I'll second Paul J's suggestion of Gatorskins. Our collective weight is 350 pounds and have ridden 28s for years. Last fall, I put a 32 on the back and lowered the pressure about 5 psi. There is slight decrease in the harshness on rough roads and I don't notice any other difference. I put a 32 on the front but it would not go into the wheel bag we use when we haul our tandem so I put the 28 back on.