Originally Posted by ACyclingRooster

Hi again clubman. My angle of bend at the knee is 2* short of a right-angle and I have absolutely no difficulty with achieving a straight leg when fully extended.
Here in the UK the angle of bend is measured between the thigh-bone and the tibia and seemingly 90* to 92* is perfectly OK and especially at my age.
Until I moved some 5 years ago from a very very bumpy part of West Lancashire,England I could still manage steeper than 1in5 (20%) gradients and on occasions could happily tackle steeper and shorter ones at 11in4 (25%) 1in8 (12.5%) was regularly climbed to even leave my local area.