In terms of power transfer? Rotating weight? Nah. The only reason to purchase new pedals would be if you wanted to chase aero gains (pretty high up the aero tree on a $/watt basis) or if you wanted something with specifically restricted or no float (speedplay).

As long as you aren't having any problems, then just stick with what you've got.

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Jonathan Blyer,
ACME Bicycle Co., Brooklyn, NY

thanks guys

I changed from look to shimano spd sl to be able to run with them in the transition zone.

You can run in a SPD SL shoe?

I go arse over tit everytime

Shimano's SPD-SL and Time's Xpresso have a much wider cleat base and, in my experience, less slippery rubber at the corners. I wouldn't run a marathon in them, but it's not as sketchy to walk in as a Look cleat (nevermind the metal Speedplays).

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ZONE3 - We Last Longer

That's why Look makes the Keo Grip cleats that have been out for many, many years. Speedplay also finally came out with a Walkable cleat.

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Favorite Gear: Dimond | Cadex | Desoto Sport | Hoka One One

I wouldn't call it running, more of a messed up form trot (heavy heel striking when I walk/trot in my cycling shoes with shimano spd-sl's). I once was too lazy to take off my shoes and went up a flight a hardwood stairs (forgot to grab something in my home office).....that was interesting. Had to side step it like a kid who just learned how to go down stairs (who could barely walk).