on my previous build i went with the planet bike fenders in a 45 width running a schwalbe marathon 38c tire. I think those fenders might only be rated to a 35c tire. I see almost no options for a 38c tire. I could maybe go with the PB 29er fenders but those are 65mm.....which would look huge. I dont imagine that would help the clearance issues either. Those babies are almost $65 a pop too....