The Bike Leg in Aracaju: 90 Flat Kilometers Over Three Laps — Whoever Stays Locked in Aero Wins

The course in a nutshell

90 km over three laps. The official page describes a flat, fast course with roughly 845 m of claimed elevation gain. Another course data source lists just 377 m, with a max gradient of 5.2%. The numbers diverge and let's be clear: there's no definitive figure. But the bottom line doesn't change. In both scenarios we're talking about a course to treat as flat, with no real climbs, where time is made with steady power and an aerodynamic position.

What to do with this information: don't build your prep around the exact elevation gain. Build it around the ability to hold aero position for 2.5 hours or more without ever sitting up.

The real challenge: no excuse to change position

On a hilly course you get out of the saddle, shift your contact points, give your back and perineum a break. Not here. No climbs means no natural breaks. If you're not comfortable in aero for 90 km straight, you'll lose more time than the fast course gives you.

Test to do before race day: two or three long rides (70-90 km) entirely in race position, with your final setup. If after 60 km you feel your neck, traps or saddle, work on your bike fit now, not in race week.

Pacing: steady, not euphoric

Three laps tempt you to go out hard: smooth roads, high speed, adrenaline. Classic mistake. Several race reports from past editions note that the heat and, on some days, the wind made the race harder than the elevation profile suggests. A 2025 report describes a race defined by extreme heat and wind, with mental management as the deciding factor.

Practical guidelines:

• Set a target power that's conservative compared to a cool-weather race: humid heat drives heart rate up at the same wattage.
• First lap: under control, learn the course. Second lap: race pace. Third lap: hold, don't surge.
• If you don't use a power meter, use heart rate with a ceiling set in advance, not feel: at 30°C and high humidity, feel lies.

The three-lap traffic

Three laps over 90 km means the course fills up in the middle stages of the race: fast athletes lapping others, athletes on their first lap, packs forming unintentionally. Two consequences:

1. Drafting: maintain legal distances even when traffic bunches up. Officials are busiest in the crowded sections. 2. Care when passing: call your passes, hold your line, don't make sudden changes of direction when you're being lapped.

The exact number of laps and the course map should still be verified in the official athlete guide before the race.

Hydration on the bike: the bike is your fuel tank

With air temps up to 30°C and high humidity, the bike leg is the best time to drink and take in electrolytes: absorption is better on the bike than on the run. Plan a fluid and sodium intake above your temperate-climate standard and test it in training during the hot hours of the day. Arriving at T2 already dehydrated means compromising the half marathon, which is where the heat comes to collect here.

Decision checklist

• Setup: built for a flat, fast course. Mid-to-deep section wheels if you handle them well; wind data is neutral due to lack of information, so leave yourself a margin.
• Gearing: no need for climbing gears; prioritize smoothness at the cadence you hold in aero.
• Power plan: set in advance, with a ceiling for the first lap.
• Fluid plan: how many bottles, where you'll refill at aid stations, how much sodium per hour. Written down and tested.

Do this homework and the Aracaju course is one where a well-prepared age-grouper can set a PB over 90 km. Skip it, and the heat will notice before you do.