Its record 54 grams-only weight (550ml) is achieved through its variable thickness

Golfers with more experience and power will find this disc to be moderately under stable and will display more high-speed turn from the flight

but this is the real deal

to be insufficient

It's overstable and intended for experienced players who throw with power

Halo Star Thunderbird Nummer:5 - 171g Its record 54 grams-only weightSpeed 9 Glide 5 Turn 0 Fade 2 The Thunderbird comes from strong bloodlines. The stability of a TeeBird with the speed of a Valkyrie; it can be described as a seasoned Firebird with less fade. The Thunderbird is predictable in wind and a great long range placement driver. Pros will appreciate the shot shaping ability of this driver while less expericed players will find a consistant, predictable flight.