Colletta di Cumiana

Overview

Colletta di Cumiana sits in the Piedmontese foothills southwest of Turin, a Category 3 climb that earns its rating through inconsistency rather than raw length. At 7.7 km with a 4.39% average gradient and 337 m of net elevation gain, the numbers look manageable on paper. The 16.39% maximum gradient tells a different story.

How the Gradient Unfolds

The climb begins at 289 m elevation, rolling out from the valley floor with moderate early slopes that invite a comfortable tempo. The average of 4.39% across 7.7 km is genuinely moderate — the kind of gradient where a steady threshold effort is sustainable for most trained riders — but that average is compressed by flatter passages that mask the sharper ramps hiding further up.

The total ascent figure of 394 m versus a net gain of 337 m indicates meaningful undulation: the road does not simply rise in a straight line to the 626 m summit. There are sections where gradient eases or briefly tips downward, allowing partial recovery, before the road reasserts itself. The 16.39% maximum gradient represents a short, sharp spike — the kind of ramp that punishes anyone who has been riding too aggressively on the lower slopes.

Key Gradient Zones

• Lower slopes: Gradient close to or below the 4.39% mean — use this to settle into rhythm and resist the urge to push well above threshold.
• Mid-climb undulations: Flatter passages provide brief recovery windows; use them rather than accelerating through them.
• Upper ramps: At least one section reaches 16.39% — shift early, maintain cadence, and avoid grinding a big gear into this pitch.

Pacing Notes

The blend of a moderate average and a steep maximum makes pacing discipline the central challenge. Treat the early kilometres as a controlled build, targeting a power output you can sustain to the top rather than one you can sustain for the first flat stretch. Riders who chase the flatter sections will accumulate fatigue that the upper ramps then expose.

Because total ascent (394 m) exceeds net gain (337 m), you will give back some elevation on the descending passages. Do not let these lull you into a false sense of how much climbing remains — the road always takes back what it gives.

For a practical sense of where your sustainable climbing pace sits, the FTP estimator can help you set a ceiling for the sustained sections.

Gearing Recommendations

For most road setups, a compact chainset (50/34) with an 11-32 cassette covers this climb comfortably. The 16.39% maximum is steep enough that riders on standard gearing (53/39) or with a tighter cassette range may find themselves forced out of the saddle earlier than planned. If you are already carrying fatigue from a longer ride, err toward a lower gear selection — the upper ramps on a tired body are harder than the gradient suggests.

• Compact or sub-compact chainset: Recommended for riders without a strong climbing background or when tackling Colletta mid-ride.
• Standard gearing: Viable for strong climbers, but have a plan for the 16.39% section.
• 1x drivetrains: Ensure your largest cassette cog gives a ratio equivalent to at least 34×28 — ideally lower.

Summary

Colletta di Cumiana is an honest Category 3 climb: not brutal, but not forgiving of careless pacing. The 7.7 km distance and 4.39% average are approachable, but the 16.39% maximum gradient and genuine undulation (57 m more total ascent than net gain) reward restraint and punish impatience. Ride the bottom conservatively, use the flatter passages for recovery rather than acceleration, and have your easiest gear ready before the steepest ramp arrives.