The latest in Shimano's Ultegra SPD SL pedal lineage, the Ultegra PD-6700-C SPD-SL Carbon Pedals forego aluminum for the main pedal body, instead relying on a carbon fiber composite structure, just like their more expensive Dura-Ace counterparts. These carbon Ultegra pedals are 60 grams lighter than the alloy versions.
Even with the new weight savings, Shimano has ensured that these pedals still deliver the same blissful retention and instant release that we've grown accustomed to with SPD-SL pedals. In fact, the retention mechanism hasn't changed.
The carbon composite pedal body is molded onto a machined aluminum sleeve that houses the two bearings in each pedal. The whole assembly spins on a stainless steel spindle. The new pedals retain the replaceable stainless steel wear plate that sits atop the pedal body, and it supports the SPD SL cleat for maximum lateral stability and allows a hard surface for your cleat to float against for efficient bio-mechanics.
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