Our speed tests have shown the TT bike to be faster than any other bike on Zwift. But the TT bike isn’t the lightest bike, only the most aero. Because of this, we suspected that up a long enough climb some of the lighter bikes would be faster than the TT. And that is in fact the case!

Here are the results (we are running additional test laps–this page will be updated as additional laps are completed).

Epic KOM Forward (Strava segment)

TT with Zipp 808’s @ 450 watts: 17:37
Cervelo S5 with 808’s @ 450 watts: 17:40
Cervelo S5 with Zipp 808’s @ 300 watts: 23:34
Trek Emonda with Zipp 808’s @ 300 watts: 23:38
TT with Zipp 808’s @ 300 watts: 23:39
Trek Madone with Zipp 808’s @ 300 watts: 23:39
Canyon Aeroad with Zipp 808’s @ 300 watts: 23:41
Trek Emonda with Zipp 202’s @ 300 watts: 23:44
TT with Zipp 202’s @ 300 watts: 23:44
Zwift Aero with Zipp 808’s @ 300 watts: 23:45
Cervelo with Zipp 808’s @ 150 watts: 41:41
TT with Zipp 808’s @ 150 watts: 42:18

Climb to Tower (Strava Segment)

Cervelo S5 with 808’s @ 450 watts: 4:33
TT with Zipp 808’s @ 450 watts: 4:38
Cervelo S5 with Zipp 808’s @ 300 watts: 6:37
Trek Emonda with Zipp 808’s @ 300 watts: 6:38
Trek Emonda with Zipp 202’s @ 300 watts: 6:38
Trek Madone with Zipp 808’s @ 300 watts: 6:39
Canyon Aeroad with Zipp 808’s @ 300 watts: 6:40
Zwift Aero with Zipp 808’s @ 300 watts: 6:42
TT with Zipp 202’s @ 300 watts: 6:44
TT with Zipp 808’s @ 300 watts: 6:45
Cervelo with Zipp 808’s @ 150 watts: 12:51
TT with Zipp 808’s @ 150 watts: 13:09

Observations:

  • More watts=more speed=more impact from aerodynamics. The TT is bike slower than the Cervelo S5 at 300 watts, but faster at 450 watts. This is because the impact of aerodynamics increases as you go faster.
  • Since the TT bike performs much better when descending, over a full loop course it is still the fastest bike. The TT bike descends the backside of the Epic KOM in 5:10, while the Cervelo S5 does it in 5:30.

Notes:

  • All tests were performed with a 75kg, 183cm (6′) rider at 300 watts unless otherwise noted.