Hotrock 12 Coaster Girls
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Hotrock 12 Coaster Girls

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Hotrock 12 Coaster Girls
Technical Specifications
If it's time to stop pushing and start pedaling, the Hotrock 12 makes the transition fun, easy, and sets her up for a lifetime of riding.
  • 12" A1 Premium Aluminum coaster-style frame is light and low to the ground, with forward BB for an easy transition from a tricycle or bigwheel
  • Alloy blade fork keeps the weight down and looks like a big kid's bike
  • Lightweight alloy rims are tough enough for any curb-hopping adventure
  • Specialized Rhythm Lite Sport tires will take a kid from the driveway to the dirt confidently
  • BMX-style, 2-piece lightweight alloy handlebar puts kids in a comfortable and confident position
  • Adjustable bar height/angle lends versatility as your child grows

Technical Specifications

CHAIN KMC Z-410, 1/2"" x 1/8""
BOTTOM BRACKET Heat treated Hi-Ten cups, loose ball for 1pc.
CRANKSET Heat treated Hi-Ten, 1pc.
CHAINRINGS 28T, disc-type
FRONT HUB Steel, nutted axle, 16h
REAR HUB Steel, coaster brake, nutted axle, 16h
INNER TUBES Schrader valve
SPOKES 14g UCP, w/ brass nipple
RIMS Alloy pinned, 16h
FRONT TIRE Specialized Rhythm Lite Sport, 30 TPI, wire bead, 12x2.0""
REAR TIRE Specialized Rhythm Lite Sport, 30 TPI, wire bead, 12x2.0""
SADDLE Specialized Kids, w/ integrated teacher's handle and 22.2mm seat post
SEATPOST Steel, 22.2mm, integrated w/ saddle
STEM Alloy quill
GRIPS Specialized Kraton Kid's w/ flange
BRAKE Coaster
PEDALS Composite platform, 1/2"" w/ ball bearing
HEADSET 1"" threaded, loose ball
SEAT BINDER 29mm, forged alloy, single bolt
FORK A1 Premium Aluminum blade, 1"" threaded Hi-Ten steerer
FRAME Specialized A1 Premium Aluminum, Ground Control geometry, 12"" frame w/ low standover TT, integrated kickstand mount, horizontal dropouts


Geometry Chart

Hotrock - Geometry

12 16 20
  12 16 20
Top Tube Length (Actual) 301mm 378mm 439mm
Top Tube Length (Horizontal) 305mm 385mm 439mm
Seat Tube Length, Center to Top 179mm 210mm 241mm
Standover Height 338mm 412mm 482mm
Chainstay Length 271mm 310mm 389mm
Bottom Bracket Height 165mm 198mm 227mm
Seat Tube Angle 76° 74° 76°
Rake 24mm 24mm 23.5mm
Head Tube Angle 70° 70° 70°
Head Tube Length 70mm 80mm 80mm