"you fitted some marathon plus tyres to their bike and then sent them on their way with 40 psi in the tyres, why was that?"
Could it be because 40psi is the right pressure for some riders on some sizes of Marathon Plus?
@gbj_tester 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.
Could it be because 40psi is the right pressure for some riders on some sizes of Marathon Plus?