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Info
Upload your route.
Calculate your race.
TTer is a web tool for time trials and similar efforts. Upload a GPX or FIT, input your numbers, and TTer will handle the rest. Clicking to calculate will reveal your pacing plan, 3D route visual, race commentary, and intelligent setup recommendations.
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Drop your route file here
Supports .gpx and .fit
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- km
- m gain
- pts
Enter distance & elevation manually instead
Rider
Equipment
Aerodynamics
Bike & Surface
Yaw / CdA Curve Wind tunnel CdA per yaw angle - enable to enter
Conditions
N
S
E
W
°
Critical Power
Enable CP / W prime model
CP / watts
W prime / kJ
Power Curve
Enable power curve targets
5 sec
1 min
5 min
20 min
60 min
90 min
No GPX loaded
280W FTP
Standard TT
20°C · Sea level
Estimated Finish Time
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km/h avg
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watts
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W/kg
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min/km
Pacing Science
Pacing Strategy
Flat courses
Even Power
Constant power minimises total work against drag (drag proportional to v cubed). Ronnestad et al. (2020): fastest flat TT strategy. Hold within 3W of target power throughout.
Hilly / Variable
Negative Split
Start at 98%, build steadily to 104%, then empty the tank at 108% in the final 15%. Preserves W prime early and exploits VO2 kinetics in the finish. Abbiss and Laursen (2008).
Short / under 25 min
Fast Start
130% for the first 30–45 seconds to prime VO2 kinetics, settle to 110% briefly, then hold 102% throughout before a final 105–108% push. Reduces VO2 slow component. Effective for TTs under 25 minutes. de Koning et al. (1999), Bishop (2002).