I do not think this is the problem as she does not put her leg back a long way, must be just enough to put backward pressure on the stirrup bars, which are parallel to the ground. I have a Albion K2 and the stirrup bars have a very pronounced angle downwards to prevent this happening. I have...
I bought my wife, Penny, a new Harry Dabbs GP saddle last November costing £1350. Four times the stirrups have fallen off, first of all, taking advice from books, we did not latch up the safety catches and thought this may have been the problem. However we started turning up the safety catches...