There are usually three common size, 25.4, 26, and oversize (31.8mm), your is likely to be the oversized one as far as I know, but measure it first.
@edscoble started
London Fixed Gear and Single-Speed is a community of predominantly fixed gear and single-speed cyclists in and around London, UK.
This site is supported almost exclusively by donations. Please consider donating a small amount regularly.
There are usually three common size, 25.4, 26, and oversize (31.8mm), your is likely to be the oversized one as far as I know, but measure it first.