AndyMart":1zq86rhv said:Seat post should be 27.2mm and you'll need 39-49mm drop brakes. eBay should be a good place to pick up a kalloy seat post. It sounds like your forks have been replaced. Worksop closed in 1981 so your frame was made at the Nottingham lightweight unit, still a great frame and nice ride, cheers, Andy.