Diamondback Mason 2

2019 MountainTrail Manufacturer page

Last known price: $1,399

Prices shown first for United States
Fork travel: 120 mm
Wheels: 27.5″
Drivetrain: 1 × 11 30t / 11–42t
Gear range: 382%
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

Components

13 of 22 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

Mason 27.5" Plus 6061-T6 Weapons Grade Aluminum w/ Double Butted Formed Top Tube, Down Tube, Seatstays, Tapered Head Tube, ISCG-05 Tabs, 148x12mm Boost Dropouts, w/ Replaceable Hanger Not identified

ISCG-05

Suspension

1 part

Fork
- RockShox Judy

Drivetrain

6 parts

Brakes

2 parts

Wheels and tires

5 parts

Front hub

32h Alloy, Boost 110x15mm Thru-axle, Sealed Cartridge Bearings, w/ CNC Disc Mount Not identified
Rear hub
- SRAM
Rims
- Diamondback
Spokes

14g Stainless Steel Not identified
Tires
- Vee Rubber

Cockpit and contact points

7 parts

Grips

New DB "Flanged" Lock-on, 135mm Silcone Not identified
Handlebar

DB35 Alloy, 760mm Wide, 15mm Rise, 35mm Bar Bore Not identified
Headset
- FSA
Pedals

DB4L Alloy Platform w/ Replaceable Pins Not identified
Saddle

DB Race M-series Saddle Not identified
Seatpost

JD 7075 Alloy Internal Dropper, w/ 1x Lever, 30.9mm Not identified
Stem

DB35 Alloy, 60mm, 35mm Bar Bore Not identified

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 435mm

Stack 590mm

Wheelbase 1128mm

Head angle 68.0°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	421	435	451	463
Stackmm	604	590	604	617
Top tube lengthmm	590	605	625	640
Seat tube lengthmm	420	460	510	560
Head tube lengthmm	110	110	125	140
Head tube angle	68°	68°	68°	68°
Seat tube angle	74°	74°	74°	74°
Chainstay lengthmm	435	435	435	435
Wheelbasemm	1113	1128	1150	1167
Front centermm	684	699	721	738
Bottom bracket dropmm	55	55	55	55
Bottom bracket heightmm	300	300	300	300
Standover heightmm	727	752	788	823
Fork rakemm	51	51	51	51
Trailmm	105	98	98	98
Stack/reach ratio	1.44	1.36	1.34	1.33
Suspension and parts
Crank lengthmm	170	175	175	175
Handlebar widthmm	760	760	760	760
Stem lengthmm	60	60	60	60

Not published by the manufacturer: Front travel, Rear travel, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

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

Suspension

Suspension configuration: Hardtail
Front travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 30
Largest chainring: 30
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 42
Lowest gear: 19.6 in
Highest gear: 75.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Air
Tire width: 2.8″
Wheel material: Aluminum
Wheel size: 27.5″

Technical analysis

4 measures

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

Front travel

120 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 986 bicycles with this information
Coverage: 96.6% of the class

Lowest gear

19.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 968 bicycles with this information
Coverage: 94.9% of the class

Highest gear

75.0 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2019
Sample: 968 bicycles with this information
Coverage: 94.9% of the class

Shifting

Mechanical

34 of 1,020 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2019
Sample: 1,020 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.5 km/h
Highest gear: 28.7 km/h

Total gear range 382%

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: 19.6–75.0 gear inches
Class reference (p10–p90): 16.5–92.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2019
Lowest gear: 968 bicycles with this information, 94.9% of the class
Highest gear: 968 bicycles with this information, 94.9% 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 2019 builds
Specification	This bicycle Diamondback Mason 2	Diamondback Mason 1
Drivetrain
Rear sprockets	11	10
Brakes
Brake type	Hydraulic disc	Mechanical disc
Cockpit
Seatpost	Dropper seatpost	Rigid seatpost
Other specifications
Fork spring	Air	Coil
Tire width	2.8″	3″