- Tubing
- Every catalog Professional is Reynolds 531 butted tubing throughout, forks and stays included. Look for the Reynolds 531 butted tubes, forks and stays decal on the seat tube and the small 531 decals on the fork blades. Owners report Carlton decals on the seat tube of 1972 and 1973 bikes, which is a clue to where they were built.
- The frame
- The lugs changed by year. The 1974 Mark IV used Latin-line spearpoint lugs with a CC cutout in the bottom bracket shell, and the 1978 Mark V used Haden lugs with window cutouts and semi-wraparound seatstays. Ask for close photos of the bottom bracket shell, because Sheldon Brown's own Professional frame came to him cracked between the seat tube and down tube.
- Sizing
- Raleigh listed six sizes from 20.5 to 25.5 in in its 1970, 1974 and 1978 catalogs. Ask the seller to measure the seat tube and top tube, since a listing's size rarely says how it was measured.
- Threads and standards
- Raleigh's higher-end lightweights, the Professional among them, were built at the Carlton works with British Standard Cycle (English) threading, so a modern English bottom bracket fits. Cheaper Nottingham Raleighs used Raleigh's own 26 TPI threads, so don't assume a part off another Raleigh will fit. The 1978 catalog lists a 27.2 mm Campagnolo Record seatpost.
- Wheels
- It came on tubulars, with Sprint alloy rims and Campagnolo Record large-flange hubs in 1974 and Mavic Sprint rims on small-flange Nuovo Record hubs in 1978. We couldn't find a published rear spacing, so measure it before you buy wheels.
- Parts it came with
- The catalogs list Campagnolo throughout. The 1974 Mark IV had Record brakes, Nuovo Record derailleurs and a cotterless Campagnolo crank, and the 1978 Mark V had Record sidepulls and a Nuovo Record crank with 42/51 rings. A Brooks Professional saddle and a Silca Impero pump were stock, and many bikes have since lost their Campagnolo parts.
- Dating it
- From 1966 to 1973 Raleigh's 531 frames start the serial with a year letter, E for 1970, F for 1971, G for 1972 and H for 1973. From 1974 the serial starts with W for Worksop, then a letter for the fortnight and a digit for the year. Raleigh reused letters at times, so check the paint, decals and parts against the year.
- Paint and decals
- Catalog colors were Special Mink and Silver for the 1970 Limited Edition, Blue Mink with silver or Silver with black in 1974, and Steel Blue in 1978. Chrome fork tips front and rear were standard by 1978.
- Safety jobs
- If it still wears tubulars, the tires and glue are likely decades old, so replace and reglue before you ride. Fit fresh brake pads and pull the stem and seatpost to make sure neither is seized.
Check the listing photos against these lists, and ask the seller about anything you can’t see. Swapped or missing original parts should come off the price if originality matters to you. For replacements, see our vintage components guide.