Yup for sure. As soon as you get 'crap is front tyre going soft, whoop, ooops, oh er', your best to just give up for the day as that confidence doesn't come back the more tired you get.
Massive lean angles on show here! Mate found it after going out the other day in the sun.
Sounds like there is something not right, especially at 15k.
Am of the opinion that once confidence drops riding style/efficiency drops.