How do you adjust rear shock rebound?
To set your suspension’s rebound damping, find a kerb. Dial off all your rebound damping to minimum. Ride off the kerb, while standing up on the pedals, at slow to mid-paced speed. Your suspension will probably compress, quickly re-extend (past the sag point), compress again and then re-extend again.
How much pressure should I put in my rear shock?
For the rear shock, start at about half of your rider weight for air pressure. You will have to adjust from here, but you will want to achieve the proper SAG for your frame, as recommended by your frame manufacturer. Typically this is somewhere between 30-40% of overall travel.