Jamis Dragonslayer 12-speed

2020 MountainTrail Manufacturer page

Last known price: $1,599

Prices shown first for United States
Fork travel: 120 mm
Wheels: 27.5″
Drivetrain: 1 × 12 32t / 11–50t
Gear range: 455%
Weight: 14.97 kg 33.0 lb · Reference configuration not specified
Frame: Steel
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

16 of 17 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

Reynolds 520 steel, 44mm head tube, 31.6 I.D. seat tube, internal dropper post routing, ISCG05, sliding 12x148mm thru-axle dropouts Not identified

Suspension

1 part

Fork
- RockShox Recon

Drivetrain

6 parts

Brakes

1 part

Brakes
- Shimano BL-MT401
BL-MT401

Wheels and tires

2 parts

Cockpit and contact points

7 parts

Sizes and geometry

4 sizes Open in the geometry plotter

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

Size 17"

Table

Reach 418mm

Stack 626mm

Wheelbase 1139mm

Head angle 68.0°

Seat angle 73.0°

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 Reach Stack

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	394	418	440	460
Stackmm	621	626	635	653
Top tube lengthmm	585	610	635	660
Seat tube lengthmm	381	432	483	533
Head tube lengthmm	95	100	110	130
Head tube angle	68°	68°	68°	68°
Seat tube angle	73°	73°	73°	73°
Chainstay lengthmm	435	435	435	435
Wheelbasemm	1113	1139	1165	1191
Front centermm	683	709	735	761
Bottom bracket dropmm	50	50	50	50
Bottom bracket heightmm	305	305	305	305
Standover heightmm	773	806	837	876
Fork rakemm	52	52	52	51
Trailmm	88	88	88	89
Stack/reach ratio	1.58	1.50	1.44	1.42

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: Steel
Fork material: Aluminum
Bicycle weight: 14.97 kg

33.0 lb

Suspension

Suspension configuration: Hardtail
Front travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 17.6 in
Highest gear: 80.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Air
Tire width: 3″
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: 2020
Sample: 1,348 bicycles with this information
Coverage: 93.8% of the class

Lowest gear

17.6 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,217 bicycles with this information
Coverage: 84.6% of the class

Highest gear

80.0 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,217 bicycles with this information
Coverage: 84.6% of the class

Shifting

Mechanical

55 of 1,437 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2020
Sample: 1,437 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.7 km/h
Highest gear: 30.6 km/h

Total gear range 455%

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: 17.6–80.0 gear inches
Class reference (p10–p90): 17.1–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2020
Lowest gear: 1217 bicycles with this information, 84.6% of the class
Highest gear: 1217 bicycles with this information, 84.6% of the class