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Hotrock 24 21-Speed Girls

Hotrock 24 21-speed Girls

Durable A1 Premium Aluminium 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 Aluminium 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 tyres provide a knobby grip for dirt, but roll easily on pavement
  • 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
  • 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

FRAME Specialized A1 Premium Aluminium, 24″ frame, suspension fork geo w/ low standover TT, formed DT/TT, forged dropouts w/ replaceable hanger
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
HEADSET 1-1/8″ threadless, loose ball
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 BRAKE Die cast, alloy “V” brake, 1pc. pad
REAR BRAKE Die cast, alloy “V” brake, 1pc. pad
BRAKE LEVERS Tektro junior reduced-reach “V”, alloy, linear pull compatible
FRONT DERAILLEUR Shimano FD-CO50, 3-speed
REAR DERAILLEUR Shimano TX-31, 7-speed, direct mount
SHIFT LEVERS Shimano RS-31, 6-speed, Revo Twist
CASSETTE Shimano 7-speed, 14-28t
CHAIN KMC Z7, reusable Missing Link
CRANKSET Forged alloy arms, triple chainring with chainguard
CHAINRINGS 42/34/24, w/ chainguard
BOTTOM BRACKET Water sealed, loose ball, 68mm x 128mm
PEDALS Composite platform w/ reflectors, loose ball, 9/16″
RIMS Alex C-1000, alloy single-wall, 32h
FRONT HUB Forged alloy, loose ball, nutted axle, 32h
REAR HUB Forged alloy, freewheel type, 32h, nutted axle
SPOKES Stainless, 2.0mm (14g)
FRONT TYRE Specialized Roller Sport, 30 TPI, wire bead, 24×2.125″
REAR TYRE Specialized Roller Sport, 30 TPI, wire bead, 24×2.125″
INNER TUBES Schrader valve
SADDLE Specialized Kids Body Geometry, 1pc., 7mm rail w/ clamp
SEATPOST Alloy, 27.2mm, micro adjust
SEAT BINDER 34.9mm, alloy, extruded QR lever/collar
NOTES Chain stay protector, reflectors, clear coat, owners manual
WP Post Tabs


The little ones who ride a Hotrock—and the parents who buy them—want “big kid” quality and technology in a “little kid” package. These riders need a bike that’s light, safe, durable, and easy to control, whether getting their first feel for the dirt on front suspension mountain bikes or cruising the blacktop on 12” walkers.

Proprietary aluminium tubing used in all of our Hotrock frames.

Creates light, strong, high-value, and size-appropriate frames where many competitors still use heavy plain gauge tubing (cheap to make, but pounds heavier!).

By controlling everything from the raw material to extrusion, butting, swaging, and heat treatment of the tubes, we can optimise our Hotrock frames for the best balance of strength, weight, and durability for young riders.

50mm-travel SR Suntour fork on select models with pre-load adjust and lightweight alloy lowers.

Provides true off-road capability and smoothes out obstacles on any surface.

50mm of smooth travel absorbs bumps in the road or rocks on the trail, building confidence and honing technique. Adjustable preload tunes the fork to the correct spring rate at the turn of a dial, guaranteeing the proper amount of suspension for a kid’s weight.

Sturdy aluminium wheels with Specialized flat-resistant tyres.

Lighter weight and longer life with better control and confidence.

Aluminium wheels have better strength-to-weight ratio and are lighter than steel, plus they are more weather-resistant. Various high-quality, puncture-resistant Specialized tyres are specifically chosen for each bike model, depending on the unique needs of the young rider and the experience.

Low standover height and low bottom brackets in a full range of sizes for each age.

Builds confidence because kids of any age can easily step down when starting and stopping, and more seatpost adjustability gives them room to grow into their frames or hand them down to siblings.

With low bottom brackets, the frames have a lower centre of gravity that’s more stable. This also allows us to spec size-specific crank arms and make seat tubes and seatposts longer for increased adjustability.

WP Post Tabs

Specifications subject to change without notice.


Shorter Rochford

65-67 Woodhouse Road



N12 9ET

020 8445 9182

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  • Opening Hours
  • Mon-Tue 9:00 - 18:00

    Wednesday 9:00 - 19:00

    Thursday closed

    Friday 9:00 - 18:00

    Saturday 9:00 - 17:30

    Sunday Closed


    Shorter Rochford

    27 Barnet Road

    Potters Bar


    EN6 2QX

    01707 662 332

    View Map
  • Opening Hours
  • Mon-Tue 9:00 - 18:00

    Wednesday Closed

    Thurday 9:00 - 18:00

    Friday 9:00 - 18:00

    Saturday 9:00 - 17:30

    Sunday Closed

    ©2013-2014 Shorter Rochford Cycles