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Brooks Cascadia 17 vs On Running Cloudultra 2
Weight and specs compared for 2026 — and which one to choose.
On Running Cloudultra 2 is the lighter option — 10 g lighter than the Brooks Cascadia 17 (2% less weight). If grams matter to you, that is the one to beat.
Brooks Cascadia 17
630 g
Versatile trail shoe with rock plate and DNA Loft cushioning.
Full details →On Running Cloudultra 2
620 g
Ultra trail shoe with CloudTec cushioning for long distances.
Full details →Brooks Cascadia 17 vs On Running Cloudultra 2: which should you buy?
If saving weight is your priority, the On Running Cloudultra 2 wins — at 620 g it is 10 g (2%) lighter than the Brooks Cascadia 17 (630 g). That said, the heavier option may justify the extra grams with more capacity, durability or comfort, so weigh the trade-off against how you'll use it.
See where both rank against everything else in this category on the lightest footwear page, or browse the full gear weight database.