24 in. Pink Teenagers, Shimano 21-Speeds Gear Mountain Bike MTB with Dual Disc Brakes and 100 mm Front Suspension SXB658139 - The Home Depot
Best mountain bike groupsets explained and rated by experts - MBR
Amazon.com : Huazu Rear Derailleur for Shimano RD-TZ31-A, Bike Parts Gear Shifter with Direct Mount/Hanger Mount for 6/7 Speed Mountain Bicycles : Sports & Outdoors