Wave Inspire 21 versus Wave Inspire 22: what actually changed between generations?

The Wave Inspire 22 introduced an updated Enerzy midsole compound that is softer underfoot than the 21, and the upper mesh was revised to a more open-knit construction for better airflow. The 21 still runs well and is available at a lower price point on KM. If you train in heat or run high weekly mileage, the 22's softer cushion and ventilation are worth the step up.

How does Mizuno Wave Inspire sizing run for Indian buyers, and when should I go wide-fit?

Mizuno runs slightly narrow through the forefoot compared to Nike or Adidas at the same labelled size. Indian runners with a wider forefoot or those whose toes splay during the push-off phase will find the 2E (men) or D (women) wide versions more comfortable for distances above 10 km. Standard width works for narrow to medium feet; if in doubt, go wide.

Is the Wave Inspire suitable for Indian road conditions, including uneven tarmac and heat?

The Wave Inspire is designed for road running and handles broken tarmac and concrete well due to the wave plate's lateral stability. The outsole compound holds grip on dry and lightly wet urban road surfaces. In peak Indian summer heat above 40 degrees, the open-mesh upper on the 22 manages foot temperature better than the 21's denser knit; either generation is comfortable for early-morning runs.