Polygon Helios LT8 Disc

2021 RoadRace Manufacturer page

Last known price: $2,499

Prices shown first for United States
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 11 34–50t / 11–28t
Gear range: 374%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

XS 150–161
SM 159–170
MD 165–175
LG 170–180

Components

12 of 15 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 LIGHTWEIGHT CARBON FRAME, INTERNAL ROUTE Not identified

Suspension

2 parts

Fork

ACX LIGHTWEIGHT CARBON FORK Not identified
Rear shock

None

Drivetrain

6 parts

Bottom bracket
- Shimano
Cassette
- Shimano Ultegra CS-R8000 11 speeds 11–28t
CS-R8000
Chain
- KMC X11 11 speeds
X-11
Crankset
- Shimano Ultegra FC-R8000
FC-R8000
Rear derailleur
- Shimano Ultegra RD-R8000 11 speeds
RD-R8000
Shifters
- Shimano Ultegra ST-R8000
ST-R8000

Brakes

1 part

Brakes
- Shimano Ultegra BR-R8000
BR-R8000

Wheels and tires

2 parts

Rims
- Fulcrum
Tires

PERFORMANCE TIRES, 700X28C Not identified

Cockpit and contact points

5 parts

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size SM

Table

Reach 383mm

Stack 525mm

Wheelbase 988mm

Head angle 72.0°

Seat angle 73.8°

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 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	376.5	382.5	387.9	396.7
Stackmm	507.2	524.9	547.3	568.2
Top tube lengthmm	520	535	550	565
Seat tube lengthmm	465	500	530	560
Head tube lengthmm	110	125	145	165
Head tube angle	71°	72°	73°	73.5°
Seat tube angle	74.2°	73.8°	73.5°	73.5°
Chainstay lengthmm	415	415	415	415
Wheelbasemm	984.8	987.8	991	1001
Front centermm	579	582	586	596
Bottom bracket dropmm	68	68	68	68
Bottom bracket heightmm	271.5	271.5	271.5	271.5
Standover heightmm	710.6	732.8	760.2	786.7
Fork rakemm	45	45	45	45
Trailmm	68	62	56	53
Stack/reach ratio	1.35	1.37	1.41	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
Fork material: Carbon

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 34
Largest chainring: 50
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 28
Lowest gear: 35.2 in
Highest gear: 131.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BB86/BB92
Tire width: 28c
Wheel material: Aluminum
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

35.2 gear inches

This value is above the central range for this class.

Cohort: Road / Race Model year: 2021
Sample: 506 bicycles with this information
Coverage: 79.3% of the class

Highest gear

131.8 gear inches

This value is within the central range for this class.

Cohort: Road / Race Model year: 2021
Sample: 506 bicycles with this information
Coverage: 79.3% of the class

Shifting

Mechanical

286 of 638 bicycles with this information use electronic shifting.

Cohort: Road / Race Model year: 2021
Sample: 638 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 13.5 km/h
Highest gear: 50.5 km/h

Total gear range 374%

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: 35.2–131.8 gear inches
Class reference (p10–p90): 30.8–139.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Race Model year: 2021
Lowest gear: 506 bicycles with this information, 79.3% of the class
Highest gear: 506 bicycles with this information, 79.3% 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
Specification	This bicycle Polygon Helios LT8 Disc	Polygon Helios LT8
Drivetrain
Smallest chainring	34	Not informed
Largest chainring	50	Not informed
Lowest gear	35.2 in	Not informed
Highest gear	131.8 in	Not informed
Brakes
Brake type	Hydraulic disc	Rim brake