Jamis Faultline A1

2021 MountainCross-country

Last known price: $2,599

Prices shown first for United States
Travel: 130 / 115 mm Fork / rear shock
Wheels: 29″
Drivetrain: 1 × 12 32t / 10–51t
Gear range: 510%
Weight: 14.97 kg 33.0 lb · Reference configuration not specified
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

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

Triple-butted 6061 alloy, 115mm travel mp2 suspension, 1.5 – 1 1/8” tapered head tube, asymmetrical chainstays w/12x148mm thru-axle dropout, internal dropper post routing, ISCG05 chainguide mount, Rock Shox Deluxe Select+ RL air shock with rebound adjust & lock out, replaceable derailleur hanger Not identified

Suspension

1 part

Fork
- RockShox 35 Gold RL

Drivetrain

6 parts

Bottom bracket
- Race Face
Cassette
- Shimano SLX CS-M7100-12 12 speeds 10–51t
CS-M7100-12
Chain
- KMC
Crankset
- Race Face Ride 32t
Rear derailleur
- Shimano SLX RD-M7100 12 speeds
RD-M7100
Shifters
- Shimano SLX SL-M7100
SL-M7100

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

Enter your height to highlight matching ranges.

Size MD

Table

Reach 438mm

Stack 621mm

Wheelbase 1179mm

Head angle 67.5°

Seat angle 74.5°

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 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	415	438	460	483
Stackmm	611	621	630	639
Top tube lengthmm	585	610	635	660
Seat tube lengthmm	394	432	483	533
Head tube lengthmm	105	115	125	135
Head tube angle	67.5°	67.5°	67.5°	67.5°
Seat tube angle	74.5°	74.5°	74.5°	74.5°
Chainstay lengthmm	445	445	445	445
Wheelbasemm	1153	1179	1205	1232
Front centermm	710	736	762	789
Bottom bracket dropmm	35	35	35	35
Bottom bracket heightmm	339	339	339	339
Standover heightmm	713	739	725	725
Fork rakemm	52	50	51	51
Trailmm	99	101	100	100
Stack/reach ratio	1.47	1.42	1.37	1.32

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: Aluminum
Bicycle weight: 14.97 kg

33.0 lb

Suspension

Suspension configuration: Full suspension
Front travel: 130 mm
Rear travel: 115 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 12
Smallest sprocket: 10
Largest sprocket: 51
Lowest gear: 18.2 in
Highest gear: 92.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Fork spring: Air
Tire width: 2.35″
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

130 mm

This value is above the central range for this class.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,256 bicycles with this information
Coverage: 91.6% of the class

Lowest gear

18.2 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,101 bicycles with this information
Coverage: 80.3% of the class

Highest gear

92.8 gear inches

This value is within the central range for this class.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,101 bicycles with this information
Coverage: 80.3% of the class

Shifting

Mechanical

89 of 1,368 bicycles with this information use electronic shifting.

Cohort: Mountain / Cross-country Model year: 2021
Sample: 1,368 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.0 km/h
Highest gear: 35.5 km/h

Total gear range 510%

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: 18.2–92.8 gear inches
Class reference (p10–p90): 17.4–100.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Cross-country Model year: 2021
Lowest gear: 1101 bicycles with this information, 80.3% of the class
Highest gear: 1101 bicycles with this information, 80.3% 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 2021 builds
Specification	This bicycle Jamis Faultline A1	Jamis Faultline A2
Frame
Fork material	Aluminum	Steel
Bicycle weight	14.97 kg	15.42 kg
Drivetrain
Rear sprockets	12	11
Smallest sprocket	10	11
Highest gear	92.8 in	84.4 in

Changes since 2020
Specification	2020 Jamis Faultline A1	This bicycle Jamis Faultline A1
Frame
Fork material	Magnesium	Aluminum
Drivetrain
Smallest sprocket	11	10
Largest sprocket	50	51
Lowest gear	18.6 in	18.2 in
Highest gear	84.4 in	92.8 in
Other specifications
Bottom bracket standard	Not informed	BSA