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Today’s Deals2025 Polygon
HELIOS A7
A carbon frame race bike with upper mid-range components and shimano 105 hydraulic disc brakes.
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Manufacturer Price
$2,799| Weight | 20.1 lbs |
|---|---|
| Frame | Carbon |
| Fork | Carbon |
| Wheels | 700c Carbon |
| Drivetrain | 2 × 11 Electronic |
| Groupset | 105 Di2 |
| Brakes | Shimano 105 Hydraulic Disc |
Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.
Compare the full HELIOS model range
View Comparison4'11" – 5'4"
5'0" – 5'5"
5'3" – 5'7"
5'6" – 5'10"
5'8" – 6'0"
5'10" – 6'2"
Jun 2025 · Alvin Holbrook
The upated Polygon Helios A road bike cuts 150 grams, adds SRAM UDH and a threaded bottom, and an aim toward improved livability.
May 2025 · Alex Hunt
Polygon’s Helios A undercuts the big brands and claims to offer all-round race performance. Can it deliver on both price and ride?
Undercuts big brands on price
34 mm tyre clearance for versatility
Ability to swap between proprietary aero seatpost and standard 27.2 mm round post
Potential for greater compliance and comfort with round seatpost
Brand seemingly unsure how to define the bike (race or endurance)
Frame geometry remains fixed, limiting transformation into a true endurance bike
| Frame | carbon BB Standard: BB86/BB92, Press Fit Hanger Standard: UDH Tire Clearance: 34c Color: Cobalt Blue |
|---|---|
| Fork | ACX PERFORMANCE UCI APPROVED, TAPER 1-1/8" TO 1-1/2" |
| Shock | - |
| Bottom Bracket | SHIMANO BB-RS500-PB |
| Headset | INTEGRATED (IS) SEALED BEARING FOR OS HEAD TUBE, IS 52/28.6 | IS 52/40 |
| Stem | Polygon Carbon Stem: 90mm (XXXS), 100mm (XXS–XS), 110mm (S–M), 120mm (L–XL), Angle: -7.5° |
| Handlebar | FSA ENERGY COMPACT, W: 400mm (XS, S) / 420mm (M, L) / 440mm (XL), BB: 31.8mm, R/D: 123.2mm, B/R |
| Saddle | ENTITY FLUX2, CR-MO ø 7mm |
| Seatpost | CARBON, AERO 35 x 337mm (XS) / 357mm (S, M, L, XL) Type: Rigid |
| Pedals | - |
| Grips | Bar Tape (Black), Performance Road Wrap |
| Rear Derailleur | SHIMANO 105 RD-R7000-SS DIRECT ATTACH |
|---|---|
| Front Derailleur | Shimano 105 Di2 FD-R7150, Braze-On, Down-Pull |
| Crank | SHIMANO 52/36T, CRANK ARM: 170mm (XXS, XS,S,M) / 172.5mm (L,XL) |
| Shifters | SHIMANO 105 ST-R7020, 2x11-SPEED DCL |
| Cassette | SHIMANO 105 CS-R7000-11 11-30T |
| Chain | SHIMANO CN-HG601-11 |
| Chain Guide | Shimano 105 BR-R7170 Hydraulic Disc, Flat Mount |
| Brakes | SHIMANO 105 BR-R7070 FLAT Type: Shimano 105 Hydraulic Disc |
| Brake Levers | SHIMANO 105 ST-R7020 |
| Rims | CARBON 622-19 24H FOR TYRE 622-28/62 DISC TUBELESS READY |
|---|---|
| Spokes | R: STAINLESS STRAIGHT PULL BUTTED NDS:279mm DS:277mm |
| Front Hub | ALLOY THRU AXLE 12x100mm 24H SEALED BEARINGS CENTER LOCK |
| Rear Hub | ALLOY THRU AXLE 12x142mm 24H SEALED BEARINGS CENTER LOCK |
| Tires | SCHWALBE ONE ADDIX 700x28C |
| Disc Rotors | SHIMANO SM-RT70 F:160mm / R:140mm CENTER LOCK |
First added December 24
Last updated June 1