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2021 Rocky Mountain

Vertex Jr 20

A 20″ aluminum frame mountain youth bike with mid-range components and shimano hydraulic disc brakes.
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Manufacturer Price

$739
FrameAluminum
SuspensionHardtail, 80mm
ForkSuntour XCM
Wheels20″ Aluminum
Drivetrain1 × 9
GroupsetX4, X5
BrakesShimano Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Handling
nimblestable
Vertex Jr 20
Other Mountain Youth bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

15 mph

Vertex Jr 20

Highest gear

(descending)

Reviews
Mountain Bike Action
Bike Test: Rocky Mountain Vertex

Nov 2018 · McCoy

B.C. XC in a hardtail

Read Review

BIKE Magazine
Rocky Mountain Updates the Vertex

Mar 2018

The race-ready hardtail receives a facelift.

Read Review

MTBR
2018 Rocky Mountain Vertex debuts

Mar 2018 · Mtbr

Rocky Mountain has updated the Vertex, its flagship XC-race hardtail, which is now lighter and more aggressive. - Mtbr.com

Read Review

Geometry
Specs
Build
Frame

Rocky Mountain 6061 SL Alloy. Threaded BB. Zero Stack Headtube. 20" Kid's Geometry

BB StandardBSA, Threaded

Fork

Suntour XCM JR Air 80mm

Travel80mm

Spring TypeAir

Bottom Bracket

SR Suntour Sealed Cartridge Bearing

Headset

FSA No. 10P | 5/32" X 20 Retainer Bearings

Stem

Rocky Mountain XC | 7° Rise | All Sizes = 40mm

Handlebar

Rocky Mountain XC | 600mm Width | 25mm Rise | 9° Backsweep | 5° Upsweep | 31.8mm Clamp

Saddle

Rocky Mountain Pivotal Kids

Seatpost

Rocky Mountain Pivotal 27.2mm

TypeRigid

Pedals

Composite Kids

Grips

Rocky Mountain Slide On Kids

Groupset
Rear Derailleur

SRAM X4

Crank

Rocky Mountain Microdrive 28T

Shifters

SRAM X5

Cassette

SunRace CSM98 11-36T

Chain

KMC X9

Brakes

Shimano MT200 2 Piston | Organic Pads | Shimano RT10 160mm F Rotor | Shimano RT10 160mm R Rotor

TypeShimano Hydraulic Disc

Wheels
Rims

Rocky Mountain JR25 Tubeless | Tubeless Compatible - Tape | Valves | Sealant Not Incl

Spokes

2.0 Stainless

Front Hub

Shimano TX505

Rear Hub

Shimano TX505 QR

Tires

F: Kenda Amrak 20 x 2.4 // R: Kenda Amrak 20 x 2.4

Rider Notes
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First added August 11

Last updated January 12

Not listed for 1,972 days