cdhpower 29"/700c black aluminum mag wheels - 66cc/80cc gas motorized bicycle cdhpower (attention: standard 9 hole sprockets 24t to 60t in kit do not work on this alum wheel )29"/700c aluminum wheels are designed mainly for motorized bicycles. light and very durable. 29" /700c size wheel;do not need adapter, sprocket only needed; easy install sprocket on mag wheel;<br>(attention 2: please smear lubrication oil or engine oil on 6pcs screws before fastening sprocket/disc brake rotor on mag wheel in order to prevent damage of screw thread inside of mag wheel from happening. <br>smear lubrication oil or engine oil on the screw thread which connects the flywheel)