Promau

Overview

Promau is a Category 3 climb in Austria, running 9 km from a valley floor at 461 m to a summit at 807 m. On paper it is a modest effort: a net elevation gain of 346 m over the full length, which works out to the 3.85% average gradient that defines its classification. Start low, finish high, and the numbers suggest a steady, manageable haul.

The paper version lies. The total ascent on this climb is 816 m, more than double the 346 m of net gain. That gap of 470 m is descent stitched into the climb: every metre you drop between the base and the summit is a metre you have to reclaim. Undulation on this scale means the effort is far harsher than the category or average gradient implies, because you never settle into one long, even grind.

How the Gradient Unfolds

A 3.85% average is a statistical smoothing of a very lumpy profile. With 470 m of hidden descent, the climb rolls: sharp pitches, then false flats or genuine downhills, then another wall. The steepest section touches 17.5%, roughly four and a half times the average, so the hard efforts are concentrated in short, punchy ramps rather than spread evenly.

• Recovery sections and short descents where the road gives back elevation
• Repeated short climbs that reset your legs each time you crest one
• A steepest ramp at 17.5% that demands a real surge

Pacing Notes

On a smooth, even climb you can hold steady watts and let speed drift. Promau's undulation breaks that model. Chasing an even speed here forces you to spike power on every one of those 17.5% ramps and coast on the descents, which shreds your legs. Instead, anchor your effort to a target sustainable power output and let speed fluctuate wildly. Ease slightly on the steep pitches rather than fighting to hold pace, and recover actively on the descents. If you do not know your ceiling, run the FTP estimator before you ride so your target is grounded in real numbers.

Gearing

Gearing is governed by the steepest gradient, not the average, and 17.5% is steep enough to stall a road-standard setup. Fit a compact (50/34) or sub-compact chainset paired with a wide-range cassette such as 34×32 or 34×34 so you have a bailout gear for the walls. The 470 m of repeated climbing also means you will hit those low gears many times, so spinning rather than grinding will preserve your legs. Check your chainset and cassette before the ride.

Summary

• Length: 9 km
• Average gradient: 3.85%
• Maximum gradient: 17.5%
• Net elevation gain: 346 m
• Total ascent: 816 m
• Category: 3

Promau rewards riders who read the total-ascent figure, not just the average. Treat it as a rolling, undulating effort with sharp ramps rather than a steady Cat 3 drag, gear low, pace to power, and the 816 m of climbing becomes something you can manage rather than something that breaks you.