Between races, record your descents with a RaceBox or any GPX tracker, and R4WRUN turns them into speed, corners and slides — free.
Upload a run
Upload a run — on your profile or your runs page — takes a RaceBox CSV or a GPX file, or imports straight from a RaceBox over Bluetooth.
CSV is best
RaceBox CSV carries real speed, G-force, gyro and elevation. GPX is location only, so speed and G-force are estimated.
Bluetooth
Works in Chrome or Edge on Android, Windows, macOS and Linux. Safari has no Bluetooth — use the CSV upload there. Runs you already have are skipped.
A whole session?
Recorded several descents and the rides back up in one file? R4WRUN finds the separate runs and saves each one.
Who sees it
Make a run Public, Followers (only riders who follow you) or Private, and rename or delete it, whenever you like.
Read a run
A run opens on its route map, coloured by speed or slope, with the headline numbers and Full telemetry: speed, lateral G and elevation in sync. Press Replay to watch it back with Follow rider, or tilt the map into 3D terrain.
Moments
0–100 km/h, fastest 100 m, peak braking and cornering G… tap one to find it on the map.
Sector
Drag across the speed chart to look at just one stretch, then go back to Full run.
Export clip
Renders the board, the speed and the clock as a video overlay to drop over your own footage.
Likes and comments
Riders can like and comment on public runs — and pin a comment to a corner.
Corners and slides
Every corner is detected with its speed in, slowest and out, the braking and the peak G. On a skateboard with a firmly mounted RaceBox, slides are found inside each corner — slide angle, speed lost, heelside or toeside. If none show up, the run tells you why.
Spots, boards and your map
Runs are grouped by spot. Each spot has a Fastest runs board — follow the spot to hear about new runs there. Your runs page puts every spot on a world map, with your lifetime totals.
Timed sections
Time any stretch like a real timing system: a start line, a finish line and up to 5 splits. Found a good one? Suggest it for the spot.
Compare two runs
Put one of your runs next to anyone's at the same spot: a live time gap all the way down, Ghost race to play both together, and Why to show where the gap was made. Ask the coach (Premium) explains it in plain words.