BrownhillsBob's #365daysofbiking

May 21st - There’s a crucial bit of biking equipment I couldn’t live without - clipless pedals. Pedalling long distances on flat pedals is horrid, and your feet can slip in traffic. The old fashioned alternative was toe clips and straps, which were OK, but nasty if you had to get free quickly. In the 1980s, as a solution, Shimano developed the SPD clipless system.

I have sevral pairs of SPD compatible shoes, which have screw mountings on the sole under the ball of the foot. There is a metal plate embedded above which floats for adjustment. On to the plate is screwed a ‘cleat’ - a metal key block that engages smoothly with a spring-latched mechanism in the pedal. This provides a positive, hassle-free engagement which is predictable, adjustable and secure, yet twists free instantly when required. They ensure your feet are always in the best, comfiest position, and the pedals are double-sided, so you never have to think about clipping in. You just do it without looking.

Clipless allow you to ‘pull up’ with one foot while pushing down with the other, and even pedal one-legged while scooting through traffic. This small, drop-forged block of steel - about half the size and thickness of a small box of matches - transmits all your pedalling force in an absolutely tiny contact area, yet fits flush in your shoes in such a way that you can walk all day in a pair of SPD shoes and never feel the cleat.

The intense concentration of force in one small component and two 5mm screws is so great that it wears quite quickly. Tonight, my cleats had developed such a sloppy fit, I couldn’t put up with them anymore. After 5,000 miles, it was time for a change.

It’s easy to do; cleats come with pedals, or can be brought separately. You usually have to drill out one or two of the old screws due to the heads being fouled, but once you get them out, the cleat leaves an impression in the shoe that the new one locates in. A blob of grease on the screw threads, and crank them up. 

The fit is so good, it’s like riding a new bike.

My compliments to the inventors - these really are a great invention.

  1. brownhillsbob posted this
Blog comments powered by Disqus