Passo degli Italiani

Overview

Passo degli Italiani is a hors catégorie ascent that leaves no doubt about its intentions. Over 17.2 km the road climbs from 795 m to a summit at 2343 m, a net gain of 1548 m at an average gradient of 8.99%. That average alone would earn respect on any climb, but the defining number here is the max gradient of 32.67% — a wall steep enough to force riders out of the saddle or off the bike entirely. With a total ascent of 1485 m recorded over its length, this is a sustained, high-altitude effort that rewards patience far more than aggression.

How the Gradient Unfolds

An 8.99% average across 17.2 km means there is almost nowhere to hide. Unlike climbs that stack their difficulty into a single crux, a mean gradient this close to 9% over such a distance implies relentless, grinding pressure from bottom to top. The presence of a 32.67% max tells you the road is not perfectly uniform: expect ramps that spike violently above the average, likely on tight switchbacks or short connector pitches, separated by sections that only feel gentle by comparison. The gap between the net gain of 1548 m and the total ascent of 1485 m is small, confirming there is little respite — almost every metre gained is metre climbed, with negligible descending to recover on.

Pacing Notes

On a climb this long and steep, discipline is everything. Anchor your effort to your FTP and resist the urge to chase the early gradient. A 17.2 km effort at 8.99% will likely sit well beyond the point where you can bank time — going into the red on the lower slopes leaves nothing for the ramps that spike toward 32.67%. Treat those pitches as unavoidable surges rather than efforts to attack, then settle back to your sustainable ceiling. If you are unsure where that ceiling sits, run the numbers through the FTP estimator before your attempt so your target wattage matches the summit at 2343 m, not just the opening kilometres.

Gearing

Do not under-gear this one. For an HC climb averaging 8.99% with a max of 32.67%, most riders will want the lowest ratios they can reasonably fit. A compact 34-tooth chainring paired with a 34×32 cassette is a sensible baseline, but on the steepest ramps 34×32 can still feel punishing when fatigue sets in near the top. If your rear derailleur can accommodate it, stepping up to 34×34 buys you meaningful margin, letting you spin rather than grind through the worst pitches. Given the 1548 m of net climbing, the extra cog pays for itself over the full 17.2 km.

Summary

Passo degli Italiani is a genuine test: long, steep, and unforgiving from 795 m to 2343 m. Come prepared with low gearing, a paced effort, and respect for a max gradient that few climbs can match.

Length: 17.2 km
Average gradient: 8.99%
Max gradient: 32.67%
Start: 795 m
Summit: 2343 m
Net gain: 1548 m
Total ascent: 1485 m
Category: HC