If the ride felt easy then i'd say there's something wrong here. With a CTL <100 a ride of over 300 should feel hard and take a day of two to recover from.
What do your sessions over the next few days look like?
@alasdair 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.
If the ride felt easy then i'd say there's something wrong here. With a CTL <100 a ride of over 300 should feel hard and take a day of two to recover from.
What do your sessions over the next few days look like?