Pedal Problem

amc Posts: 315
edited March 2009 in Workshop
Do I need new pedals?
I have Shimano SPD Ultrega pedals which i use in summer and for sportives - swapping over my commuting recessed pedals when necessary.
But while changing over, part of the little black plastic grip (about a quarter) where one puts the pedal spanner has come off. I can still just about get the pedal on and off but it is dangerous or will it affect performance??
The pedals are around 3 years old so if i have to change them its not the end of the world but i could do with getting another summer out of them.
What do you think?