Selletta Carteri

Overview

Selletta Carteri is a hors catégorie climb, and the numbers explain the label without any embellishment. It runs for 16 km at an average gradient of 8.86%, lifting you from a start elevation of 612 m to a summit of 2030 m. That is 1418 m of net elevation gain, with 1404 m of total ascent — a figure so close to the net gain that the road barely relents from bottom to top. There are no free kilometres here. An 8.86% average over 16 km is relentless, and the 30.22% max gradient promises at least one ramp that will have you out of the saddle and grinding.

How the Gradient Unfolds

The shape of Selletta Carteri is defined by consistency. With total ascent (1404 m) sitting only 14 m below net gain (1418 m), the climb is almost entirely uphill — there are effectively no descents or flat recovery stretches to reset your legs. That is what makes an 8.86% average so punishing: it is not inflated by a handful of brutal walls balanced against easy terrain. Most of the 16 km sits in the same demanding band.

The exception is the 30.22% max gradient. A pitch that steep is more than three times the average, so it is a spike rather than a sustained wall. Expect the climb to hold you honest around 8 to 9% for long stretches, then rear up to that maximum where the road briefly turns vicious. Reading the profile, treat everything as "hard" and the max ramp as the moment to have already shifted down.

Pacing Notes

Discipline wins on a climb like this. Sixteen kilometres at 8.86% is a sustained effort that will punish anyone who goes out hot, so anchor your pacing to your FTP rather than to feel in the first kilometre. On an HC climb of this length, most riders will spend the bulk of the ascent near threshold, with the 30.22% max forcing a short surge above it — recover immediately afterward rather than trying to hold that intensity.

If you do not know your threshold number, estimate it first with the FTP estimator, then set a target power you can hold for the full 16 km. The mental model is simple: pick a wattage that feels almost too easy at the base, because you will be climbing for a long time and 1418 m of gain is a lot of altitude to defend a pace against.

Gearing

Gear for the average, then gear again for the max. With an 8.86% average sustained across 16 km, you want a cassette that lets you spin rather than mash. A compact 34-tooth chainring paired with a 34×32 setup is the sensible baseline for most riders tackling an HC climb of this profile.

But the 30.22% max gradient changes the calculation. On a ramp that steep, a 34×32 can leave you over-geared and stalling, so lean toward a 34×34 for extra margin. The 2 m of relief between total ascent and net gain tells you there is nowhere to recover, so err on the easier side — the low gear you rarely use is the one that saves your climb.

Summary

Selletta Carteri is a genuine HC test: long, steep, and unbroken from base to summit. Respect the 8.86% average, gear low for the 30.22% max, and pace off your threshold to reach 2030 m with something left.

Length: 16 km
Average gradient: 8.86%
Max gradient: 30.22%
Start: 612 m
Summit: 2030 m
Net gain: 1418 m
Total ascent: 1404 m
Category: HC