was destined to be Randonneur, a Gran Sport Tourer of a made to measure special order.
Just a note on the spoke holders. Originally it would allways be on the drive side. It then served to protect the chainstay from any chainslap. I do not recall why it would be on the non-drive side.
Cheers
The single sided chainstay bridge is a clincher. This was a feature designed by Gerald O'Donovan. His reasoning was that the bridge was just a mount for a mudguard and nothing else. Applying heat degraded the inherent tensile strength of the tube and created an unnecessary stress raiser.
At the time this frame was made, there was no distinction between what has been Lightweight and what had been SBDU. The staff became Raleigh Special Products Division. All Frame manufacture was carried out by the same guys irrespective of whether the frame was destined to be Randonneur, a Gran Sport Tourer of a made to measure special order.
Just a note on the spoke holders. Originally it would allways be on the drive side. It then served to protect the chainstay from any chainslap. I do not recall why it would be on the non-drive side.
Cheers