only website i can suggest is http://www.runningforfitness.org/calc/rp.php , but thats more for splits for training/racing.
alternatively you could go to a local club trianing session on tue/thu/sat of any of the big london clubs and people will advise.
@dogsballs 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.
only website i can suggest is http://www.runningforfitness.org/calc/rp.php , but thats more for splits for training/racing.
alternatively you could go to a local club trianing session on tue/thu/sat of any of the big london clubs and people will advise.