Cycling is dominated by aerodynamics — across every discipline. Using the Streamlines CIRRUS system we measure your drag in the real world, on roads you actually ride, then iterate kit and position until the numbers say you're fast.
ALTOSTRATUS, FORMA, TEMPO and the NIMBUS data logger mounted to your bike. Power meter required.
Straight, low-traffic course with under 1% gradient — a quiet local road or cycle path near you.
Repeat the course while we swap positions, helmets, suits and wheels. Wind & yaw logged live.
CdA per run on the CIRRUS portal. Written report and a review call to lock in changes.
We test using CIRRUS — the real-world aerodynamic drag measurement system from Streamlines Aero. It measures drag to within 2 watts on everyday roads, not a wind tunnel, so we can iterate your position and kit on the courses you actually race.
About the CIRRUS system →Every change is tested on the road and measured directly — so the numbers in your report are your own, not a rule of thumb.
A video call covering position, kit, contact points and race-day setup. Finding the marginal gains for ultra, Ironman and TT, with no testing needed.
Around three hours on a local course. Baseline your setup, then test the changes most likely to matter.
Two testing blocks with a break between. Position work plus helmets, suits and wheels — race-day setup, locked.