Rocky Mountain Vertex Alloy 50

2018 MountainCross-country

Last known price: $2,149

Prices shown first for United States
Fork travel: 100 mm
Wheels: 29″
Gear range: 494%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 156–166
SM 163–174
MD 171–182
LG 179–189
XL 185–195

Components

19 of 21 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 Series Alloy. BB92 Press Fit BB. Zero Stack Tapered Headtube. Internal Cable Routing Not identified

Suspension

1 part

Fork
- RockShox Reba RL

Drivetrain

7 parts

Brakes

1 part

Brakes
- Shimano SLX

Wheels and tires

5 parts

Front hub
- Shimano Deore HB-M618
HB-M618
Rear hub
- Shimano FH-M615
FH-M615
Rims

Sun Helix TR25 SL - Tubeless Compatible - Tape | Valves | Sealant Not Incl Not identified
Spokes
- WTB
Tires
- Maxxis

Cockpit and contact points

6 parts

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 405mm

Stack 612mm

Wheelbase 1087mm

Head angle 70.3°

Seat angle 73.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 29″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	381	384	405	424	442
Stackmm	587	607	612	626	640
Top tube lengthmm	550	570	592	615	638
Seat tube lengthmm	355	394	432	470	508
Head tube lengthmm	100	105	110	115	130
Head tube angle	69.5°	70.25°	70.25°	70.25°	70.25°
Seat tube angle	74°	73°	73°	73°	73°
Chainstay lengthmm	435	435	435	435	435
Wheelbasemm	1068	1065	1087	1111	1134
Front centermm	639	636	658	682	705
Bottom bracket dropmm	56	56	56	56	56
Bottom bracket heightmm	318	318	318	318	318
Standover heightmm	719	738	752	776	808
Fork rakemm	53	49	48	48	48
Trailmm	83	82	83	83	83
Stack/reach ratio	1.54	1.58	1.51	1.48	1.45

Not published by the manufacturer: 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: 100 mm

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 28
Largest chainring: 38
Smallest sprocket: 11
Largest sprocket: 40
Lowest gear: 20.3 in
Highest gear: 100.2 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: BB86/BB92
Fork spring: Air
Tire width: 2.2″
Wheel material: Aluminum
Wheel size: 29″

Technical analysis

4 measures

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

Front travel

100 mm

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2018
Sample: 771 bicycles with this information
Coverage: 97.9% of the class

Lowest gear

20.3 gear inches

This value is above the central range for this class.

Cohort: Mountain / Cross-country Model year: 2018
Sample: 724 bicycles with this information
Coverage: 91.9% of the class

Highest gear

100.2 gear inches

This value is above the central range for this class.

Cohort: Mountain / Cross-country Model year: 2018
Sample: 724 bicycles with this information
Coverage: 91.9% of the class

Shifting

Mechanical

18 of 787 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2018
Sample: 787 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.8 km/h
Highest gear: 38.4 km/h

Total gear range 493%

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: 20.3–100.2 gear inches
Class reference (p10–p90): 16.5–105.0 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2018
Lowest gear: 724 bicycles with this information, 91.9% of the class
Highest gear: 724 bicycles with this information, 91.9% 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

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