Jamis Hijack A1

2019 MountainTrail Manufacturer page

Last known price: $999

Prices shown first for United States
Fork travel: 120 mm
Wheels: 27.5″
Drivetrain: 1 × 10 32t / 11–42t
Gear range: 382%
Weight: 13.61 kg 30.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

14 of 18 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

6061 triple-butted aluminum main tubes, 1.5 - 1 1/8” tapered head tube, over-sized stays, replaceable derailleur hanger Not identified

Suspension

1 part

Fork
- SR Suntour XCR34

Drivetrain

6 parts

Bottom bracket
- SR Suntour
Cassette
- Shimano CS-HG500-10 10 speeds 11–42t
CS-HG500-10
Chain
- KMC X10 10 speeds
Crankset
- SR Suntour 32t
Rear derailleur
- Shimano Deore
Shifters
- Shimano Deore

Brakes

1 part

Brakes
- Tektro HD-M275 / HD-M276
HD-M275HD-M276

Wheels and tires

2 parts

Cockpit and contact points

7 parts

Grips

Kraton Not identified
Handlebar
- Jamis
Headset

Zero-stack internal cup threadless, 15mm cone spacer Not identified
Pedals

MTB platform, hi-impact resin Not identified
Saddle
- Jamis
Seatpost
- Jamis
Stem
- Jamis

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 433mm

Stack 617mm

Wheelbase 1138mm

Head angle 67.5°

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 Reach Stack

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	410	433	455	477
Stackmm	608	617	626	636
Top tube lengthmm	585	610	635	660
Seat tube lengthmm	381	432	483	533
Head tube lengthmm	100	110	120	130
Head tube angle	67.5°	67.5°	67.5°	67.4°
Seat tube angle	74°	74°	74°	74°
Chainstay lengthmm	425	425	425	425
Wheelbasemm	1112	1138	1164	1190
Front centermm	691	717	743	769
Bottom bracket dropmm	44	44	44	44
Bottom bracket heightmm	311	311	311	311
Standover heightmm	749	784	819	855
Fork rakemm	42	42	42	40
Trailmm	102	102	102	105
Stack/reach ratio	1.48	1.43	1.38	1.33

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
Fork material: Magnesium
Bicycle weight: 13.61 kg

30.0 lb

Suspension

Suspension configuration: Hardtail
Front travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 10
Smallest sprocket: 11
Largest sprocket: 42
Lowest gear: 21.0 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: 2.25″
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

21.0 gear inches

This value is above 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

80.0 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

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: 8.0 km/h
Highest gear: 30.6 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: 21.0–80.0 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

Differences across 2019 builds
Specification	This bicycle Jamis Hijack A1	Jamis Hijack A2
Frame
Fork material	Magnesium	Aluminum
Bicycle weight	13.61 kg	14.63 kg
Drivetrain
Front chainrings	1	2
Smallest chainring	32	24
Largest chainring	32	38
Rear sprockets	10	9
Largest sprocket	42	36
Lowest gear	21.0 in	18.3 in
Highest gear	80.0 in	95.0 in
Other specifications
Fork spring	Air	Coil