Seat nice ass on bike

There's no reason for cycling to be a pain in the butt. It won't be with good bike fit, an appropriate saddle and correct riding techniques. Personally I have a pretty un-amazing ass/normal looking hips(male) but after doing some measurements it turns out I needed a mm wide seat. 7. share. In doing so, you use different muscle groups which is a good thing. Mountain Bike Saddles. In most cases, the saddle on a mountain bike is set. I can guess three common reasons why your butt hurts when you ride a bike: saddles and cycling for a few months it still hurts then a bike fit is a good idea.