2020 Rocky Mountain

Vertex Jr 20

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

$689
FrameAluminum
SuspensionHardtail, 80mm
ForkSuntour XCM
Wheels20″ Aluminum
Drivetrain1 × 9
GroupsetX4, X5
BrakesHydraulic Disc
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Insights
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

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

Read Review

Geometry
99 Spokes on YouTube99 Spokes on YouTube
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

Stem

Rocky Mountain XC

Handlebar

Rocky Mountain XC 600mm

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 9 Spd

Crank

Rocky Mountain Microdrive 28T

Shifters

SRAM X5

Cassette

SunRace CSM98 11-36T 9 Spd

Chain

KMC X9

Brakes

Shimano MT200 2 Piston

TypeHydraulic Disc

Brake Levers

Shimano MT200

Wheels
Rims

WTB SX17

Spokes

2.0 Stainless

Front Hub

Shimano TX505

Rear Hub

Shimano TX505

Tires

VeeTire Crown GEM 20x2.25

Rider Notes
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Last updated April 14
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