Two Daily Running Icons Go Head to Head
The Nike Pegasus and Adidas Ultraboost are arguably the two most recognisable daily running shoes on the planet. Both have been through dozens of iterations, and in 2026 the Pegasus 42 and Ultraboost 5 represent each brand's latest thinking on what an everyday trainer should be. We compared them across 6 UK retailers — including Size?, JD Sports, Nike.com and Adidas.co.uk — to help you decide which deserves a spot in your rotation.
Cushioning and Ride Feel
The Pegasus 42 uses Nike's ReactX foam paired with a visible Zoom Air unit in the forefoot. The result is a firm, responsive ride that rewards faster-paced efforts and tempo sessions. Heel-to-toe drop sits at 10mm, which encourages a natural rolling gait without forcing midfoot striking. The Ultraboost 5 takes a different approach: a full-length Boost midsole delivers soft, energy-returning cushioning that excels during longer, slower runs and all-day wear. Its 10mm drop matches the Pegasus, but the sensation underfoot is noticeably plusher and more forgiving on tired legs.
| Spec | Nike Pegasus 42 | Adidas Ultraboost 5 |
|---|---|---|
| Weight (UK Men's 9) | 283g | 310g |
| Heel-Toe Drop | 10mm | 10mm |
| Midsole Tech | ReactX + Zoom Air | Full-length Boost |
| Price From (UK) | £120 | £117 |
| Best For | Tempo runs, speed work | Long runs, all-day wear |
| Colourways Available | 8+ | 6+ |
Upper Construction and Fit
Nike wraps the Pegasus 42 in an engineered mesh that balances breathability with structure. The midfoot Flywire cables lock the foot in place during faster efforts, and the padded collar prevents heel slip without adding bulk. Adidas opts for a Primeknit upper on the Ultraboost 5 — a sock-like construction that hugs the foot with minimal seams. It is exceptionally comfortable straight out of the box but offers slightly less lateral support than the Pegasus during sharp cornering or uneven terrain.
Outsole Durability
The Pegasus 42 features a waffle-pattern rubber outsole with strategic carbon-rubber reinforcements in high-wear zones. Runners typically report 600 to 800 kilometres of usable tread life. The Ultraboost 5 uses Continental rubber — the same compound found on Continental car tyres — which delivers excellent wet-surface grip and durability. Most users get 500 to 700 kilometres before significant outsole wear, slightly less than the Pegasus but with superior wet traction throughout.
Price and Value Across UK Retailers
At full retail the Pegasus 42 costs £129.99 on Nike.com, while the Ultraboost 5 sits at £159.99 on Adidas.co.uk. Discounts are common on both models. We found the Pegasus 42 from £120 at JD Sports and the Ultraboost 5 from £117 at select retailers thanks to seasonal promotions — making the Ultraboost the better value at current sale prices despite its higher RRP. Both models regularly appear in multi-buy offers at Size? and Foot Locker.
Choose the Pegasus 42 if you want a lighter, more responsive daily trainer for mixed-pace running. Choose the Ultraboost 5 if cushioned comfort and all-day versatility matter more than outright speed.
