i just asked my good frend timmy malllet to shed some lght on this as he used to ride one..........definatley 531 or above in his opinion =).. hope this helps
@saddle 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.
i just asked my good frend timmy malllet to shed some lght on this as he used to ride one..........definatley 531 or above in his opinion =).. hope this helps