Heat affects your bike in two ways: your body, which loses water much faster, and the mechanics, which don't react the same in the sun. A few adjustments are enough to get through summer without flats or failing components.
Hydration: Anticipate, Don't Catch Up
On a summer ride, you can lose more than 1 liter of sweat per hour. Waiting until you're thirsty means you've already lost alertness and power.
- Drink regularly, in small sips, from the start — not just at breaks.
- Beyond an hour of effort in the heat, add electrolytes (sodium): water alone doesn't replace what sweat carries away.
- Start early morning or late afternoon to avoid the heat peak of early afternoon.
Tire Pressure: It Rises in the Sun
Like on a motorcycle, pressure increases with temperature. A tire left in direct sun, or pumped up cool then ridden on asphalt at 50 °C (122 °F), sees pressure climb. On a road tire pumped high (6-7 bar / 87-102 psi), the margin before failure is smaller than you'd think.
- Pump to the lower end of the recommended range if you're riding in full heat, especially on gravel where comfort matters.
- Don't leave the bike pumped up in direct sun in a car or against a hot wall: that's where tubes fail.
- A slightly underinflated tire grips better on asphalt softened by heat.
