Race day confidence
Keiro builds your race-day execution plan — pacing targets for every segment of swim, bike, and run — tuned to your fitness, your gear, the course profile, and the weather forecast. Built on pacing research, not rules of thumb.
Your race plan for IRONMAN Lanzarote
This is what you take to the start line. Segment-by-segment targets for swim, bike, and run — built from your fitness data, your equipment, and 4+ years of course and weather history.
Your target effort, adjusted for water temp, wetsuit rules, drafting, and turn penalties — so you exit the water on plan, not on adrenaline.
Segment-by-segment power targets across 700 sections — calibrated to your CdA, weight, and equipment. You'll know what to hold on every climb and descent.
Your run pace accounts for what the bike cost you. Keiro quantifies bike-to-run fatigue so the plan protects your marathon — not just your bike split.
How it works
Four inputs. One execution plan.
Set your profile
Weight, FTP, CSS, threshold pace — the numbers that define your current fitness.
Configure equipment
Bike, wheels, helmet — your CdA and rolling resistance, modelled from real data.
Find your race
50+ fully modelled courses with elevation, weather history, and terrain data.
Race with a plan
Your execution plan: projected finish, segment pacing, and What-If scenarios to test trade-offs before race day.
Featured races
50+ races fully modelled
Every race in the database is analysed the same way — elevation, wind exposure, terrain, and years of weather history. Pick a race to explore.
IRONMAN Texas
The Woodlands, United States
140.6IRONMAN 70.3 Valencia
Valencia, Spain
70.3IRONMAN 70.3 Chattanooga
Chattanooga, United States
70.3IRONMAN Hamburg
Hamburg, Germany
140.6IRONMAN 70.3 Nice
Nice, France
70.3London T100 Triathlon
London, United Kingdom
T100Swedeman Xtreme Triathlon
Åre, Sweden
XTRIIRONMAN Kona World Champ.
Kona, United States
140.6Built for triathletes
Pacing research, applied to your race
Most pacing tools give you a number. Keiro gives you an execution plan — grounded in how bike effort affects run performance, how heat compounds fatigue, and how course terrain changes optimal strategy.
- Open water swim modelling
Wetsuit advantage, drafting benefit, water temperature, turn penalties — your swim plan is built from race-specific conditions, not a CSS lookup.
- Equipment physics
CdA, rolling resistance, wheel aerodynamics, bike weight — all modelled from real data. Swap a wheelset or helmet and see the time difference on this course, not a generic aero estimate.
- Run impact modelling
Every watt on the bike costs seconds on the run. Keiro finds the power that delivers your fastest finish — not your fastest bike split.
- Projected vs Optimised
See what your current fitness predicts, then let the optimiser show you where the time is. Test equipment swaps, effort changes, and pacing alternatives before race day.
Your next race deserves a plan
Build your race plan for free. 14 days, no credit card.