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Boy's 6-Speed Hotrock 20


Sorry, this is now sold out.

The newer Hotrock 20 can be found here.

Part No. B4017-3309

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London (Ruislip)
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Your little tike might love to ride, but given that they're still growing like a weed, the big kid trail shredder bike can probably wait a few years. That's why we made our Boy's 6-Speed Hotrock 20 with plenty of gear range to tackle the neighborhood hills, and enough to ride beginner's trails confidently. Of course, it also features a lightweight, yet durable, 20-inch A1 Premium aluminium frame that's designed to take a hit while they find their legs on the pump track, while chatter and bumps are handled by the coil-sprung SR Suntour fork's 40mm of travel. Then there are a whole host of other components that are plenty tough enough to stand up to your little guy, so you can rest assured that you'll be spending more time riding with your kid and less time waiting in line at the repair counter.

  • Tough, light, and durable, the A1 Premium Aluminum frame is built to stand up to years of tough riding.
  • SR Suntour suspension fork offers 40mm of coil-sprung travel that smooths out bumpy, rough terrain

SizeColourPart NumberAvailability

FRAMESpecialized A1 Premium Aluminum, 20", formed top tube/down tube, forged dropouts, replaceable alloy derailleur hanger
FORKSR Suntour, coil spring w/preload adjust, 40mm of travel, 1-1/8" steel steerer, 9mm axle
FRONT HUBAlloy, 3/8" axle, loose ball bearings, dual lock nuts, 17mm contact side, nutted, 32h
REAR HUBAlloy, loose ball, dual lock nuts, 17mm contact side, steel nutted axle, 32h
SPOKESStainless, 14g
RIMS20", alloy single wall, pin joint, 32h
INNER TUBESSchrader valve
FRONT TYRERoller, 20x2.125", 30TPI, wire bead
REAR TYRERoller, 20x2.125", 30TPI, wire bead
CRANKSETForged alloy arms w/single outer chainguard
CHAINRINGS36T w/chainguard
BOTTOM BRACKET68mmx118mm, semi-cartridge, E-type
SHIFT LEVERSShimano Revo-Shift
REAR DERAILLEURShimano Tourney, 6-speed
CASSETTEShimano, 6-speed, 14-28t
CHAINKMC HV500, 1/2x3/32"
FRONT BRAKEV-brake, alloy, linear pull
REAR BRAKEV-brake, alloy, linear pull
HANDLEBARSSpecialized, alloy, 8-degree backsweep, 4-degree upsweep, 25mm rise, 600mm width, 25.4mm
GRIPSSpecialized, Kraton rubber, Revo type
STEMForged alloy, 20-degree rise, 4-bolt, 25.4mm clamp diameter
SADDLESpecialized Kids', 7mm rails w/bumper
SEATPOSTAlloy, single bolt, 27.2mm
SEAT BINDERAlloy, 31.8mm
PEDALSBMX-style nylon platform w/reflectors

As with any product, specification is subject to change without prior notification. You are advised to confirm current specification before buying.

Size 9
Bottom Bracket Drop 20mm
Bottom Bracket Height 237mm
Chainstay Length 390mm
Head Tube Angle 69°
Head Tube Length 110mm
Rake 40mm
Seat Tube Angle 72°
Seat Tube Length, Center to Top 279mm
Standover Height 555mm
Top Tube Length (Actual) 449mm
Top Tube Length (Horizontal) 465mm
Wheel Base 916mm

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