Specialized Riprock Coaster 20

Name: Specialized Riprock Coaster 20
Brand: Specialized

2019 YouthGeneral youth Manufacturer page

Last known price: $270

Prices shown first for United States
Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 1 36t / 18t
Gear range: 100%
Frame: Aluminum
Brakes: Coaster brake

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

3 of 17 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Specialized A1 Premium Aluminum Not identified

Suspension

1 part

Fork

Hi-Ten, 1-1/8" steerer Not identified

Drivetrain

4 parts

Bottom bracket

Steel, loose ball bearings Not identified
Cassette

18T cog Not identified
Chain
- KMC
Crankset

Hi-Ten steel, 114mm, 36T Not identified

Brakes

1 part

Brakes

V-brake w/ tool-less reach adjust brake lever Not identified

Wheels and tires

5 parts

Front hub

Steel, bolt-on, 100mm spacing, loose ball bearings, 36h Not identified
Rear hub

Coaster brake, bolt-on, loose ball bearings, 110mm spacing, 18T cog, 36h Not identified
Rims

20" alloy, 16mm depth, 21mm internal width Not identified
Spokes

Stainless, 14g Not identified
Tires

Front: Rhythm Lite, 30 TPI, wire bead, 20x2.3", Rear: Rhythm Lite, 30 TPI, wire bead, 20x2.3" Not identified

Cockpit and contact points

5 parts

Grips
- Specialized
Handlebar

BMX, steel, 10-degree backsweep, 4-degree upsweep, 130mm rise, 560mm width, 22.2mm Not identified
Pedals

Nylon platform w/ reflectors Not identified
Saddle
- Specialized
Seatpost

Steel, 25.4mm Not identified

Sizes and geometry

1 size Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size 9

Table

Reach 315mm

Stack 413mm

Wheelbase 858mm

Head angle 70.0°

Seat angle 72.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 20″ wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 1 published size

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	315
Stackmm	413
Top tube lengthmm	449
Seat tube lengthmm	250
Head tube lengthmm	80
Head tube angle	70°
Seat tube angle	72°
Chainstay lengthmm	386
Wheelbasemm	858
Front centermm	476
Bottom bracket dropmm	42
Standover heightmm	477
Fork rakemm	23
Trailmm	71
Stack/reach ratio	1.31
Suspension and parts
Crank lengthmm	114
Handlebar widthmm	560
Stem lengthmm	37
Seatpost lengthmm	220

Not published by the manufacturer: Bottom bracket height, Front travel, Rear travel, Stem angle and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Steel

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 36
Largest chainring: 36
Rear sprockets: 1
Smallest sprocket: 18
Largest sprocket: 18
Lowest gear: 40.0 in
Highest gear: 40.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Coaster brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: No shifting

Additional specifications

Tire width: 2.3″
Travel: Front: Additional specification: Not available: Yes
Rear: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 20″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 15.3 km/h
Highest gear: 15.3 km/h

Total gear range 100%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 40.0–40.0 gear inches

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2019 builds

Differences across 2019 builds
Specification	This bicycle Specialized Riprock Coaster 20	Specialized Riprock 24 – Sagan Collection	Specialized Riprock Coaster 12	Specialized Riprock Coaster 16	Specialized Riprock Comp 24	Specialized Riprock Expert 24
Frame
Fork material	Steel	Not informed	Steel	Steel	Not informed	Aluminum
Suspension
Suspension configuration	Rigid	Hardtail	Rigid	Rigid	Hardtail	Hardtail
Front travel	Not informed	70 mm	Not informed	Not informed	70 mm	70 mm
Drivetrain
Smallest chainring	36	30	36	36	30	32
Largest chainring	36	30	36	36	30	32
Rear sprockets	1	8	Not informed	Not informed	9	10
Smallest sprocket	18	11	Not informed	Not informed	11	11
Largest sprocket	18	34	Not informed	Not informed	36	36
Lowest gear	40.0 in	21.2 in	Not informed	Not informed	20.0 in	21.3 in
Highest gear	40.0 in	65.5 in	Not informed	Not informed	65.5 in	69.8 in
Brakes
Brake type	Coaster brake	Mechanical disc	Coaster brake	Coaster brake	Hydraulic disc	Hydraulic disc
Cockpit
Shifting	No shifting	Mechanical	Mechanical	Mechanical	Mechanical	Mechanical
Other specifications
Suspension	Rigid	Hardtail	Rigid	Rigid	Hardtail	Hardtail
Tire width	2.3″	2.8″	2.3″	2.3″	2.8″	2.8″
Wheel size	20″	24″	12″	16″	24″	24″
Bottom bracket standard	Not informed	BSA	Not informed	Not informed	BSA	BSA
Fork spring	Not informed	Coil	Not informed	Not informed	Air	Air