Polygon Syncline C2

2021 MountainTrail Manufacturer page

Last known price: $1,349

Prices shown first for United States
Fork travel: 120 mm
Wheels: 27.5″, 29″
Drivetrain: 1 × 11 32t / 11–51t
Gear range: 464%
Weight: 12.9 kg 28.4 lb · Reference configuration not specified
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–169
MD 166–176
MD 168–179
LG 176–187
XL 184–195

Components

16 of 20 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

ACX XC PERFORMANCE Not identified

Suspension

2 parts

Fork
- SR Suntour XCR32
Rear shock

None

Drivetrain

7 parts

Bottom bracket
- Shimano BB-MT500
BB-MT500
Cassette
- Shimano Deore CS-M5100-11 11 speeds 11–51t
CS-M5100-11CS-M5100
Chain
- KMC X11 11 speeds
Chain guide

None
Crankset
- Shimano Deore FC-M5100 11 speeds 32t
FC-M5100
Rear derailleur
- Shimano Deore RD-M5100 11 speeds
RD-M5100
Shifters
- Shimano Deore SL-M5100
SL-M5100

Brakes

3 parts

Brake levers

INCLUDE BRAKE Not identified
Brakes
- Shimano BR-MT200
BR-MT200
Disc rotors
- Shimano SM-RT10
SM-RT10

Wheels and tires

4 parts

Front hub
- Shimano HB-MT400
HB-MT400
Rear hub
- Shimano FH-MT400
FH-MT400
Rims

ALLOY DOUBLE WALL 32H Not identified
Tires
- WTB Trail Boss

Cockpit and contact points

6 parts

Handlebar
- Entity
Headset

FP-H869 TAPERED ID: 42/52MM Not identified

FP-H869
Pedals

None
Saddle
- Entity
Seatpost
- Entity
Stem
- Entity

Sizes and geometry

5 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 430mm

Stack 633mm

Wheelbase 1150mm

Head angle 67.0°

Seat angle 75.3°

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
Frame
Reachmm	410	430	430	450	470
Stackmm	596.6	615	633.2	651.6	670
Top tube lengthmm	569	594.6	597.7	621	649.15
Seat tube lengthmm	380	420	420	460	500
Head tube lengthmm	100	120	100	120	140
Head tube angle	67°	67°	67°	67°	67°
Seat tube angle	75.3°	75.3°	75.3°	75.3°	75.3°
Chainstay lengthmm	425	425	435	435	435
Wheelbasemm	1106.94	1134.8	1149.5	1176.9	1204.76
Front centermm	686	714	722	750	777
Bottom bracket dropmm	45	45	65	65	65
Bottom bracket heightmm	308.5	308.5	307.5	307.5	307.5
Standover heightmm	690.9	729.2	730.8	763.7	779.2
Fork rakemm	37	37	44	44	44
Trailmm	111	111	111	111	111
Stack/reach ratio	1.46	1.43	1.47	1.45	1.43
Suspension and parts
Front travelmm	120	120	120	120	120
Crank lengthmm	170	170	170	175	175

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

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Bicycle weight: 12.9 kg

28.4 lb

Suspension

Suspension configuration: Hardtail
Front travel: 120 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 51
Lowest gear: 18.2 in
Highest gear: 84.4 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 2.25″
Wheel material: Aluminum
Wheel size: 27.5″, 29″

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: 2021
Sample: 1,325 bicycles with this information
Coverage: 98.1% of the class

Lowest gear

18.2 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,138 bicycles with this information
Coverage: 84.2% of the class

Highest gear

84.4 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,138 bicycles with this information
Coverage: 84.2% of the class

Shifting

Mechanical

53 of 1,347 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,347 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 7.0 km/h
Highest gear: 32.3 km/h

Total gear range 464%

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: 18.2–84.4 gear inches
Class reference (p10–p90): 16.9–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2021
Lowest gear: 1138 bicycles with this information, 84.2% of the class
Highest gear: 1138 bicycles with this information, 84.2% 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

Differences across 2021 builds
Specification	This bicycle Polygon Syncline C2	Polygon Syncline C3	Polygon Syncline C5
Frame
Bicycle weight	12.9 kg	12.6 kg	11.9 kg
Drivetrain
Rear sprockets	11	12	12
Smallest sprocket	11	10	10
Highest gear	84.4 in	92.8 in	92.8 in
Other specifications
Fork spring	Not informed	Air	Air