Ibardin

Overview

Ibardin is a Category 3 climb in France running 6.9 km from start to summit, gaining 393 metres of total ascent. It begins at just 33 metres above sea level and tops out at 317 metres — a modest altitude profile, but the climb's sting comes from gradient variation rather than raw elevation.

The average gradient of 4.11% sounds forgiving, and across much of the lower road it is. That number, however, masks a maximum gradient of 16.32%, which means at least one section bites hard enough to force a gear change on anyone who has underestimated the opening kilometres.

How the Gradient Unfolds

With 393 metres of total ascent across 6.9 km, the arithmetic suggests a steady, rolling effort — but the gap between the 4.11% average and the 16.32% peak tells a different story. Expect the road to mix runnable false-flat sections with abrupt ramps.

• Lower section: The low start elevation and moderate early terrain invite riders to push tempo. Resist the urge. Burning matches here is the most common pacing mistake on climbs with this average-to-maximum gradient spread.
• Mid-section ramps: The steeper pitches — approaching or hitting that 16% ceiling — arrive without the dramatic forewarning you get on more famous climbs. Cadence will drop sharply if you are already pushing near threshold.
• Upper section: Once past the hardest ramps, the gradient typically eases back toward the climb's mean. A composed effort here rewards anyone who paced the lower road conservatively.

Pacing Notes

Ibardin's average gradient puts it firmly in the range where many riders default to a tempo or sweet-spot effort. That is appropriate for the flat-to-moderate stretches, but the 16.32% maximum demands that you hold something back.

A practical target: treat the climb as two efforts. Ride the gentler sections at 85–90% of your functional threshold power (estimate yours here), then accept the brief power spike on the steep ramps rather than trying to hold a fixed wattage through them. Grinding a big gear up a 16% pitch to maintain steady power burns far more energy than a short, high-cadence surge followed by a quick recovery.

Gearing Recommendations

For a climb averaging 4.11% you do not need an ultralight climbing cassette — but the 16.32% maximum changes the calculation.

• Road double: A compact chainset (50/34) paired with an 11-28 or 11-32 cassette covers the full gradient range comfortably.
• 1x setups: Ensure your largest sprocket reaches at least 32t. A 34t gives useful headroom on the steepest ramp without sacrificing too much on the flat approach.
• Heavier riders or loaded bikes: Move to a 34t or 36t maximum sprocket. The short length of the steep pitches does not justify the suffering of being under-geared.

Spin-to-win applies on the sharp ramps. Mashing at low cadence on a 16% gradient at fatigue compounds the cardiovascular cost disproportionately.

Summary

Ibardin is not a climb that punishes you with sustained brutality. Its 6.9 km length and 4.11% average make it approachable, and the 393-metre total ascent is well within Cat 3 territory. What catches riders out is the sharp maximum gradient appearing within an otherwise moderate profile. Arrive controlled, gear appropriately, and use the long runnable sections to recover — not to bank time you will spend on the steep pitches.