Boy's Hotrock 12 Coaster
Part No.  

Boy's Hotrock 12 Coaster

Part No.  115141
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Boy's Hotrock 12 Coaster
Overview
Technical Specifications
Geometry
Chances are, your first bike had a coaster brake. They're easy to use, and honestly, you can't beat the awesome skids that you can do with them. If you're feeling overwhelmed with nostalgia right now, don't worry—Juniorl can get one, too, with the Boy's Hotrock 12 Coaster. It has one gear that's easy to spin and a simple-to-use coaster brake. This means that the bike is easy to ride, but just as importantly, it means less maintenance for you. We also made the bike to be plenty tough to stand up to the hard use that every kid is capable of, with a durable 12-inch A1 Premium Alloy frame that has an ultra-low standover to make getting on and off the bike a breeze. Then there's a bombproof fork that'll take curb hops in stride and a whole host of strong components. Add it up, and you get a machine that's built for pure fun with a thoughtful design that'll have you spending more time riding with your kid and less time at the repair counter. 
  • Tough, light, and durable, the A1 Premium Aluminum frame is built to stand up to years of tough riding.
  • A steel coaster brake makes slowing down and stopping as easy as can be.

Technical Specifications

DRIVETRAIN
CHAIN KMC Z510, single-speed, anti-drop, 1/2""x1/8""
BOTTOM BRACKET Steel, loose ball bearings
CRANKSET Hi-Ten steel, OPC
CHAINRINGS 26T
WHEELS
FRONT HUB Steel, nutted axle, 36h
REAR HUB Steel, coaster brake, nutted axle, 28h
INNER TUBES Schrader valve
SPOKES Stainless, 14g
RIMS 12"", alloy single wall, pin joint, 32h
FRONT TIRE Rhythm Lite, 12x2.0"", 30TPI, wire bead
REAR TIRE Rhythm Lite, 12x2.0"", 30TPI, wire bead
COCKPIT
SADDLE Specialized Kids', integrated handle, 25.4mm integrated steel seatpost
SEATPOST Steel, 25.4mm, integrated w/ saddle
STEM Quill, alloy, 22.2mm clamp
HANDLEBARS Specialized Kids', steel, 10-degree backsweep, 4-degree upsweep, 55mm rise, 22.2mm
GRIPS Specialized, Kraton, closed end, 105mm
ACCESSORIES
PEDALS Nylon platform w/reflectors
FRAMESET
SEAT BINDER Alloy, 28.6mm
FORK Hi-Ten steel, 1"" threaded steerer, 3/8"" axle dropouts
FRAME Specialized A1 Premium Aluminum, 12"" singlespeed coaster, formed tubes, horizontal dropouts

Geometry

Geometry Chart

Hotrock - Geometry

6
  6
Crank Length 3in
Stem Length 35mm
Handlebar Width 470mm
Seat Post Length 190mm
Chainstay Length 272mm
Seat Tube Angle 71°
Head Tube Angle 70°
Rake 5mm
Head Tube Length 80mm
Top Tube Length (Actual) 331mm
Top Tube Length (Horizontal) 349mm
Seat Tube Length, Center to Top 169mm
Standover Height 352mm
Bottom Bracket Height 173mm