The Ace Line DuraFlex F Model US fairway driver is an understable fairway driver with a noticeable finish, molded in DuraFlex plastic. It's built for lower arm speeds wanting longer S-shots and power players who want an understable option, and it's at its best on long S-curves and controlled turnovers. Ace Line discs are made by Prodigy, and this DuraFlex run is a dependable pick for your bag. Discs in this listing weigh 170-175g.

DuraFlex Plastic

DuraFlex is Ace Line's premium blend, durable enough to stand up to time and the elements while still giving excellent grip. Ace Line says it stays nice and grippy from the very first flight to long after the disc has slowly broken in.

The Mold

The F Model US's high-speed turn makes it drift right for right-hand backhand throws, but what makes its flight unique is its noticeable finish. That gives lower arm speeds a great disc for longer S-shots and gives power players an understable option that can handle some torque.

Stability

The F Model US is understable. Understable discs turn away from your throwing arm at speed, making turnovers and hyzer-flips easier and helping lower-power players fly straight. For right-hand backhand (RHBH) throwers, it tends to drift right during the fastest part of its flight, then shows a gentle fade back to the left at the end. Left-hand backhand (LHBH) throwers will see the mirror image, drifting left early and fading right at the end. Forehand flights flip that pattern: right-hand forehand (RHFH) follows the LHBH line and left-hand forehand (LHFH) follows the RHBH line. It suits beginners who need help getting straight flights as well as advanced players who want to shape turnovers.

Flight Numbers

Flight Chart

Other F Model US Discs Available

Looking for a different plastic, stamp, or edition? Here are the other F Model US listings in our shop.

Discs That Pair Well With the F Model US

• Ace Line DuraFlex F Model S (10/5/-1/3): A stable, accurate fairway driver for accurate fairway drives.
• Ace Line DuraFlex F Model OS (10/5/2/4): A longer, overstable fairway driver for dependable overstable drives.
• Ace Line DuraFlex M Model US (4/5/-1/1): A reliable, understable midrange for any bag for straight lines and turnovers.
• Ace Line DuraFlex D Model US (13/6/-3/1): An understable distance driver built for beginners and slower arm speeds for easy max distance.

FAQ

Is the Ace Line F Model US good for beginners?

Yes. The F Model US's understable flight helps newer players get straight, easy distance.

Is the Ace Line F Model US overstable?

No. The F Model US is understable, rated 10/5/-2/1. Its turn makes it a better fit for turnovers and hyzer-flips than hard fades.

What's the difference between DuraFlex and ProFlex plastic?

DuraFlex is stiffer and wears in a bit faster. ProFlex is less stiff and translucent, and takes longer to wear in.

What do the letters in Ace Line disc names mean?

The first letter is the disc type (P for putter, M for midrange, F for fairway driver, D for distance driver), and the second part is the stability: S for stable, US for understable, and OS for overstable. So the F Model US is an understable fairway driver.

What disc is similar to the Ace Line F Model US?

The Ace Line DuraFlex F Model S (10/5/-1/3) is the stable version with less turn.

How far does the Ace Line F Model US fly?

With an average arm, expect roughly 360 feet. Distance depends heavily on your power and form, so stronger throwers will go farther and newer players shorter.