Tailwind Tally

Tailwind Tally shows how much of a bike route is tailwind versus headwind for a given wind direction, ridden forward or the other way around. Load a route by dropping in a GPX file, sharing one from Strava, Mail, or Files, or connecting your Strava account and picking straight from your own routes. The route map is colored by wind angle: full tailwind, tailwind, crosswind, headwind, full headwind. You get the split for the whole route and for just the second half, since that's usually the part that decides how a ride actually feels. A 360 degree sweep shows the easy fraction for every possible wind direction, so you can find the best wind for a given loop or check how bad a specific direction would really be. There is also a simple effort estimate: how much harder a given wind speed makes the ride at your normal cruising speed, compared to riding it on a calm day. Everything runs on…