Most running shoes do not fail all at once. Treadly tracks each pair's mileage and wear status so replacement timing is based on the shoe you actually ran in, not a rough memory.
The useful answer
A daily trainer, a carbon racing shoe, and a trail shoe can age at very different speeds. The better question is not only how many miles a shoe has, but what kind of miles those were.
Mileage range
Many trainers land in that window, but the pair's foam, surface, runner, and rotation pattern matter. A fixed number is helpful only when the mileage is attached to the right shoe.
Wear signs
A shoe can still look usable after the midsole has lost its snap. Watch for new aches, flatter landings, uneven wear, or a pair that feels dull compared with your fresher shoes.
Treadly workflow
Treadly turns replacement timing into a visible status for every active shoe, with synced mileage and targets that match each pair's job.
Add each active shoe and choose a target mileage.
Sync runs from Strava or Apple Health so mileage updates automatically.
Replace or retire the pair when mileage, feel, and wear status line up.
See how lifespan changes by shoe type, training surface, and weekly mileage.
Calculate when a shoe will hit its target based on current and weekly miles.
Give every pair its own odometer and stop relying on memory.
Many running shoes last about 300 to 500 miles, but lightweight racing shoes may be lower and durable trainers may be higher. Treadly lets each pair have its own target.