Polygon Strattos C8

Name: Polygon Strattos C8
Brand: Polygon

2025 RoadEndurance Manufacturer page

Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 12 34–50t / 11–34t
Gear range: 455%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XXS 151–161
XS 154–164
SM 162–170
MD 168–176
LG 174–182
XL 179–187
XXL 185–195

Components

12 of 19 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 All-Round, Carbon, All-Round 700C, Internal Cable Routing, Integrated Seat Clamp w/ Bolt, 12x142mm Thru Axle, UDH Hanger, Flat-Mount Disc Brake Not identified

Suspension

1 part

Fork

ACX All-Round, Full Carbon, Tapered Steerer 1-1/8"–1-1/2", 12x100mm Thru Axle, Flat-Mount Disc, Full Internal Brake & Shifter Routing Not identified

Drivetrain

6 parts

Cassette
- Shimano Ultegra CS-R8101-12 12 speeds
CS-R8101-12
Chain
- KMC
Crankset

50/34T, Max Chainring: 53/39T Not identified
Front derailleur
- Shimano Ultegra FD-R8150 2 speeds
FD-R8150
Rear derailleur
- Shimano Ultegra RD-R8150 12 speeds
RD-R8150
Shifters
- Shimano Ultegra ST-R8170
ST-R8170

Brakes

2 parts

Wheels and tires

4 parts

Cockpit and contact points

5 parts

Handlebar

Linc Carbon Integrated, Width: 380 mm (XXS–S) / 400 mm (M–L) / 420 mm (XL–XXL), Reach 75 mm, Drop 125 mm, 10° Bend Not identified
Headset

Integrated (IS) Sealed Bearings, IS 52/28.6 Top | IS 52/40 Bottom Not identified
Saddle

Linc Glyd, CR-MO Rails Ø7mm Not identified
Seatpost
- Polygon
Stem

Linc Carbon Integrated, 90 mm (XXS) / 100 mm (XS–S) / 110 mm (M–L) / 120 mm (XL–XXL) Not identified

Sizes and geometry

7 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 378mm

Stack 555mm

Wheelbase 995mm

Head angle 72.0°

Seat angle 73.5°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 7 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	355	360	369	378	387	396	405
Stackmm	516.9	531.1	544.3	555	580	605	630
Top tube lengthmm	498.4	507.2	525.1	542.4	564.3	580.97	597.61
Seat tube lengthmm	400	430	470	520	560	580	610
Head tube lengthmm	100	115	125	136	162	191	217
Head tube angle	70.5°	70.5°	71.5°	72°	72°	72°	72°
Seat tube angle	74.5°	74.5°	74°	73.5°	73°	73°	73°
Chainstay lengthmm	415	415	415	415	415	415	415
Wheelbasemm	975.1	985.1	989.3	995.2	1012.3	1030.7	1047.84
Front centermm	572	582	586	591	608	626	643
Bottom bracket dropmm	76.5	76.5	76.5	74	74	71.5	71.5
Bottom bracket heightmm	268	268	268	270.5	270.5	273	273
Standover heightmm	686.1	711.4	747.4	784.5	821.7	845	868.9
Fork rakemm	53	53	53	50	50	50	50
Trailmm	64	64	58	58	58	58	58
Stack/reach ratio	1.46	1.48	1.48	1.47	1.50	1.53	1.56
Suspension and parts
Crank lengthmm	165	165	165	170	170	172.5	172.5
Handlebar widthmm	380	380	380	400	400	420	420
Stem lengthmm	90	100	100	110	110	120	120

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

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon
Fork material: Carbon

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 34
Largest chainring: 50
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 29.0 in
Highest gear: 131.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Derailleur hanger: UDH
Seatpost: Rigid seatpost
Shifting: Electronic

Additional specifications

Tire clearance: Maximum tire width: 34c
Tire width: 28c
Wheel material: Carbon
Wheel size: 700c

Technical analysis

3 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

29.0 gear inches

This value is within the central range for this class.

Cohort: Road / Endurance Model year: 2025
Sample: 546 bicycles with this information
Coverage: 81.8% of the class

Highest gear

131.8 gear inches

This value is within the central range for this class.

Cohort: Road / Endurance Model year: 2025
Sample: 546 bicycles with this information
Coverage: 81.8% of the class

Shifting

Electronic

356 of 663 bicycles with this information use electronic shifting.

Cohort: Road / Endurance Model year: 2025
Sample: 663 bicycles with this information
Coverage: 99.4% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.1 km/h
Highest gear: 50.5 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: 29.0–131.8 gear inches
Class reference (p10–p90): 26.6–139.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Endurance Model year: 2025
Lowest gear: 546 bicycles with this information, 81.8% of the class
Highest gear: 546 bicycles with this information, 81.8% 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 2025 builds

Differences across 2025 builds
Specification	This bicycle Polygon Strattos C8	Polygon Strattos C7	Polygon Strattos C7 Di2	Polygon Strattos C8 Di2	Polygon Strattos C9	Polygon Strattos C9 AXS
Drivetrain
Smallest chainring	34	34	34	34	35	35
Largest chainring	50	50	50	50	48	48
Smallest sprocket	11	11	11	11	10	10
Largest sprocket	34	34	34	34	36	36
Lowest gear	29.0 in	29.0 in	29.0 in	29.0 in	28.2 in	28.2 in
Highest gear	131.8 in	131.8 in	131.8 in	131.8 in	139.2 in	139.2 in
Cockpit
Derailleur hanger	UDH	UDH	Not informed	Not informed	UDH	Not informed
Other specifications
Tire clearance	Maximum tire width: 34c	Maximum tire width: 34c	Not informed	Not informed	Maximum tire width: 34c	Not informed
Bottom bracket standard	Not informed	Not informed	T47	T47	Not informed	T47