Austin Tri-Cyclist Blog

Tuesday, June 10, 2014

2014 Texas State Time Trial Champion
Gear and Tech Specs

by Jack Mott

Being former or current multi-sport athletes in many cases, the ATC Racing women pride themselves on their time trialing prowess and put up impressive results at this year's Texas State Time Trial Championship. Katie Kantzes nailed a third place in the Eddy Merckx category, Marla Briley got second in category 3, and Kat Hunter took first place in Cat 1/2. (You can read Kat's race report on

On Sunday, the team of Missy Ruthven (ATC owner), Maggi Finley, Marla Briley, and Kat Hunter backed up those impressive results with a 56:37, fastest women's time, in the team time trial.

To give you an idea of the attention to detail that goes into a winning time trial, we will break down all the gear, aero data, and power data of Kat Hunter's winning ride.

Bike Build Specs
  • Frame - Cervelo P2C classic with modified top tube cable routing 
  • Wheels - HED Jet 6 front, HED Jet 9 with wheelbuilder disc cover and G3 Powertap hub
  • Tires - Continental Attack Clinchers, 22mm @ 105psi with Vittoria latex tubes
  • Aerobars - UCI Legal HED Corsair with integrated brake levers and Vision clipons
  • Stem - TriRig Sigma aero stem
  • Fork - Cervelo FK26
  • Brakes - TriRig Omega aero brake
  • Saddle - Adamo
  • Head Unit - Powertap Joule
  • Hydration - One between the arms rocket science bottle in a XLAB Gorilla cage
  • Skewers - View-Speed aero bolt on skewers
  • Helmet - Giro Selector
  • Cranks - FSA Gossamer with FSA 54T aero chainring
  • Pedals - Look Keo Blade aero pedal
  • Gruppo - Shimano Ultegra
  • Cassette - Shimano Dura Ace 12-25
  • Derailleur Pulleys - Hawk Racing
  • Bottom Bracket - Hawk Racing
  • Chain Lube - Rock n' Roll Extreme
  • Bar Tape - Tennis grip from Target. I dunno. It was thin.
Power Meter Data
  • Goal Power -  250 watts
  • Actual Average Power - 247 watts
  • Variability Index - 1.0
  • First Half Power (Headwind) - 254 watts
  • Second Half Power (Tailwind) - 241watts
  • Avg Temp - 82 deg G
  • Avg Cadence - 92
  • Avg Speed - 26.6 mph
  • Distance - 40k
  • Time - 56:23

Power File

WKO+ Power File from the TT

Aero Data

Approximate yaw angle distribution from

Using BestBikeSplit, an excellent online aerodynamic and pacing tool, we can approximate that Kat had a CdA of approximately .20 at 0 yaw, and .19 at yaw. We can also see that about 70% of the race was between 0 and 5 degrees of yaw, with most of the rest of the race between 10 and 15 degrees of yaw.  Knowing what the angle of attack of the wind is during a race can help you make intelligent equipment choices. For instance, we can see from this data that a deeper front wheel would have been faster, as around 30% of the race had yaw angles where a Jet 9 is a bit faster than a Jet 6.  Since about 70% of the race was at very low yaw angles,  choosing a narrower tire was definitely a good call. Narrow tends to be aero, at low yaw.

Close-up Bike Shots 

The venerable P2 Classic remains competitive

View Speed Skewers, Cervelo FK26 fork, and HED Jet 6 with Continental Attacks

HED Jet 9 with a disc cover taped on,  nice clean chain

TriRig brake, stem, and HED aerobars make for a clean front end


  1. Nice riding on both Saturday and Sunday, Kat! I enjoy reading about the attention to details different athletes put into making great performances happen and always learn a few new tricks!

  2. where are the shoe covers?

    1. Conflicting data on which covers help, and if they help on which shoe, and by how much. So they have been a low priority. Instead I would love to do something like:

  3. These pictures are so badass especially the one of you