At 280 grams The Keo Classic 3’s are 50g ligher by using a composite material. Is there any reason to go with the R540’s? One reason is price, with the R540’s selling for between 15-20% less than the Keo’s. Each use their own cleat system but with the holes in the same place meaning road shoes that are SPD-SL compatible are also Look Keo cleat compatible.
Keo Classic 3 Pedals
The Kéo Classic 3 spindle is made up of an oversized steel axle with miniature ball bearings (12 mm inside x 18 mm outside) and a needle bearing cartridge for improved wear resistance. A spacer is used to hold the needle bearing cartridge in place. LOOK spindles are only approved after a rotational test of 2 million cycles at 100tr/min with a load of 90kg on the center of the pedal and an eccentric rotation (creating a shock on each rotation). This test is far more grueling to the current industry standard, the EN14781. The new classic two has 400 mm² surface area which is almost 40% more than the competition. The significance of this is the load is spread around the cleat rather than having a small concentrated area, which improves comfort and reduced foot discomfort.
Shimano R540 SPD-SL Pedals
Wide pedal platform for improved foot pedal stability. Wide binding section allows for more efficient pedalling. Low maintenance sealed cartridge axle unit. The low profile platform with open design allows for easy access and cleat adjustments. Easy to clip into and release but with stable fit for maximum power transfer to the pedals