Wind Tunnel Report

SUMMARY
The results in this report show that the Ventum
One is the fastest of the bicycles tested. Whentested in race trim (with 1.4 liters of hydration),
the Ventum One demonstrated significantly better
aerodynamic performance (24% less drag) thanthe closest competing bicycle tested, the Cervelo
P5. The Ventum One, with its conformal waterbottle, even outperformed the Cervelo P5 withwater bottles and water bottle cages removed.

METHODOLOGY
Ventum conducted preliminary wind tunnel

The following configuration was standardized

testingacrossattheFasterwind tunnelin

thebicycles

testedtoensure

Scottsdale, Arizona and the A2 wind tunnel inconsistency and comparability:

Mooresville, NC in 2014 and 2015. Several

 Gear position: big gear (large front chain‐

prototype Ventum bicycles were tested, asring), smallest gear (rear), with the drive‐

well as production versions of the following

side crank‐arm forward and horizontal andcompeting bicycles: Cervelo P5, Scott Plasma,

taped in position.

and Canyon Speedmax. The bicycles were Wheels

comparatively tested using the same wheels, Zipp 808 Firecrest wheels

saddle, and fit. Tests for the competing Vittoria Corsa CX tires 100PSIbicycles were conducted both with and Vittoria Ultralite tubes

without frame‐mounted water bottles andcages. The preliminary testing found that thefastest of the competing bicycles is theCervelo P5.

 Saddle – ISM Prologue Position
 Saddle height Saddle distance behind bottom bracket

Ventum conducted additional wind tunnel

 Saddle angle

testing of the production Ventum One and theCervelo P5 at the Faster wind tunnel in Distance from saddle to aerobar pad andextension/shifter

Scottsdale, Arizona in 2015 (the results of this Distance from aerobar pad to front hub

testing are presented below).

 Width of aerobar extensions and pads
 Rise of aerobar extensions

The cycling industry does not have a standard
protocol for wind tunnel testing; instead, every
company has their own protocol. Ventum’s
protocol is as follows: Yaw: ‐20° to 20° Sweep in 5° step increments
 Speed: 30mph wind speed, 30mph wheel
rotation speed.

 Sampling Interval:
 20‐secondinterval,

averagedatacollection

 20‐second settling period before datacollection.

 Average of all sweeps for each bicycle
According to the aerodynamic technicians atFaster, “testing was performed with Ventum inthe most standardized way possible. Keeping
wind and wheel speed at 30mph is the mostconsistent 'standard' in tunnel testing within
the cycling industry. Ventum testing wasperformed at 30mph wind and wheel speed.
The sweeps went from ‐20° to positive 20° in 5°
increments. Multiple repeats were completedwith each frame.”

BICYCLES TESTED
Cervelo P5
 Dura Ace Di2 groupset, 25‐11 cassette, 172.5 cranks
 3T Aduro bars and stem
 ISM Prologue saddle
 Zipp 808 Firecrest
 Vittoria Corsa CX tires 100PSI
 Hydration configuration:

 Configuration 1 ‘Naked’: No hydration system present
 Configuration 2 ‘Race Trim’: 700ml bottle on down tube
and 700ml bottle between aerobar extensions.

Ventum prototype (Gen. V, pre-production)
 Dura Ace Di2 groupset, 25‐11 cassette, 172.5 cranks
 Ventum bars and stem
 ISM Prologue saddle
 Zipp 808 Firecrest
 Vittoria Corsa CX tires 100PSI
 Hydration configuration:
 Ventum One 1.4 liter conformal water reservoir

Ventum One (production)
 Dura Ace Di2 groupset, 25‐11 cassette, 172.5 cranks
 Ventum bars and stem
 ISM Prologue saddle
 Zipp 808 Firecrest
 Vittoria Corsa CX tires 100PSI
 Hydration configuration:
 Ventum One 1.4 liter conformal water reservoir

DATACervelo P5 in 'Race Trim' vs 'Naked' Cervelo P5❶ Cervelo P5 w/ 1.4l (2x 700ml bottles)❷ Cervelo P5 w/ No Bottles or Cages
Table Rotation (degrees)
Average Long. Drag (grams)
Bicycle /Hydration‐20‐15‐10‐505101520

Average

❶

662

591

607

601

672

647

644

631

576

625

❷

499

447

476

499

545

531

497

480

429

489

Ventum’s testing found that adding hydration to the Cervelo P5 had a significant
adverse impact on aerodynamic performance.

Ventum One (Production) vs. Ventum (Prototype)❸ Ventum Prototype (Gen. V) w/ 1.4l Integrated Bottle❹ Ventum One w/ 1.4l Integrated Bottle
Table Rotation (degrees)
Average Long. Drag (grams)
Bicycle /Hydration‐20‐15‐10‐505101520Average❸

519

455

533

515

533

534

522

495

472

508

❹

446

407

532

520

497

509

472

465

419

474

The Ventum One is 7% faster than the Ventum Gen. V prototype due toenhancements to the frame and the introduction of the Ventum fork.

Ventum One (Production) vs. Ventum (Prototype)vs. Cervelo P5 in 'Race Trim' vs 'Naked' Cervelo P5❶ Cervelo P5 w/ 1.4l (2x 700ml bottles) | ❷ Cervelo P5 w/ No Bottles or Cages❸ Ventum Prototype (Gen. V) w/ 1.4l Integrated Bottle | ❹ Ventum One w/ 1.4l Integrated Bottle
Table Rotation (degrees)
Average Long. Drag (grams)
Bicycle /Hydration‐20‐15‐10‐50

5

10

1520

Average

❶

662

591

607

601

672

647

644

631

576

625

❷

499

447

476

499

545

531

497

480

429

489

❸

519

455

533

515

533

534

522

495

472

508

❹

446

407

532

520

497

509

472

465

419

474

The results show that the Ventum One is the fastest of the bicycles tested.
When tested in race trim (with 1.4 liters of hydration), the Ventum One
demonstrated significantly better aerodynamic performance (24% less drag) thanthe closest competing bicycle tested, the Cervelo P5. The Ventum One, with its
conformal water bottle, even outperformed the Cervelo P5 with water bottles
and water bottle cages removed.