Triathlon Bike Computer Setup Guide

For race day, show these 5 fields and nothing else:

1. Power (3-second avg) — your effort target
2. Heart rate — your stress signal
3. Lap power average — am I on plan?
4. Distance — where am I in the race?
5. Elapsed time — am I on pace?

For training, you can add cadence, gradient, elevation, speed, or interval timer depending on the session. But on race day, less is more — your brain has bigger problems to solve than reading screens.

For pacing math, see pace calculator and the FTP calculator.

On a road bike, the computer mounts on the stem or above the handlebars. On a tri bike, mount it between the aero bars using an out-front mount (Garmin, Wahoo, or third-party like K-Edge). This puts the screen directly under your line of sight when you're in the aero position — no need to break tuck.

Key rules:

• Mount the unit forward, NOT below the bars (you'd need to lift your head)
• Cable-tie the strap underneath for extra security on rough roads
• Add a tether strap as a backup — losing your computer on a rough descent is heartbreaking

For bike setup basics, see bike fit for triathlon beginners and is bike fitting worth it.

Sprint (20 km bike): Single screen — power, HR, elapsed time, distance. You're racing for under 45 minutes; you don't need page-switching mid-race.

Olympic (40 km): Add a second screen with lap power average + lap time, with auto-lap every 5 km. Toggle once or twice per race.

Half-Ironman 70.3 (90 km): Three screens — main (power, HR, distance, time), pacing (lap power, lap time, distance remaining), nutrition reminder (a manual lap button every 20 min triggers a fuel reminder).

Ironman (180 km): Four screens — main, pacing, nutrition timer, and a 'simple' screen with only HR and time for when fatigue makes data feel overwhelming. Auto-lap every 10 km.

For full-distance pacing, see Ironman pacing strategy.

1. Power (3-second avg) — your effort, independent of wind and hills. If you don't have a power meter, use heart rate as the substitute.

2. Heart rate — your physiological stress. Climbing 10 BPM above plan = back off.

3. Lap power average — your real pacing check. A 5-km lap average tells you whether you're holding your target.

4. Distance remaining — mental anchor, especially for long races.

5. Elapsed time — feeds nutrition timing and pacing math.

Don't display: instantaneous power (too jumpy), speed (changes with wind/hills — meaningless), elevation gain (interesting later, useless mid-race), normalized power (only useful for training analysis).

Auto-lap every 5 km (sprint, Olympic) or 10 km (70.3, Ironman). This gives you clean per-lap data so you can see if you're drifting too hard or too soft.

Combine with manual lap button at every aid station for nutrition tracking. A lap button press becomes your reminder to drink + take a gel.

Set alerts for HR ceiling — e.g. 'beep if HR > 165 BPM for 60 sec'. This catches blow-ups before they happen.

Budget ($150–$220): Garmin Edge 130 Plus, Bryton Rider 420. Basic but show all the metrics that matter. Perfect first bike computer.

Mid-range ($250–$350): Wahoo Element Bolt v2, Garmin Edge 530. The sweet spot. Long battery, color screen, perfect data fields, easy app setup. Recommended for 90% of triathletes.

Premium ($450+): Garmin Edge 1040 Solar, Wahoo Element Roam v2. Bigger screen, solar charging, advanced training metrics. Worth it for Ironman athletes who race 6+ hour bikes.

Pair with a power meter for true triathlon racing — see our heart rate chest straps guide and the budget triathlon watches for combos.