Polygon Helios A7

Name: Polygon Helios A7
Brand: Polygon

2026 RoadRace Manufacturer page

Last known price: $3,999

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

Sizes

Size guide

XXXS
XXS
XS
SM
MD
LG
XL

The manufacturer did not publish rider heights for these sizes.

Components

13 of 21 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 Performance Carbon, UCI Approved, Full Internal Routing, UDH (Universal Derailleur Hanger) Not identified

Suspension

1 part

Fork

ACX Performance Carbon, Tapered Steerer 1-1/8" to 1-1/2", UCI Approved Not identified

Drivetrain

7 parts

Cassette
- Shimano 105 CS-R7101-12 12 speeds 11–34t
CS-R7101-12
Chain
- KMC
Chain guide
- Shimano
BR-R7170
Crankset

52/36T, Hollowtech II, Maximum Supported: 53/39T Not identified
Front derailleur
- Shimano 105 FD-R7150 2 speeds
FD-R7150
Rear derailleur
- Shimano 105 RD-R7150 12 speeds
RD-R7150
Shifters
- Shimano 105 ST-R7170
ST-R7170

Brakes

2 parts

Wheels and tires

4 parts

Front hub
- Sapim
Rear hub
- Shimano
Rims

LINC Beta 45 Carbon Disc, 700C, 45mm Depth, 22mm Internal Width, 30mm External Width, F: 20H / R: 24H, Total Weight: 1500g (700g Front / 800g Rear), Tubeless Ready ( Tubeless Tape Installed ) ** Not identified
Tires
- Pirelli

Cockpit and contact points

6 parts

Grips

Bar Tape (Black), Performance Road Wrap Not identified
Handlebar
- Polygon
Headset

Integrated (IS), Sealed Bearings, S.H.I.S: IS 52/28.6 Not identified
Saddle

LINC Flux2, Cr-Mo Rails Ø7mm Not identified
Seatpost

Carbon, Aero Shape, 35x351mm, Adjustable Offset Not identified
Stem
- Polygon

Sizes and geometry

7 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size SM

Table

Reach 390mm

Stack 523mm

Wheelbase 985mm

Head angle 72.3°

Seat angle 74.0°

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 Reach Stack

Complete manufacturer geometry table 7 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	370	375	385	390	400	405	420
Stackmm	493	503	511	523	533	551	571
Top tube lengthmm	502	513	529	540	556	570	598
Seat tube lengthmm	395	420	457	489	499	518	536
Head tube lengthmm	90	100	110	120	130	150	170
Head tube angle	71°	71.3°	71.5°	72.3°	72.5°	72.8°	73°
Seat tube angle	75°	75°	74°	74°	74°	73°	73°
Chainstay lengthmm	410	410	410	410	410	410	410
Wheelbasemm	969	976	988	985	996	1005	1024
Front centermm	572	579	590	586	597	606	624
Bottom bracket dropmm	78	78	75.5	73	73	71.5	71.5
Standover heightmm	662	685	720	752	761	780	799
Fork rakemm	51	52	51	46	45	46	45
Trailmm	62	59	59	59	59	56	56
Stack/reach ratio	1.33	1.34	1.33	1.34	1.33	1.36	1.36
Suspension and parts
Crank lengthmm	165	165	165	170	170	172.5	175
Handlebar widthmm	400	400	400	420	420	440	440
Stem lengthmm	90	100	100	110	110	120	120

Not published by the manufacturer: Bottom bracket height, 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: 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

Derailleur hanger: UDH
Seatpost: Rigid seatpost
Shifting: Electronic

Additional specifications

Tire clearance: Maximum tire width: 34c; Additional specification: Wheel kind: 700
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

30.7 gear inches

This value is within the central range for this class.

Cohort: Road / Race Model year: 2026
Sample: 720 bicycles with this information
Coverage: 78.6% of the class

Highest gear

137.1 gear inches

This value is within the central range for this class.

Cohort: Road / Race Model year: 2026
Sample: 720 bicycles with this information
Coverage: 78.6% of the class

Shifting

Electronic

632 of 913 bicycles with this information use electronic shifting.

Cohort: Road / Race Model year: 2026
Sample: 913 bicycles with this information
Coverage: 99.7% 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
Class reference (p10–p90): 27.4–139.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Race Model year: 2026
Lowest gear: 720 bicycles with this information, 78.6% of the class
Highest gear: 720 bicycles with this information, 78.6% 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 Helios A7	Polygon Helios A0	Polygon Helios A0 AXS	Polygon Helios A7 Di2	Polygon Helios A8	Polygon Helios A8 Di2
Drivetrain
Smallest chainring	36	35	35	36	36	36
Largest chainring	52	48	48	52	52	52
Smallest sprocket	11	10	10	11	11	11
Largest sprocket	34	33	33	34	34	34
Lowest gear	30.7 in	30.8 in	30.8 in	30.7 in	30.7 in	30.7 in
Highest gear	137.1 in	139.2 in	139.2 in	137.1 in	137.1 in	137.1 in
Cockpit
Derailleur hanger	UDH	UDH	Not informed	Not informed	UDH	Not informed
Other specifications
Tire clearance	Maximum tire width: 34c; Additional specification: Wheel kind: 700	Maximum tire width: 34c; Additional specification: Wheel kind: 700	Not informed	Not informed	Maximum tire width: 34c; Additional specification: Wheel kind: 700	Not informed
Tire width	28c	30c	30c	28c	28c	28c
Bottom bracket standard	Not informed	Not informed	T47	T47	Not informed	T47
Power meter	Not informed	Not informed	SRAM RED E1 48/35T POWER METERAdditional specification: Model display: Red AXSAdditional specification: Model id: red-axs	Not informed	Not informed	Not informed

Changes since 2025
Specification	2025 Polygon Helios A7	This bicycle Polygon Helios A7
Frame
Bicycle weight	9.1 kg	Not informed
Drivetrain
Rear sprockets	11	12
Largest sprocket	30	34
Lowest gear	34.8 in	30.7 in
Other specifications
Bottom bracket standard	BB86/BB92	Not informed