My guess is you have been buying the typically crap hose reels that most window cleaning suppliers sell. There are absolutely not fit for purpose and are a  waste of £89.99 with or without wheels! 
They fall apart, nuts and bolts come undone, wheels fall off plastic bushes disintegrate and are hard to wind in. 
Grippatank, X- line Systems, Window Cleaning Warehouse you should all hang your heads in shame for selling such crap.
Just go to the Gardiners website and buy a Hi-Vis 100 Hot Water Hose Reel from Koreel. for £159.00
It has proper bearings, it is built to last, takes hot water with no problem. It winds in so easy you don't need an electric reel...trust me.