Beach Cruiser 20 Rear & Front Wheels with 140 spokes. These are 20 rear and front wheels with 140 spokes for beach cruiser bike. The rear wheel comes with coaster brake. 20" 140 Spoke Front Wheel 14G Name: 20" 140 Spoke Front Wheel 14G. 20" 140 Spoke Coaster Wheel 14G Name: 20" 140 Coaster Wheel 14G.