VAM (Vertical Ascent per Hour) measures climbing rate in meters per hour. Higher grades naturally produce higher VAM because more of each step converts to vertical gain. Breaking out by grade band normalizes this effect, letting you compare climbing fitness across different terrain steepness.

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The Race Predictor calculates your predicted performance on a course based on prior race performance. The prediction accounts for race length, grade, terrain, and stoppage time. To set it up:

1) Select past races to include in your Race Predictor

2) Upload the GPX file for the race course.

The Race Predictor will calculate the GAP adjustment from the elevation profile and the terrain adjustment from terrain database surface data.

3) Adjust "Stoppage Time".

This is the amount of time when you are not moving on the course, such as stops at aid stations. The Race Predictor automatically finds races with duration within 20% of your predicted race and averages Stoppage Time for those races, if there is any. You can manually adjust this value and the prediction will update.