@ChrisHallRides Hi Chris, just a thought for next year.....there's a 300km one day event, 50% on & 50% off roads starts at Rockcliffe in Scotland and finishes at Druridge Bay Northumberland. Think it takes place end of May/ early June. 4500m of climbing, or thereabouts.
Barry Davis has the record for the Pennine Way . Around 48 hours I think set in June 75 . That was on a steel 70s crossbike with zero suspension or any other luxuries ! Not sure if its been bettered since with lighter bikes available.
