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Cycling Weekly
Cycling Weekly
Sport
Andy Turner

You've heard of 'Stack Height' but how does it apply to pedals and can changing it make you faster? We took a detailed look to see how it all stacks up

Look Shimano SRM UCI
Detail of the SRM / Q36.5 low stack pedal system.

When it comes to cycling, we all want to find every possible way to maximise performance. Aero gains, short cranks, 120g/hr of carbs, all of these have been pursued with the aim of boosting performance by professionals and amateurs alike. But in recent years, a new performance gain has come into focus again. I’m talking about stack height. In your pedal system.

What is stack height and why does it matter?

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