*Rear drop outs were standardized according to OLN width of hubs available during the early post-war period.* ** *110 - single speed, SA, or track* *115 - 3/4 speed derailleur* *120 - 5 speed upwards* ** *The majority of used vintage frames become abused and as well as being stretched, or closed up a bit could, potentially, be out of true/alignment.* ** *Derek Athey* *Honiton, Devon UK*