You need this to take off the existing pedals and put on some Shimano SPD pedals:
http://www.parktool.com/products/det...7&item=PW%2D4#
Other pedals like Shimano SPD-L, Look, etc use hex wrenches for installation. But I suggest you go to a bike shop and buy the pedals. This way you can also have them put them on your bike and also do a fit for you (maybe for an additional charge). The most important thing is getting cleats in the right spot. You may think you have them right since you have been using them on a spin bike. But in reality the setup on your road bike is different then the spin bike and you will be probably putting in longer hours on your road bike. Things can feel fine after 45-60 mins on a spin bike but after you have ridden 2+ hours on a road bike do you start to really notice when things aren't right.




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