Thanks for all the replies.. I adjusted the tilt of the seat and moved it forward which has given some relief. As my sit bones get more accustomed to riding I am getting more comfortable but 20mi. rides still produce some numbness. It's been a cold spring here in Northern Michigan so I'm still riding in jeans, that might be part of the problem too. Now I have to figure out how to stop my nose from running like a faucet in the cold. I'm already feeling increased stamina. A 10mi. ride that would have exhausted me two weeks ago is no problem now and quite enjoyable.