Choosing a training app for a 100km triathlon.

What is the T100 race format?

The official T100 format is a 2km swim, 80km bike, and 18km run, totaling 100km. The organizer’s guide to training for T100 triathlons is the appropriate source for its current format and event-specific information.

That distance profile sits between familiar categories but should be treated as its own target. The bike is a large share of the day, while the swim and run do not match either an Olympic or half-distance race. A generic plan may still contain useful workouts, but that does not make it a dedicated T100 training plan.

Compare adjacent demands in the half-distance training app guide and the Olympic triathlon training guide.

How should you compare 100km training apps?

1. Verify the target: confirm the product explicitly models a 2km swim, 80km bike, and 18km run rather than assuming a nearby race category is equivalent.
2. Check the weekly structure: look for swim, bike, run, strength, and rest organized around realistic availability and experience.
3. Inspect brick and open-water work: confirm that race-relevant preparation is visible and explained, not hidden behind a generic calendar.
4. Connect fuel and recovery: check whether the app keeps fueling practice and recovery context alongside completed training.
5. Review changes: prefer explainable proposed adjustments that remain under your control when a session or week changes.

A training app should also keep planned work separate from completed evidence and leave unavailable metrics unknown. The broader triathlon training app guide explains these comparison principles.

What does 140.6 support today?

140.6 does not currently offer a dedicated 2km swim, 80km bike, and 18km run T100 target. Its public app distance choices are Sprint, Olympic, 70.3, and 140.6. This page exists to answer the comparison question honestly, not to imply a capability that has not shipped.

140.6’s product approach is to organize training, fueling, recovery, and completed evidence together, with explainable plan changes reviewed before acceptance. Those workflow principles may help you evaluate any product, but they do not turn a supported half-distance target into dedicated 100km support.

Read how the current 140.6 planning workflow works, browse the training guide library, or check the current product and platform information.

Common mistakes when choosing a T100 training app

• Confusing an athlete tracker or event-results app with a structured training planner.
• Assuming a 70.3 plan automatically matches the 2km, 80km, and 18km format.
• Choosing by brand wording without verifying distance support, weekly structure, and current product facts.
• Treating a proposed schedule, projection, or fitness estimate as a guaranteed race outcome.
• Ignoring official event rules, course information, cutoffs, and organizer updates.

For practical preparation topics, see the brick workout guide, fueling app guide, and training with a full-time job.

100km and T100 training app FAQs

What distances make up a T100 triathlon?

The official T100 race format is a 2km swim, 80km bike, and 18km run, totaling 100km. Confirm current event rules, course details, cutoffs, and athlete information with the organizer because those details are outside a training app and may change.

Can I use a 70.3 plan for a 100km race?

Do not assume the formats are interchangeable. Their swim, bike, and run distances differ, so workout balance, progression, fueling practice, and taper context may differ too. Verify that a plan explicitly supports the 2km swim, 80km bike, and 18km run target before relying on it.

Does 140.6 currently have a dedicated T100 target?

No. 140.6 does not currently offer a dedicated 2km swim, 80km bike, and 18km run T100 target. Its public app distance choices are Sprint, Olympic, 70.3, and 140.6. This page is an informational comparison guide, not a claim of dedicated T100 support.

Is 140.6 affiliated with T100 or the PTO?

No. 140.6 is not affiliated with or endorsed by the Professional Triathletes Organisation or T100. Refer to official organizer sources for event facts, branding, registration, rules, and athlete-tracking information.