21 Speed Kent Dual Drive Tandem Prowheel with Shimano Revo Shift. Great on hills, has actually been ridden up short high grade @ 12 % and to the top of East Rock Park in New Haven. Has over $100 worth of upgrades includes center mean loading/unloading stability along with stock kick stand, wired bike computer, foot rest pegs for rear traveler, front light, bells, rear view mirrors, leak resistant rear tire, 2 spare tires, fender kit, spare tube, child seat mounted to Topeak Explorer 55 lb. bike rack, cushioned rear seat available.