Quick answer

The Timp 5 is the lighter, grippier evolution of the Timp 4. If you want a trail shoe that feels faster on rowdy terrain and still keeps Altra's roomy toe box and zero drop, the Timp 5 is the better pick. Runners who prefer a slightly more substantial underfoot feel or who already own a Timp 4 that fits well may not need to switch.

What actually changed from Timp 4 to Timp 5

The headline update is weight: Altra dropped a few ounces from the Timp 4 to the Timp 5. That matters on long trail days because less shoe means less fatigue with every stride. The second change is the outsole. The Timp 5 uses a Vibram Megagrip outsole that, according to Vibram, offers unparalleled grip on both wet and dry surfaces. On loose gravel, damp roots, or slick rock, that translates to more confidence when you're moving quickly.

Fit and feel: what stays the same

Both the Timp 4 and Timp 5 share Altra's signature fit: a roomy toe box that lets your toes splay and a zero-drop platform that keeps your heel and forefoot level. If you liked the Timp 4's fit, the Timp 5 should feel familiar. The lighter build may make the shoe feel slightly less padded underfoot, but the secure midfoot hold remains. For sizing, most runners stick with their normal Altra size, though if you have a high-volume foot or wear thick socks, consider going up a half size.

Who should upgrade and who should wait

If you run technical trails, race short to middle distances, or want a shoe that feels nimble on climbs and descents, the Timp 5 is a clear step forward. If you use your Timp 4 primarily on smooth, buffed trails and value a slightly more cushioned ride, the older model still works fine. There's no rule that says you must replace a shoe that's still serving you well.

Trade-offs to weigh

  • Weight vs. underfoot protection: The Timp 5 is lighter than the Timp 4, which reduces fatigue on long runs but may feel less cushioned on very rocky, high-impact trails. If you prioritize maximum protection over speed, the Timp 4 might still suit you. Choose the Timp 5 for speed and agility; choose the Timp 4 if you want a more substantial ride.
  • Grip vs. versatility: The Vibram Megagrip outsole on the Timp 5 excels on wet and dry technical terrain, but it may wear faster if you frequently run on pavement to reach the trailhead. If your runs are mostly road-to-trail, consider a shoe with a more durable outsole compound.
  • Fit consistency vs. slight changes: The Timp 5 keeps Altra's roomy toe box and zero drop, but the lighter build can feel slightly different in step-in comfort. Some runners may notice a firmer ride initially. Try the Timp 5 on before committing if you're sensitive to small fit changes.

Product facts

  • Men's Timp 5: It’s grippy. It’s light. And it’s ready to get rowdy. This is trail running in the Timp 5. We built it with the same comfort you love but dropped a few ounces. With a lighter weight and grippier outsole, it’s ready for a full day of a full send. A new grippy outsole gives you the confidence to unlock the magic of rowdy terrain. According to Vibram®, the Vibram® Megagrip outsole offers unparalleled grip on both wet... The weight drop and Megagrip outsole make the Timp 5 more agile and sure-footed on wet or loose trails, so you can run faster with less worry about slipping.
  • Women's Timp 5: It’s grippy. It’s light. And it’s ready to get rowdy. This is trail running in the Timp 5. We built it with the same comfort you love but dropped a few ounces. With a lighter weight and grippier outsole, it’s ready for a full day of a full send. A new grippy outsole gives you the confidence to unlock the magic of rowdy terrain. According to Vibram®, the Vibram® Megagrip outsole offers unparalleled grip on both wet... The same updates apply to the women's version, so female runners get the same lighter, grippier ride.

Which Timp is right for you?

Best for

  • Trail runners who want a lighter, faster shoe for technical terrain
  • Runners who prioritize grip on wet or loose surfaces
  • Those who already love Altra's zero-drop, roomy toe box fit

Not for

  • Runners who need maximum underfoot cushioning for very rocky trails
  • Those who primarily run on pavement and want a durable road-to-trail shoe
  • Runners who are perfectly happy with their current Timp 4 and don't need an upgrade