Selkirk Pro S1 Review: The Durability King With a No-Crack Warranty

The Pro S1 attacks the oldest annoyance in outdoor pickleball — cracked balls — with a seamless rotomolded build, and reviewers largely agree it resists cracking — but several report balls going out of round, and one 2026 ranking places it behind the X-40 on holding shape. Selkirk's one-year warranty covers visible cracks only (US buyers, proof of purchase, minimum 4 balls, $6 fee; out-of-round balls excluded).

It plays faster than the X-40 — closer to Dura pace — which aggressive players count as a second win, though players who like the X-40's moderate speed will notice the difference. The real cost is up front: per ball it's the most expensive of the majors, and while it has grown into wide tournament acceptance it still isn't the ubiquitous standard the X-40 is. On lifetime cost per session, the durability math usually favors it anyway.