Specialized Hotrock 20 Coaster Boys, 2017
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Specialized Hotrock 20 Coaster Boys, 2017

Product Code B4015-3009
Other products by Specialized

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—Junior can get one, too, with the Boy's Hotrock 20 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 20-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.

Key Features
  • Tough, light, and durable, the A1 Premium Aluminum frame is built to stand up to years of tough riding.
  • A Hi-Ten steel fork is strong and durable, so it will withstand your little ones trying to catch air for the first time.


Technical Specifications

FRAME
Specialized A1 Premium Aluminum, 20" singlespeed coaster, formed top tube/down tube, forged horizontal dropouts
FORK
Hi-Ten steel, 1-1/8" threadless steerer, 3/8" axle dropouts
STEM
Ahead, alloy, 1-1/8" steerer, 22.2mm clamp, 37mm extension
HANDLEBARS
BMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm
GRIPS
Specialized, Kraton, closed end, 105mm
BRAKE
Rear V-brake, alloy, linear pull w/rear coaster brake
CHAIN
KMC Z510, single-speed, anti-drop, 1/2"x1/8"
CRANKSET
Hi-Ten steel, OPC
CHAINRINGS
36T
BOTTOM BRACKET
Steel, loose ball bearings
PEDALS
Nylon platform w/reflectors
RIMS
20", alloy single wall, pin joint, 32h
FRONT HUB
Steel, nutted axle, 36h
REAR HUB
Steel, coaster brake, nutted axle, 36h
SPOKES Stainless, 14g
FRONT TYRE
Specialized Rhythm Lite, 20x2.0", 30TPI, wire bead
REAR TYRE
Specialized Rhythm Lite, 20x2.0"
INNER TUBES
Schrader valve
SADDLE
Specialized Kids', 7mm rails w/clamp
SEATPOST
Steel, 25.4mm
SEAT BINDER
Alloy, 31.8mm

Geometry

Bottom Bracket Height 227mm
Chainstay Length 386mm
Head Tube Angle 70°
Head Tube Length 80mm
Rake 23.5mm
Seat Tube Angle 72°
Seat Tube Length, Center to Top 241mm
Standover Height 505mm
Top Tube Length (Actual) 438mm
Top Tube Length (Horizontal) 456mm

NOTE: Price applies to Online sales only, pricing may differ in our Retail store.
  • Red/White/Black  $345.00 | In-store $345.00

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