Reynolds 531

Reynolds 531
Reynolds 531 brand logo
Product typealloy steel tubing
OwnerReynolds Technology
CountryEngland
Introduced1935
Related brands
  • Reynolds 520
  • Reynolds 525
WebsiteReynolds 531

Reynolds 531 (pronounced 'five-three-one') is a brand name, registered to Reynolds Technology of Birmingham in the United Kingdom, for a manganesemolybdenum, medium-carbon steel tubing that was used in many quality applications, including race car chassis, aircraft components and, most famously, bicycle frame tubing. It is one of a number of tubing types developed by Reynolds.

Reynolds 531 "was the standard of excellence for many decades" among bicycle frame-building materials.[1] And because of the availability of a wide range of butting, diameters and thicknesses of tubes, along with different stays and fork blades, it became the tubing of choice for most frame builders.[2]

  1. ^ Sheldon Brown's bicycle glossary, http://www.sheldonbrown.com/gloss_ra-e.html.
  2. ^ Husband, Geoff. "Reynolds 531 Tubing - the Cycle Tourists Friend".