Oude Kruisberg: Cycling Climb

The climb · Belgium

About Oude Kruisberg

Collections

Hellingen

The Oude Kruisberg climbs out of Ronse on the older road, taking an urban beginning into a more demanding cobbled upper section. This is the short ascent itself, rather than the longer continuation towards the Hotond. Its setting makes a change from the exposed farm lanes of the surrounding hills: the climb starts among the streets of the town and builds its character as it gains height. The transition onto the stones is the important dividing point.

Across roughly 860 metres, the selected road gains enough height to make that change of surface more than a decorative feature. The earlier slope allows a rhythm to form, then the steeper paving asks the rider to maintain it under different conditions. The upper section feels more substantial than the distance alone suggests, because vibration and climbing arrive together. Once the short ascent is completed, the wider ridge roads remain a separate proposition. Oude Kruisberg makes a compact and distinctive departure from Ronse.

01 / The ascent

Elevation profile

Start 48 m · Summit 100 m

Gradient by distance0.86 km / 53 m gain

0 km0.2 km0.3 km0.5 km0.7 km0.9 km

02 / The numbers

Climb statistics

Distance: 0.86 km
Elevation gain: 53 m
Average gradient: 6.1%
Climb category: Uncategorized
Start elevation: 48 m
Summit elevation: 100 m

Current weather

At the climb start

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Weather data: MET Norway

03 / Your effort

How long would it take?

Enter the power you could hold for the whole climb. We calculate a moving time from the elevation profile and the forces you ride against.

Sustained power

W/kg

Use your intended climbing effort, rather than FTP unless you can hold it for the predicted duration.

Rider weight (kg)

Bike + kit weight (kg)

Bike + kit includes clothing, bottles and luggage.

Advanced settings

Defaults represent a road-bike scenario. Adjust these settings to match your tyres, drivetrain and riding position.

Effective drag area (CdA) (m²)

Rolling resistance (Crr)

Drivetrain efficiency (%)

Modelled moving time

4 min

Power throughout: 225 W
Average speed: 13.8 km/h

Based on the 0.86 km elevation profile. Assumes steady power, with no stops, braking or drafting. Rounded to the nearest minute.

The science behind the calculation

For each part of the stored profile, we solve the steady-state cycling power equation for speed, then add distance ÷ speed across the climb. Gravity uses rider + equipment weight; available power is W/kg × rider weight. This uses the profile’s distance and elevation together, without mixing in another route’s metrics.

Power × efficiency = gravity + rolling resistance + air resistance + bearing losses

The resistance equations are adapted from Martin et al. (1998), Validation of a Mathematical Model for Road Cycling Power. Air density changes with profile altitude using NASA’s standard-atmosphere model. This calculator’s adaptation has not been independently validated.

It predicts travel at the power you enter, including on descents. It does not model acceleration, cornering, braking, traffic, wind, changing weather or fatigue. At altitude, choose power you can sustain there: thinner air reduces drag, but this model does not predict its effect on your ability to produce power. Profile quality and assumed equipment settings also affect the result.

04 / On the ground