Rocky Mountain Vertex 20

2018 YouthMountain youth

Last known price: $699

Prices shown first for United States
Fork travel: 65 mm
Wheels: 20″, 24″
Drivetrain: 1 × 9 28t / 11–32t
Gear range: 291%
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

18 of 20 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

Rocky Mountain 6061 SL Alloy. Threaded BB. Zero Stack Headtube. 20" Kid's Geometry Not identified

Suspension

1 part

Fork
- SR Suntour

Drivetrain

6 parts

Brakes

1 part

Brakes
- Shimano Altus BR-M315
BR-M315

Wheels and tires

5 parts

Front hub
- Shimano HB-RM35
HB-RM35
Rear hub
- Shimano FH-RM35
FH-RM35
Rims
- WTB
Spokes

2.0 Stainless Not identified
Tires
- Schwalbe

Cockpit and contact points

6 parts

Sizes and geometry

5 sizes Open in the geometry plotter

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

Size 11"

Table

Reach 313mm

Stack 428mm

Wheelbase 882mm

Head angle 68.0°

Seat angle 71.0°

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 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	—	—	313	343	—
Stackmm	—	—	428	482	—
Top tube lengthmm	460	460	—	500	500
Seat tube lengthmm	—	—	255	305	—
Head tube lengthmm	—	—	100	90	—
Head tube angle	—	—	68°	68°	—
Seat tube angle	—	—	71°	72°	—
Chainstay lengthmm	—	—	360	380	—
Wheelbasemm	—	—	882	940	—
Front centermm	—	—	523	564	—
Bottom bracket dropmm	—	—	15	40	—
Standover heightmm	—	—	593	673	—
Fork rakemm	—	—	39	38	—
Stack/reach ratio	—	—	1.37	1.41	—

Not published by the manufacturer: Bottom bracket height, Trail, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum

Suspension

Suspension configuration: Hardtail
Front travel: 65 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 28
Largest chainring: 28
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 32
Lowest gear: 21.0 in
Highest gear: 61.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Fork spring: Air
Tire width: 1.9″
Wheel material: Aluminum
Wheel size: 20″, 24″

Technical analysis

2 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

21.0 gear inches

This value is within the central range for this class.

Cohort: Youth / Mountain youth Model year: 2018
Sample: 66 bicycles with this information
Coverage: 90.4% of the class

Highest gear

61.1 gear inches

This value is within the central range for this class.

Cohort: Youth / Mountain youth Model year: 2018
Sample: 66 bicycles with this information
Coverage: 90.4% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 8.0 km/h
Highest gear: 23.4 km/h

Total gear range 291%

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: 21.0–61.1 gear inches
Class reference (p10–p90): 16.9–75.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Youth / Mountain youth Model year: 2018
Lowest gear: 66 bicycles with this information, 90.4% of the class
Highest gear: 66 bicycles with this information, 90.4% of the class

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 2018 builds
Specification	This bicycle Rocky Mountain Vertex 20	Rocky Mountain Vertex 24	Rocky Mountain Vertex Alloy 30	Rocky Mountain Vertex Alloy 50	Rocky Mountain Vertex Carbon 50	Rocky Mountain Vertex Carbon 70
Frame
Frame material	Aluminum	Aluminum	Aluminum	Aluminum	Carbon	Carbon
Suspension
Front travel	65 mm	65 mm	100 mm	100 mm	100 mm	100 mm
Drivetrain
Front chainrings	1	1	2	2	2	1
Smallest chainring	28	28	28	28	28	32
Largest chainring	28	28	38	38	38	32
Rear sprockets	9	9	11	Not informed	11	12
Smallest sprocket	11	11	11	11	11	10
Largest sprocket	32	36	40	40	40	50
Lowest gear	21.0 in	22.6 in	20.3 in	20.3 in	20.3 in	18.6 in
Highest gear	61.1 in	73.8 in	100.2 in	100.2 in	100.2 in	92.8 in
Other specifications
Bottom bracket standard	BSA	BSA	BB86/BB92	BB86/BB92	BB86/BB92	BB86/BB92
Tire width	1.9″	2.1″	2.2″	2.2″	2.2″	2.2″
Wheel size	20″ / 24″	29″	29″	29″	29″	29″

Changes since 2017
Specification	2017 Rocky Mountain Vertex 20	This bicycle Rocky Mountain Vertex 20
Suspension
Front travel	50 mm	65 mm
Drivetrain
Smallest chainring	36	28
Largest chainring	36	28
Rear sprockets	1	9
Smallest sprocket	24	11
Largest sprocket	24	32
Lowest gear	30.0 in	21.0 in
Highest gear	30.0 in	61.1 in
Cockpit
Shifting	No shifting	Mechanical
Other specifications
Tire width	1.95″	1.9″
Wheel size	20″	20″ / 24″