Can you really absorb 90 to 120 g of carbs per hour on the bike?

Yes, but only with glucose + fructose blends and after a progressive gut-training build-up. Without preparation, the risk of GI trouble is high.

Do you need more carbs on the bike than when running?

Tolerance is often better on the bike, allowing higher intakes. But needs depend mostly on duration and intensity, to be tailored to each rider.

How do I train my gut for high intakes?

By gradually raising the amounts on your long rides, with the products you'll use in competition, over several weeks.

Cycling7 min

Cycling nutrition: how many carbs per hour?

On the bike, nutrition is often easier to manage than when running: less impact, a less jostled stomach, and the ability to carry and consume more. As a result, cyclists generally tolerate higher carbs per hour — a major asset on long rides. But it's built up gradually. This guide gives benchmarks to tune your carbs per hour on the bike to duration, intensity and your absorption capacity.

Why the bike tolerates more

On the bike, the lack of impact and a more stable position reduce mechanical stress on the digestive system, which makes eating and absorption easier. You can also easily carry bottles, bars and gels, and eat at a steady rhythm. That's why trained cyclists often aim for higher intakes than runners. This tolerance isn't innate, though: it's trained, session after session, by gradually raising the amounts.

How many carbs per hour on the bike?

The benchmarks depend mostly on duration and intensity. On a 1 to 2 hour ride, 30 to 60 g/h is often enough. Beyond 2 to 3 hours at a sustained intensity, 60 to 90 g/h becomes worthwhile, and cyclists well trained for intake can target 90 to 120 g/h on long events. As soon as you go past 60 g/h, use glucose + fructose products (about a 1:0.8 ratio) to recruit two absorption pathways. Spread the intake steadily rather than in big, spaced-out doses.

Practical checklist

1-2 h: 30-60 g/h; 2-3 h and beyond: 60-90 g/h
Trained cyclists on long events: up to 90-120 g/h
Glucose + fructose above 60 g/h
Steady intake, every 15-20 min
Gradual build-up of amounts in training

Common mistakes

Aiming for 90 g/h in an event without ever training it
Staying on glucose only above 60 g/h
Under-fuelling on long rides and finishing 'empty'
Eating in big, spaced-out doses rather than steadily
Copying someone else's intake without accounting for your own tolerance

FAQ

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