Puerto de Imabari

Puerto de Imabari cycling climb profile

Puerto de Imabari is a compact category 4 climb in Japan, but the numbers make it clear that it should not be treated as a free ramp. The climb is 1 km long, averages 7.49%, and gains 78 m from a start elevation of 0 m to a summit elevation of 78 m.

That combination points to a short, punchy effort rather than a long pacing problem. The challenge is not managing fatigue over many kilometres. It is avoiding the common mistake on a climb this size: starting as if it is only a rise in the road, then discovering that an average gradient of 7.49% is enough to force a real cost if the effort drifts above threshold too early.

How the gradient unfolds

The available profile data gives the climb as a 1 km ascent with a 7.49% average gradient. There is no usable max-gradient figure in the context, so the most responsible way to read Puerto de Imabari is as a climb defined by its average rather than by a known steepest pitch.

In practical terms, that means pacing should be built around a steady one-kilometre climb. Because the net elevation gain is 78 m, the road is doing meaningful work from bottom to top. Even if the gradient feels manageable at the start, the climb is short enough that riders will be tempted to over-commit, but long enough that a poor opening effort can still be punished before the summit.

Pacing and gearing

For a trained rider, this is the kind of climb that sits close to a sustained hard effort rather than a pure sprint. If riding by power, anchor the effort around your known /glossary/ftp and only lift the pace once the summit is genuinely close. If you are unsure of that benchmark, use an estimate from /tools/ftp-estimator before treating this as a maximal effort.

Gearing should leave room to keep cadence under control at 7.49%. The key is not just having a low enough gear, but selecting it early enough that you are not forced into a torque-heavy grind midway up the kilometre. On a climb this short, every acceleration has a cost, and every hesitation breaks rhythm.

The best ride here is disciplined: settle quickly, hold a gear that lets you stay smooth, and use the final part of the climb only after the average gradient has already been paid for.