Saving watts and seconds
Seconds gained over a 40K TT-race.
Ryder Hesjedal won the 2012 Giro d’Italia after 91 hours,
performance. Being able to affect 80% of your aero-
39 minutes and 2 seconds of riding. The difference to
dynamic efficiency is a challenge we have taken very
second place Joaquim Rodriguez was 16 seconds, which
seriously and it has required us to find new ways and
if averaged across the 3 476 kilometers of the race,
solutions to improve performance.
represents 0.005 seconds per kilometer. And across the
Together with the aerodynamic specialists in WATTS
21 stages it means an average winning margin of 0.76
Lab we have studied the specific performance needs in
seconds per stage.
road cycling and importantly not only what to focus on,
In road cycling the margins of victory are small and every second is valuable. For Raceday we were curious
Aero TT helmet - 67 sec TT suit - 134 sec Wind tunnel positioning - 56 sec
but also where to focus. On the following page are some interesting numbers we would like to share.
to see what we could achieve in terms of aerodynamic
Aerobars - 122 sec
The Raceday products have been divided into THREE LEVELS, depending of aerodynamic performance. Aero frame - 17 sec Shoe covers - 30 sec Front tri spoke - 42 sec Rear disk - 42 sec
• LEVEL 1
• • LEVEL 2
Equipment
From
To
Drag Difference (G)
Time saved in 40Km TT (sec)
Approx. cost
Cost per second saved $1.86
Skin suit
Regular jersey/knicks
Skin suit
-289
134
$250+
• • • LEVEL 3
Aerobars
Upright with no aerobars
Tuck with aerobars
-262
122
$200+
$1.64
Regular road helmet
Aero TT helmet
-144
67
$200+
$2.98
The product has been developed for minimal drag and maximum speed, without any compromises.
The product has been developed for low drag and maximum performance.
The product has been developed with aerodynamics in mind, but it was not the primary focus during the development process.
Aero helmet Body position with windtunnel
Tuck with aerobars
Tuned tuck
-121
56
> $3.000
$26.79
The product has gone through extensive wind tunnel testing, CFD analysis and is developed in close collaboration with the team in WATTS Lab.
The product has been wind tunnel tested and is developed in collaboration with the team in WATTS Lab.
The product is approved by the team in WATTS Lab and utilizes fabrics, construction or designs with proven aerodynamic advantages.
Front wheel (10 deg yaw)
3-5 spoke
Deep rim 12 spoke
-90
42
$700+
16.67
Shoe covers
No shoe covers
With shoe covers
-65
30
$50
$1.67
Any full disc
3 spoke
-63
29
$1.000+
$30.48
Products are: Tempor Octal Aero Cerebel Aero TT Suit WO Sleeveless Suit
Products are: Octal Jerseys Arm/leg warmers Eyewear Shoe covers Gloves
Rear wheels (0deg yaw) Front wheels (0 deg yaw)
24 spoke boxsection rim
5 spoke
-50
23
$700
$30.43
Aero frame
Standard tubing TT frame
Aero tubing TT frame
-36
17
$3000+
$176.47
Products are: Socks Bottles
Source: Wade Wallace www.cyclingtips.com.au
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