Originally Posted by AristoNYC

I have the GR-10 with Soma Oppy-X 4 clips in L/XL size. They fit my 11.5 foot just fine. I prefer the GR-10 to the GR-9 due to the smooth surface. The GR-9 can get painful, especially when climbing with softer sole shoes. Truthfully I don't use them anymore since I ride clipless on all my bikes but if you're looking for a good combo I recommend the GR-10 and a similarly sized clip.