Bike ride not smooth I've a full suspension mountain bike with a 26 inch knobby on the front wheel, this knobby has got these rectangular knobs poking out. My problem is that I find my bike's ride "not so smooth". I currently inflatate my front tire to 32 PSI and the rear one, with a better tread and sleeker dimension, to a 34 PSI. The knobbies are particularly buzzy and make this very unlikeable buzz, even on low speeds. Plus my bike's rear hub makes the rear wheel and freewheel wobble, plus the wheels doesn't rotate very smoothly, what should I attribute the bumpy and seemingly harsh ride to? Also, what degree of changes should I make to my inflation levels? My knobby front is new, so changing is really not an option and well, the knobby owes itself to my unknowing self a while back. What I'm looking for is a better riding experience and satisfaction. And, how urgent is the rear hub overhaul, really? I mostly ride on nice paved roads with zero dirt trail encounters (a metropolitan, no far-off excursions)
I have similar treads and vibration on my hardtail. Some solutions:


Reduce the pressure, but this will increase rolling resistance, thus reducing efficiency. I don't recommend this one. I would prefer to keep the vibration than to reduce my efficiency.
Just replace the tires to smoother ones. I recommend this one because smoother tires will not only make your ride smoother, but also increase efficiency. You should do this unless you are on a limited budget.