THE PADDLE REGISTER · COMPANY FILE

Diadem

A tennis-string company that built a pickleball line. Launched the full-foam Warrior BluCore in June 2025 and signed Japan's top player in January 2026. Named in JOOLA's patent case and, as of mid-September 2026, had not answered it; JOOLA is seeking a default judgment.

Based
Florida
Lines
Warrior BluCore · Edge · Vice · Hanabi (on the USAP list, not launched)
Pros
Yuta Funemizu
Patents
Brand has not answered JOOLA's patent case

3 IN THE REGISTER · NEWEST FIRST

12
Jun 10, 2025 · $280 · Full foam (Gen 4) Warrior BluCore Nine variants across three shapes and three thicknesses, sold on a lifetime core warranty. Pickleball Effect credited the durability and comfort and concluded the performance gap over $100 paddles did not justify $280. It marked a tennis-rooted brand committing its flagship to foam. USA Pickleball: not confirmed here · UPA-A: not confirmed here
123
Q4 2024 · price n/a · Honeycomb + foam (Gen 3) Edge 18K Power Max Diadem's 'Max' line brought its 18K triaxial face to a thermoformed widebody late in 2024. WearTesters scored it 8/10 as a balanced all-court option best for beginner-to-intermediate players; Pickleball Union gave it 4.5/5. A representative example of established brands re-skinning proven faces onto Gen 2 construction. USA Pickleball: not confirmed here · UPA-A: not confirmed here
12
Apr 15, 2024 · price n/a · Honeycomb + foam (Gen 3) Edge 18K SP Diadem's answer to the spring 2024 power race: a thinner, thermoformed Edge 18K pitched explicitly on speed and pop. Its launch the day before JOOLA Gen 3 shows how crowded the power lane had become before USAP intervened. Reviewer coverage is thinner than for the standard Edge 18K. USA Pickleball: approved · UPA-A: not confirmed here

EVERYTHING DATED, NEWEST FIRST

  1. Jun 10, 2025 Warrior BluCore Launch: Jun 10. diademsports.com ↗
  2. Nov 15, 2024 Edge 18K Power Max Launch: Q4 · 'late 2024' per WearTesters. weartesters.com ↗
  3. Apr 15, 2024 Edge 18K SP Diadem blog post introduces the Edge 18K SP. diademsports.com ↗

the whole register · the 2026 calendar · CC0