A big groove in the rim makes for an interesting feel in the hand.
Innova tested the whole under groove with the monarch. They decided to push the envelope and see what would happen if they put that groove on a larger rimed driver.
Groove by Innova Champion Discs

PDGA Official Specifications
Diameter:
21.1 cm
Height:
1.7 cm
Rim Depth:
1.2 cm
Rim Width:
2.4 cm
Max Weight:
175.1 g
Date Approved:
Dec 5, 2008
Who is the manufacturer?
The X-Out Champion Groove is made by Innova.
What is the disc model?
This is the Groove. Check it out on our famous Flight Guide! You can also check out more Groove discs here.
What type of disc is this?
This disc is a Distance Driver.
What are the flight numbers for this disc?
The flight numbers are 13 / 6 / -2 / 2. Flight numbers are displayed as Speed / Glide / Turn / Fade. You can compare this disc on our Flight Guide too.