Polygon Helios A8X

2024 RoadRace Manufacturer page

Last known price: $4,699

Prices shown first for United States
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 12 36–52t / 11–34t
Gear range: 446%
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

Components

13 of 22 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

Fork

ACX PERFORMANCE UCI APPROVED, TAPER 1-1/8" TO 1-1/2" Not identified
Rear shock

None

Drivetrain

7 parts

Bottom bracket
- Shimano SM-BB92-41B
SM-BB92-41B
Cassette
- Shimano Ultegra CS-R8100-12 11–34t
CS-R8100-12
Chain

12-SPEED CHAIN Not identified
Crankset
- Shimano Ultegra FC-R8100 52/36t
FC-R8100
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

3 parts

Wheels and tires

5 parts

Front hub

ALLOY THRU AXLE 12x100mm 24H SEALED BEARINGS CENTER LOCK Not identified
Rear hub

ALLOY THRU AXLE 12x142mm 24H SEALED BEARINGS CENTER LOCK Not identified
Rims

CARBON 622-19 24H FOR TYRE 622-28/62 DISC TUBELESS READY Not identified
Spokes

STAINLESS STRAIGHT PULL BUTTE Not identified
Tires
- Schwalbe One

Cockpit and contact points

6 parts

Handlebar
- Vision
Headset

INTEGRATED (IS) SEALED BEARING FOR OS HEAD TUBE, IS 52/28.6 | IS 52/40 Not identified
Pedals

None
Saddle
- Entity
Seatpost

CARBON, AERO 35 x 337mm (XS) / 357mm (S, M, L, XL) Not identified
Stem
- Vision

Sizes and geometry

6 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size SM

Table

Reach 380mm

Stack 535mm

Wheelbase 984mm

Head angle 72.0°

Seat angle 74.3°

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 6 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	370	375	380	385	390	395
Stackmm	505	520.21	535.2	550.4	564.7	580.8
Top tube lengthmm	505.31	517.31	530.42	543.04	555.14	569.25
Seat tube lengthmm	450	475	500	520	545	570
Head tube lengthmm	100	115	130	145	160	175
Head tube angle	71.5°	71.8°	72°	72.3°	72.3°	72.8°
Seat tube angle	75°	74.7°	74.3°	74°	73.7°	73.3°
Chainstay lengthmm	415	415	415	415	415	415
Wheelbasemm	968.42	975.82	983.9	991.1	1000.62	1005.8
Front centermm	565	572	580	587	597	602
Bottom bracket dropmm	73	73	73	73	73	73
Bottom bracket heightmm	271	271	271	271	271	271
Standover heightmm	715.04	739.4	763.21	780.8	802.52	824.28
Fork rakemm	43	43	43	43	43	43
Trailmm	67	65	64	62	62	59
Stack/reach ratio	1.37	1.39	1.41	1.43	1.45	1.47
Suspension and parts
Crank lengthmm	170	170	170	170	172.5	172.5
Handlebar widthmm	400	400	400	420	420	420
Stem lengthmm	100	100	100	110	110	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
Frame weight: 0.77 kg

1.7 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 36
Largest chainring: 52
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 34
Lowest gear: 30.7 in
Highest gear: 137.1 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Electronic

Additional specifications

Bottom bracket standard: BB86/BB92
Tire width: 28c
Wheel material: Carbon
Wheel size: 700c

Technical analysis

1 measure

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

Shifting

Electronic

774 of 1,186 bicycles with this information use electronic shifting.

Cohort: Road / Race Model year: 2024
Sample: 1,186 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.8 km/h
Highest gear: 52.5 km/h

Total gear range 446%

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: 30.7–137.1 gear inches

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 2024 builds
Specification	This bicycle Polygon Helios A8X	Polygon Helios A0	Polygon Helios A7	Polygon Helios A7X	Polygon Helios A8	Polygon Helios A9
Frame
Frame weight	0.77 kg	Not informed	Not informed	Not informed	Not informed	Not informed
Bicycle weight	Not informed	Not informed	8.5 kg	8.1 kg	Not informed	Not informed
Drivetrain
Smallest chainring	36	35	36	34	36	36
Largest chainring	52	48	52	50	52	52
Rear sprockets	12	12	11	12	11	12
Smallest sprocket	11	10	11	11	11	11
Largest sprocket	34	33	30	34	34	34
Lowest gear	30.7 in	30.8 in	34.8 in	29.0 in	30.7 in	30.7 in
Highest gear	137.1 in	139.2 in	137.1 in	131.8 in	137.1 in	137.1 in
Cockpit
Shifting	Electronic	Electronic	Mechanical	Electronic	Electronic	Electronic
Derailleur hanger	Not informed	UDH	UDH	Not informed	UDH	UDH
Other specifications
Bottom bracket standard	BB86/BB92	Not informed	BB86/BB92	BSA	BB86/BB92	Not informed
Tire width	28c	30c	28c	28c	28c	28c
Tire clearance	Not informed	Maximum tire width: 34c; Additional specification: Wheel kind: 700	Maximum tire width: 28c; Additional specification: Wheel kind: 700	Not informed	Maximum tire width: 34c; Additional specification: Wheel kind: 700	Maximum tire width: 34c; Additional specification: Wheel kind: 700