Question: what is the difference between gel nimbus 20 and 21?
Answer: The Nimbus 21 is actually MORE stable and counters twisting better than the Nimbus 20! The outsole/midsole has at the same time become about 5 mm wider than the Nimbus 20. Such a wide base/platform only makes the Nimbus 21 even more stable. Asics GEL-Nimbus 21 (left) and Asics GEL-Nimbus 20 (right).