2XU Light Speed React Test Results
Light Speed React Trisuit · Development Story
Two Wind
Tunnels.
5 Prototypes.
23 Watts SAVED.
March 2023. A blank sheet and a single question: how much faster can we make the world's best trisuit? Two years, two wind tunnel facilities, five prototypes, and athletes like Steve McKenna pushing every iteration - this is the answer. 23 watts saved over other premium brands. At this price point, nothing comes close.
Section 01 — Development Timeline
20 Months.
One Suit.
From the first fabric samples to the race-ready production suit. A full development cycle run alongside the world's best long-course athletes.
2023
R&D Commences
Fabric sourcing and selection begins across upper and lower body. The brief: find fabrics that simultaneously improve aerodynamics, moisture management, and muscle support - without compromise between the three.
Fabric R&D2023
Elite Athlete Testing
Initial prototypes go to elite long-course athletes. Panelling, leg length, arm length, and the underarm gusset all refined through real-world fit and performance feedback across training and racing.
Prototype 1–22024
Wind Tunnel — Silverstone, UK
First wind tunnel session at the Silverstone circuit facility. Data drives key structural changes - including repositioning the centre back nutrition pocket to strengthen aerodynamic flow across the back.
Wind Tunnel 12024
Wind Tunnel — SASI, Australia
Final validation at the Australian Centre for Sports Aerodynamics (SASI), Adelaide. All five prototype iterations tested head-to-head at 40km/h and 50km/h. The production suit records a 7-watt saving over the 2024 baseline and outperforming comparable premium brands by 23 watts.
Wind Tunnel 2 — Final Data2024
Official Release
The Light Speed React Trisuit launches - already proven across multiple elite victories during the development period, including T100 World Tour wins and Ironman titles across four continents.
Race ReadySection 02 - Wind Tunnel Results
The Numbers
Don't Lie.
Five iterations. One production suit. Tested at one of Australia's premier sports aerodynamics facilities.
comparable premium brands at 50km/h*
| Version | Change | Power @ 40km/h | Power @ 50km/h | Saving vs 2024 | vs Comparable Brands* |
|---|---|---|---|---|---|
|
2024 Light Speed
Baseline
|
— | 180.0 W | 345.2 W | — | — |
|
2025 LSR V1
Prototype
|
Refined fit & fabrics | 177.8 W | 340.6 W | 2 W | — |
|
2025 LSR V2
Prototype
|
Refined fit & fabrics | 176.8 W | 337.3 W | 3 W | — |
|
2025 LSR V3
Prototype
|
Refined fit & fabrics | 174.4 W | 328.9 W | 5 W | — |
|
2025 Light Speed React
Production Suit — Final
|
Production release | 172.9 W | 327.7 W | 7 W | −23 W faster |
Section 03 - The Science
Three Problems.
Three Solutions.
Aerodynamics on the bike. Muscle fatigue on the run. Core temperature throughout. The Light Speed React was engineered to address all three.
Aero Fabric
premium brands at 50km/h*
Technology
Compression
Section 04 - Proven in Racing
Elite Results.
Development Period.
Results recorded by 2XU athletes while the suit was still being refined - before it was available to anyone else.
Light Speed React Trisuit
Human Performance.
Multiplied.
Two wind tunnels. 23 watts saved over comparable premium brands. PWX compression. Active cooling. This is the fastest trisuit 2XU has ever built.