Designed to meet the needs of the competitive triathlete, this racing shoe features a zero drop platform to encourage an efficient stride, with enough cushion to keep your tired feet happy to the finish line
Fully cushioned zero drop shoe for running, triathalons, road racing, speed work
The Altra 3-Sum was the brand's first shoe designed for the rigors of triathlons
It'll keep you speedy through transitions with its tri-specific specs and help you run naturally through the finish line with the brand's signature technology
Transition times shouldn't cause stress, so keep them to a minimum
Featuring a seamless upper for sockless wear and a quicklace system that allows you to fly through T2
Easy pull-on tabs take any fumbling with your shoes out of the equation, especially when you add a quick-lacing system to the 3-Sum's design makeup
Feet get to work and flex naturally because of Altra's zero-drop platform, which encourages a midfoot strike with minimal impact
Make sure you're ready to run the minute you hop off your bike
