Thanks M1kea and Atlas
Never experienced any of the symptoms you describe despite using SPDs for 20+ years. On the road bike with carbon, plastic and mtb soles. haven’t used SPDs on an mtb for probably 15yrs but never experienced it when I did..
Can’t really see how it’s caused by duration of the ride? badly fitting shoes, poor cleat set-up or poor pedalling technique sound more likely culprits, no?
I have monkey feet (v broad and high insteps) so take shoe fit seriously. All my shoes have conformable moulded insoles and I currently have, Carnac, Northwave, Sidi and Spesh shoes.
Two factors I am confident with: 1) MTBing involves a lot of stop start so you get to flex the feet more. 2) I only tend to get this problem when it’s hot.
Back OT, road cleats do wear quite quickly if you do any walking on them. – Another factor to consider?