Hotrock 24 21-Speed Girls
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Hotrock 24 21-Speed Girls

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Hotrock 24 21-Speed Girls
Technical Specifications
Durable A1 Premium Aluminum frame, a suspension fork with 50mm of travel, and wide range gearing make the Hotrock 24 21-speed trail-ready for big kids.
  • 24" A1 Premium Aluminum frame with low standover height for care-free starts and stops plus room for full-sized water bottle
  • 50mm-travel SR Suntour suspension fork with lightweight alloy lowers and pre-load adjust takes the edge off bumps for more control
  • Specialized Roller Sport tires provide a knobby grip for dirt, but roll easily on pavement
  • Versatile 21-speed crankset with forged alloy arms for power and a chainguide to keep pant legs clean on the way to school
  • Kid's Body Geometry saddle is durable and comfortable and fits young riders perfectly
  • Lightweight alloy riserbar and Ahead stem puts kids in a comfortable and confident position, with easy Allen-wrench adjustments
  • Shimano Revo 7-speed twist shifters allow easy, safe gear changes without switching hand positions on the bars
  • Shimano 7-speed, 14-28t freewheel offers kid-friendly gearing options optimized for smooth shifts

Technical Specifications

CHAIN KMC Z7, reusable Missing Link
BOTTOM BRACKET Water sealed, loose ball, 68mm x 128mm
CRANKSET Forged alloy arms, triple chainring with chainguard
FRONT DERAILLEUR Shimano FD-CO50, 3-speed
SHIFT LEVERS Shimano RS-31, 6-speed, Revo Twist
CASSETTE Shimano 7-speed, 14-28t
CHAINRINGS 42/34/24, w/ chainguard
REAR DERAILLEUR Shimano TX-31, 7-speed, direct mount
SADDLE Specialized Kids Body Geometry, 1pc., 7mm rail w/ clamp
SEATPOST Alloy, 27.2mm, micro adjust
STEM Alloy Ahead, 4 bolt, 20º rise, 25.4mm clamp
HANDLEBARS Hi-Ten riserbar, 40mm rise, 10º backsweep, 6º upsweep, 25.4mm
GRIPS Specialized Revo type
FRONT HUB Forged alloy, loose ball, nutted axle, 32h
REAR HUB Forged alloy, freewheel type, 32h, nutted axle
INNER TUBES Schrader valve
SPOKES Stainless, 2.0mm (14g)
RIMS Alex C-1000, alloy single-wall, 32h
FRONT TIRE Specialized Roller Sport, 30 TPI, wire bead, 24x2.125""
REAR TIRE Specialized Roller Sport, 30 TPI, wire bead, 24x2.125""
FRONT BRAKE Die cast, alloy ""V"" brake, 1pc. pad
BRAKE LEVERS Tektro junior reduced-reach ""V"", alloy, linear pull compatible
REAR BRAKE Die cast, alloy ""V"" brake, 1pc. pad
PEDALS Composite platform w/ reflectors, loose ball, 9/16""
HEADSET 1-1/8"" threadless, loose ball
SEAT BINDER 34.9mm, alloy, extruded QR lever/collar
FORK SR Suntour SF11-XCT-JR-24, 1pc. alloy lower, 25.4mm Hi-Ten stanchions, 1-1/8"" Hi-Ten steerer, coil/mcu w/ preload adj., 50mm travel
FRAME Specialized A1 Premium Aluminum, 24"" frame, suspension fork geo w/ low standover TT, formed DT/TT, forged dropouts w/ replaceable hanger


Geometry Chart

Hotrock - Geometry

  7-SPD 21-SPD
Top Tube Length (Actual) 498mm 498mm
Top Tube Length (Horizontal) 507mm 507mm
Seat Tube Length, Center to Top 312mm 312mm
Standover Height 586mm 586mm
Wheel Base 978mm 992mm
Chainstay Length 410mm 420mm
Front Center 572mm 572mm
Bottom Bracket Height 262mm 262mm
Seat Tube Angle 73° 73°
Rake 40mm 40mm
Head Tube Angle 69° 69°
Head Tube Length 120mm 120mm