WikiNerdia is a resource offered by Giantnerd® in an effort to help build a community where everyone can share knowledge in an open and honest way about products, brands, and terminology. This is a call out to all nerds in the know; help out the less experienced adventurers, pass your knowledge on or it will be lost forever! Add to it and make edits as you see fit. As with everywhere else on Giantnerd®, your collaboration will shape the way members treat and view products, categories, and the outdoor lifestyle—it’s critical to making the Giantnerd® community the best shopping site on the social web!
SPD (Shimano Pedaling Dynamics)
SPD is a type of cleat that was developed by Shimano. The SPD cleat is much smaller than a traditional road cleat, allowing the cleat to be recessed in the sole of the shoe. SPD compatible shoes, cleats and pedals use a two bolt pattern to adhere the cleat to the sole of the shoe. SPD compatible pedals/shoes allow the rider to walk easier than a traditonal road pedal/shoe.