if nashbar has the pedals you want, they claim you can return anything for any reason. quote the website:
Originally Posted by http://www.nashbar.com/help/policy.cfm
100% Customer Satisfaction
We stand behind everything we sell. If for any reason you are not satisfied with your purchase, upon receipt, simply return the item with proof of purchase and we'll replace it or give you a refund or credit your account for the item.