Polygon Syncline C3

2026 MountainTrail Manufacturer page

Last known price: $1,249

Prices shown first for United States
Fork travel: 120 mm
Wheels: 27.5″, 29″
Drivetrain: 1 × 12 32t / 11–51t
Gear range: 464%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 155–166
MD 164–176
MD 164–176
LG 174–186
XL 184–195

Components

15 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

carbon Not identified

Suspension

2 parts

Drivetrain

6 parts

Bottom bracket
- Shimano BB-MT500-PA
BB-MT500-PA
Cassette

12 SPEED 11-51T Not identified
Chain
- KMC
X-12
Crankset
- Shimano FC-MT510-1 12 speeds 32t
FC-MT510
Rear derailleur
- Shimano Deore RD-M6100-SGS 12 speeds
RD-M6100-SGS
Shifters
- Shimano Deore SL-M6100-R 12 speeds
SL-M6100

Brakes

3 parts

Brake levers
- Shimano BL-MT201
BL-MT201
Brakes
- Shimano
BR-MT201
Disc rotors
- Shimano SM-RT10
SM-RT10

Wheels and tires

4 parts

Front hub
- Shimano HB-MT400-B
HB-MT400
Rear hub
- Shimano FH-MT510-B
FH-MT510
Rims

584-30 / 622-30 32H FOR TYRE 584 / 622-54/76 TUBELESS READY Not identified
Tires
- WTB Trail Boss

Cockpit and contact points

5 parts

Handlebar
- Entity
Headset

INTEGRATED W/ SEALED BEARING FOR TAPER HEAD TUBE, IS 42/28.6 | IS 52/40 Not identified
Pedals

ALLOY CAGE PEDAL W/ REFLECTOR Not identified
Saddle
- Entity
Seatpost
- 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
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	64	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

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: Carbon

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: 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

Fork spring: Air
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: 2026
Sample: 1,644 bicycles with this information
Coverage: 96.3% of the class

Lowest gear

18.2 gear inches

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,229 bicycles with this information
Coverage: 72.0% of the class

Highest gear

84.4 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,229 bicycles with this information
Coverage: 72.0% of the class

Shifting

Mechanical

389 of 1,706 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2026
Sample: 1,706 bicycles with this information
Coverage: 100.0% 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): 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: 2026
Lowest gear: 1229 bicycles with this information, 72.0% of the class
Highest gear: 1229 bicycles with this information, 72.0% 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 2026 builds
Specification	This bicycle Polygon Syncline C3	Polygon Syncline C5	Polygon Syncline DR6	Polygon Syncline DR8	Polygon Syncline DR9	Polygon Syncline DR9 Di2
Suspension
Suspension configuration	Hardtail	Hardtail	Full suspension	Full suspension	Full suspension	Full suspension
Rear travel	Not informed	Not informed	110 mm	110 mm	110 mm	110 mm
Drivetrain
Smallest chainring	32	32	32	32	34	34
Largest chainring	32	32	32	32	34	34
Smallest sprocket	11	11	10	10	10	10
Lowest gear	18.2 in	18.2 in	18.2 in	18.2 in	19.3 in	19.3 in
Highest gear	84.4 in	84.4 in	92.8 in	92.8 in	98.6 in	98.6 in
Cockpit
Seatpost	Rigid seatpost	Rigid seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost	Dropper seatpost
Shifting	Mechanical	Mechanical	Mechanical	Mechanical	Electronic	Electronic
Derailleur hanger	Not informed	Not informed	UDH	UDH	UDH	UDH
Other specifications
Suspension	Hardtail	Hardtail	Full suspension	Full suspension	Full suspension	Full suspension
Tire width	2.25″	2.25″	2.35″	2.35″	2.35″	2.35″
Wheel material	Aluminum	Aluminum	Aluminum	Carbon	Carbon	Carbon
Wheel size	27.5″ / 29″	27.5″ / 29″	29″	29″	29″	29″
Bottom bracket standard	Not informed	Not informed	BSA	BSA	Not informed	BSA
Tire clearance	Not informed	Not informed	Maximum tire width: 2.35″	Maximum tire width: 2.35″	Maximum tire width: 2.35″	Maximum tire width: 2.35″