THE CHAIN IS TOO TIGHT OR LOOSE?
There is a zipper screw on the rear axle, see below picture. Please removethe black cover first, and then adjust the screw.
Tighten the chain by screwing it clockwise;
Loosen the chain by screwing it counter-clockwise.
Any more questions, feel free to contact our US local agent atTOLL FREE: 1-877-BIKE AID (245-3243) or e-mail: firstname.lastname@example.org.