Oldpeddaller

Hi Oli, Welcome! Your Pro-Am frame would have been one of the very last few Carlton's handmade in Worksop, the end of a 'Golden Era'. These frames were made to run 5 or 7 speed and so have a rear mech hanger on the drop out, but no brazed-on bracket for the front mech so you'll need a band-on (clamp on) front mech with the right size clamp if you want to fit a double chainring. You can run 5, 6 or 7 speed freewheels without any problems but to try to squeeze in a 9,10 or 11 speed without frame mods is asking for trouble - and why bother? The frame and fork are Reynolds 531 so it's a really nice light steel lugged frame with windowed lugs. It's your bike, so do what you want with it, but personally I'd build it up with a Cinelli, Ambrosio or TTT stem & bars, Campagnolo or Suntour gears and cranks, down tube shifters and aero brake levers with Weinmann side pull brakes - all from the late 70's although not rigidly period correct. My preference for wheels would be tubulars with small flange QR hubs - although a lot of people prefer the simplicity of clinchers and a Shimano HG 7 speed freewheel and chain. However, if you can find a Campagnolo Centaur or Daytona groupset from the early 2000's for a decent price, that would make an awesome build too. I wouldn't go any more modern than that though as there could be compatibility issues. Good luck, post photos on here please!