Causes of toe cramps

The Rookie
The Rookie Posts: 27,812
edited July 2015 in Health, fitness & training
Been doing longer rides of late, I am always prone to cramps and have to drink a lot (no not alcohol or plain water either) to fend them off, on a recent long distance ride I was on the verge of cramps in my toes the whole time (it felt like my toes were on fire at times, but plenty of fluids would fend it off, it was a hot ride mind and I downed 5.5litres in 11 hours and didn't pee once) and was wondering if, apart from other causes, it may be caused by cleat position (SPD, shimano shoes) loading my toes up to counteract pedal force. Any thoughts before I go ahead and move my cleats back a few mm (if there is any room on the sole!).
Currently riding a Whyte T130C, X0 drivetrain, Magura Trail brakes converted to mixed wheel size (homebuilt wheels) with 140mm Fox 34 Rhythm and RP23 suspension. 12.2Kg.