Guide
Triathlon and Duathlon Timing: Ankle Chips, T1 and T2 Transition Zones, and Split Times
· 6 min read
In short
- In multisport events, the chip is attached to the competitor’s ankle with a strap and remains there throughout the event.
- Readers at the entrance and exit of the transition zone record split times, showing how long the transition from swimming to cycling or cycling to running took.
- Touchpads are used in standalone pool swimming races; in open water and triathlons, the time is usually recorded by a chip as the competitor exits the water.
- Triathlons often use wave starts and impose time limits for individual legs.
Triathlons and duathlons are multisport events in which the overall time consists of several parts. The timing system must handle more than one passage across a timing point.
Ankle Timing Chip
In multisport events, the chip is attached to the competitor’s ankle with a strap and remains there throughout the event. It is not changed between swimming, cycling and running, so every passage is recorded. How an RFID Chip Works in Running Events explains how the chip works and why its placement matters.
T1 and T2 Transition Zones
The T1 transition zone lies between swimming and cycling, while T2 lies between cycling and running. Readers at the entrance and exit of these zones record split times, showing how long the transition from swimming to cycling or cycling to running took. Time spent in the transition zones usually counts toward the overall time, which is one of the rules that must be stated in the event details.
Swimming: Pool and Open Water
Touchpads are used in standalone pool swimming races. The story of these devices is covered in Swimming: Touchpads and Thousandths of a Second. In triathlons, whether held in open water or a pool, the time is usually recorded by a chip as the competitor exits the water.
Wave Starts and Time Limits
Triathlons often use wave starts for safety in the water. Each competitor’s time is calculated from the start of their wave, as explained in Types of Race Starts. Long events also impose time limits for individual legs; learn more in Time Limits at Endurance Events.
Cycling in Multisport Events
The same principles that apply to cycling events also apply to the cycling leg, particularly those involving metal and speed. Learn more in Race Timing for Cycling and MTB Events.
Multisport Timing in TAQIO
TAQIO can time multiple checkpoints, including transition zones, and publish split times online. For events using RFID ankle chips, readers should be positioned at the transition zones and finish line.
Frequently asked questions
Where is the timing chip worn in a triathlon?
It is worn on a strap around the ankle. It remains with the competitor throughout the event, recording every timing point they cross, including those in the transition zones.
What are T1 and T2?
They are transition zones: T1 is between swimming and cycling, while T2 is between cycling and running. Time spent in them usually counts toward the overall time and can be calculated as a split from the entrance and exit records.
How is the swimming leg timed in a triathlon?
A chip records the competitor as they exit the water or enter the transition zone. Touchpads are used in standalone pool swimming races.
What time limits are used in triathlons?
For long events such as Ironman, commonly stated limits are 2:20 for the swim, 10:30 from the start for the bike leg and 17 hours for the entire event. The event manual specifies the exact limits.