I'm a complete newbie to this forum. I recently had a 1995 Orange P7 stolen which had been lovingly restored about 10 years ago and was my pride and joy. I've just bought another P7 frameset and want some general advice about handlebar sizes: Is there any good reason not to fit a 25.4mm bar these days? There are plenty of decent 25.4 bars on the second hand market and it would be more in keeping with the age of the bike. However I notice that there has been a size increase over recent years to 31.? Was that done for safety reasons?