Posting here for advice since I know a lot of people use Speedplay pedals. My right pedal is creaking constantly, and I am pretty sure it is only the right pedal. The shoes in question are Giro's E70 knit shoes. Speedplay's literature recommends the 6F and 6R shims for that shoe.

Try as I might, I can't get the right base plate flat. The left cleat's base plate is flat. No combination of the 5 and 6 shims appears to get the right base plate flat. Below is 6F and 6R. Recall that the #6 shims are more curved than the #5s. The issue is that on the right shoe, the base plate is concave towards the rear of the shoe.



Here's 5F and 6R. This appears to be the flattest available combination. There's still some creaking. The issue I did this thinking that putting a less curved shim at the front would make the cleat straighter at the rear.



I don't have a photo of 6F and 5R, but believe me when I say that this hasn't worked either. The cleat didn't contact the sole under the shim (because the #5s are less curved), and yet the base plate was still not straight enough. I haven't mounted 5F and 5R, but the curvature with those shims looked so obviously mismatched that I didn't bother. I have tried moving the base plate forward, but the curvature issue still remains. And yes, I verified that the base plate was flat before mounting.

Bill at Speedplay did say to me that often, carbon shoes don't have consistent curvature from shoe to shoe, so there may be some issues with fit. And sure enough, that would explain why my right shoe creaks and the left one doesn't. What are my options here? Is there some fix I haven't thought of? If I try to make a warranty claim with Giro, I'm going to get laughed off the phone line, right?