2019 Specialized Riprock Coaster 20

The 2019 Riprock Coaster 20 is an aluminum frame coaster bike by Specialized.

View on specialized.com

2019 Specialized Riprock Coaster 20
  • MSRP $260
  • Suspension Rigid
  • Frame Aluminum
  • Fork Steel
  • Wheels 20″ Aluminum
  • Drivetrain Single-speed

Single-speed — 1 speed

2019 Specialized Riprock Coaster 20
12 mph
Similar Bikes
18 mph

Similar bikes are easier to ride up hills than the 2019 Riprock Coaster 20.

The 2019 Riprock Coaster 20 won‘t keep up with similar bikes while riding downhill or sprinting.


Oh snap! This frame was drawn from the actual bike geometry measurements. Roll over the table below to highlight frame dimensions.

FrameSpecialized A1 Premium Aluminum
ForkHi-Ten, 1-1/8" steerer
Bottom BracketSteel, loose ball bearings
HandlebarBMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm
SaddleSpecialized Kids' Henge
SeatpostSteel, 25.4mm
PedalsNylon platform w/ reflectors
GripsSpecialized, slip-on
CrankHi-Ten steel, 114mm, 36T
Cassette18T cog
ChainKMC Z510, single-speed, anti-drop, 1/2"x1/8"
BrakesV-brake w/ tool-less reach adjust brake lever
Rims20" alloy, 16mm depth, 21mm internal width
SpokesStainless, 14g
Front HubSteel, bolt-on, 100mm spacing, loose ball bearings, 36h
Rear HubCoaster brake, bolt-on, loose ball bearings, 110mm spacing, 18T cog, 36h
TiresRhythm Lite, 30 TPI, wire bead, 20x2.3"
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2019 Specialized Riprock Coaster 20