Well I really can't prove I didn't stop at 49.1KMS!
Have been getting inconsitent result from Wahoo oflate. Going down an nice bit of Tarmac and one minute I'm doing 30KMHR next its 8.8. Maddening.
So was out cycling for over 3 hrs and all it recorded was 1hr 54mins of activity for 20km! Have posted the route I rode (well the last bit) and feel confident it was over 50kms based on previous rides. Full route posted on main thread.
Thought an "update" check was in order and sure enough it was.
However back on bike and still same problems. After a no of stops and rebooting; discovered the magnetic sensor on a rear spoke that swings past the sensor was not perfectly parallel to the sensor itself. Wasn't obvious to the naked eye but fiddling with it seems to have sorted the problem.
Due to travel and having fun, only managed 2 rides this month. The motivation provided by this thread, amazes me.