Verdict from +100 user reviews

6 reasons to buy

  • Some people have noted that the in-shoe experience of the Asics Gel Cumulus 21 SP is snug yet accommodating.
  • The vibrant color schemes of the SP version are welcomed by those who like high-tier aesthetics for their shoes.
  • Several testers have claimed that the heel part of the platform relieves ankle pain.
  • The padding in the collar region is comfortable for many wearers.
  • All-day use is attainable because of the breathable and form-fitting upper, based on a handful of reviews.
  • The lightweight structure of this Asics running shoe is appreciated for permitting unencumbered running sessions.

2 reasons not to buy

  • A few people believe that the toe box causes the toes to bunch together uncomfortably.
  • Some people are claiming that the underfoot platform is not as flexible as expected, limiting the potential of each step.

Bottom line

The reaction towards the Asics Gel Cumulus 21 SP has been positive. This neutral running shoe is considered comfortable and agreeable. Ankle pain is a phenomenon that is apparently held back by the padded collar and the cushioning system. Inversely, the stiff midsole and limited toe box space are criticized.

People who like running shoes that offer consistent comfort on the roads can enjoy the Gel Cumulus 21 SP.

Tip: see the best running shoes.

Good to know

Daily runs and activities that aren’t focused on athleticism are a mix of elements that permit the Asics Gel Cumulus 21 SP to catch the attention of people. The sporty yet uncluttered construction of the product aims for a welcoming foot-wrap while the feature-laden underfoot platform delivers support and lively steps. The SP moniker denotes the release of extra-vibrant colorways that would make this shoe pop in the visual department.

The standard sizing scheme has become the basis of the Asics Gel Cumulus 21 SP’s creation. Runners are encouraged to use their usual choices of size when it comes to getting their own pair. However, it would benefit each person to test the shoe or observe other people’s reviews (ones that cover the aspect of size) to fully enjoy the in-shoe experience.

Being able to appreciate a secure yet accommodating foot-wrap can change the quality of the run and the capacity of the runner to enjoy the protective and performance-encouraging features of the shoe. The stretchy fabrics of the upper unit’s fabrics and the semi-curved shape of the platform work together to entice the foot to move with confidence and feel as if the in-shoe hug is designed specifically for that particular runner.

The external pad of the Asics Gel Cumulus 21 SP is made of AHAR® (Asics High Abrasion Rubber). This element is resistant to abrasion, so it preserves its own form, as well as the structure of the midsole unit. It also offers surface traction, a trait that is fundamental to the efficacy of the run. AHAR® graces a lot of Asics’ offerings, including the revered Gel Kayano line.

FlyteFoam® Propel is a springy cushioning unit that is tasked with providing energy to the foot as it lifts off the ground. It works with the FlyteFoam® Lyte, a lightweight piece that is able to mitigate the landing forces, to enable a comfortable and responsive experience when taking each step.

Silicon-based Gel® pieces are placed in the heel and forefoot sections of the platform. These features are meant to absorb impact shock during the foot-strike and transfer the energy back to the foot and leg for extra oomph to the performance.

The upper unit is made of engineered jacquard mesh to simulate a seamless and sock-like wrap. Breathability comes through ventilation holes that pockmark this material.

Printed overlays assist the lacing system when it comes to securing the foot and keeping it in place.


How Asics Gel Cumulus 21 SP ranks compared to all other shoes
Top 49% road running shoes
All road running shoes
Top 43% Asics running shoes
All Asics running shoes
Top 49% neutral running shoes
All neutral running shoes


The current trend of Asics Gel Cumulus 21 SP.
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Jens Jakob Andersen
Jens Jakob Andersen

Jens Jakob is a fan of short distances with a 5K PR at 15:58 minutes. Based on 35 million race results, he's among the fastest 0.2% runners. Jens Jakob previously owned a running store, when he was also a competitive runner. His work is regularly featured in The New York Times, Washington Post, BBC and the likes as well as peer-reviewed journals. Finally, he has been a guest on +30 podcasts on running.