Boy's Hotrock 20 Coaster

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. 

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. 

Part No:
    • 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

    • FRONT HUB

      Steel, nutted axle, 36h

    • REAR HUB

      Steel, coaster brake, nutted axle, 36h

    • SPOKES

      Stainless, 14g

    • RIMS

      20", alloy single wall, pin joint, 32h

    • INNER TUBES

      Schrader valve

    • FRONT TIRE

      Specialized Rhythm Lite, 20x2.0", 30TPI, wire bead

    • REAR TIRE

      Specialized Rhythm Lite, 20x2.0"

    • CRANKSET

      Hi-Ten steel, OPC

    • CHAINRINGS

      36T

    • BOTTOM BRACKET

      Steel, loose ball bearings

    • CHAIN

      KMC Z510, single-speed, anti-drop, 1/2"x1/8"

    • REAR BRAKE

      Rear V-brake, alloy, linear pull w/rear coaster brake

    • HANDLEBARS

      BMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm

    • GRIPS

      Specialized, Kraton, closed end, 105mm

    • STEM

      Ahead, alloy, 1-1/8" steerer, 22.2mm clamp, 37mm extension

    • SADDLE

      Specialized Kids', 7mm rails w/clamp

    • SEATPOST

      Steel, 25.4mm

    • SEAT BINDER

      Alloy, 31.8mm

    • PEDALS

      Nylon platform w/reflectors

    Specifications subject to change without notice.

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. 
  • 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.
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Boy's Hotrock 20 Coaster

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Geometry

  9
Seat Tube Length, Center to Top 241mm
Top Tube Length (Horizontal) 456mm
Top Tube Length (Actual) 438mm
Bottom Bracket Height 227mm
Chainstay Length 386mm
Seat Tube Angle 72°
Head Tube Angle 70°
Rake 23.5mm
Standover Height 505mm
Head Tube Length 80mm
Crank Length 114mm
Handlebar Width 560mm
Stem Length 37mm
Seat Post Length 220mm

  • Seat Tube Length, Center to Top 241mm
    Top Tube Length (Horizontal) 456mm
    Top Tube Length (Actual) 438mm
    Bottom Bracket Height 227mm
    Chainstay Length 386mm
    Seat Tube Angle 72°
    Head Tube Angle 70°
    Rake 23.5mm
    Standover Height 505mm
    Head Tube Length 80mm
    Crank Length 114mm
    Handlebar Width 560mm
    Stem Length 37mm
    Seat Post Length 220mm
    View 9 Geometry