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 official source for current format and event details.

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: make sure the app supports the 2km swim, 80km bike, and 18km run instead of adapting a nearby distance.
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: make sure workout purposes are clear, not hidden behind a generic calendar.
4. Connect fuel and recovery: check whether the app tracks fueling and recovery alongside your workouts.
5. Review changes: choose apps that explain schedule adjustments and let you approve 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 organizes training, fueling, recovery, and logged workouts together, with adjustments you review before accepting. These principles apply to any training app, but our half-distance plans are not a substitute for dedicated 100km training.

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 based on marketing claims without checking distance support and features.
• 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 format is a 2km swim, 80km bike, and 18km run (100km total). Always check the organizer's website for current rules, course details, and cutoffs.

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 T100 (2km swim, 80km bike, 18km run) plan. Supported distances are Sprint, Olympic, 70.3, and 140.6.

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.