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Marin San Quentin 20" - Yellow-Orange - 2025 The Marin San Quentin 20 is the ultimate first “real” mountain bike for young riders. Upgraded with an air-sprung 80mm fork, tubeless-ready wheels, and a clutch-compatible Shimano drivetrain, it’s lighter, tougher, and more trail-capable than ever—perfect for progression, confidence, and fun on every ride. FRAME Series 2 6061 Aluminum, 20” Wheels, Disc Specific, 30.9mm Seatpost and Dropper Compatible HEADSET FSA No. 57E FORK Manitou Junit Sport, 20", 80mm Travel, Air Sprung, Adjustable Rebound, Tapered Steerer, 15x110mm Thru-Axle REAR DERAILLEUR Shimano Altus, 8-Speed SHIFTER Shimano Altus SL-M315, 8-Speed CRANK Marin Forged Alloy, 127mm Arm Length CHAINRING 30T CASSETTE Shimano 8-Speed, 11-32T CHAIN KMC Z8 FRONT BRAKE Tektro HD-J285, Kid's Specific Hydraulic Disc REAR BRAKE Tektro HD-J285, Kid's Specific Hydraulic Disc REAR HUB Forged Aluminum, 32H, Disc Specific RIM Marin Double Wall Alloy, 26mm Internal Width, Tubeless Compatible TYRE Delium Versatile, 20” x 2.4”, Light Construction, Wire Bead MAX TYRE SIZE 20” x 2.4” HANDLEBAR Marin Riser Bar, Width: 580mm, Bar Bore: 31.8mm, Rise: 30mm GRIPS Marin MTB Grips SADDLE Marin One-Piece Saddle/Post Combo SEATPOST Integrated With Saddle, 27.2mm Alloy STEM Marin Alloy, 40mm PEDALS Kids Specific Nylon Pedals BIKE WEIGHT 11.8 kg