I bought a used Trek Navigator 2.0 (comfort bike). I got it because I will riding on roads and trails. I've gotten my seat height properly adjusted, but I'm having difficulty getting my handlebars right. I've been riding on a trainer and my hands and middle and ring fingers get numb. When I ride in a more upright position, my butt is uncomfortable. Since it's a men's bike I'm thinking maybe another saddle. I has a Bontrager seat.