- Ultra Sonic

First Impressions
With the Ultra Sonic, Roto Grip brings a fascinating new development to the market, one that stands out above all for its exceptional length and late reaction. Inside works the dynamic Sonic Symmetric core, which guarantees very clean motion through the front part of the lane with a 2.55 RG and a 0.040 differential. The pearl reactive cover is specifically tuned to store the ball's energy extremely efficiently. The surface, with a polished finish, massively supports this trait by letting the ball glide effortlessly through the heads without building friction early. Visually the ball is a real eye-catcher, and it immediately conveys that this model was designed primarily for later, sharper changes of direction. The technical match between core and cover is extremely harmonious and purposeful here.
Comparison
Comparing the Ultra Sonic with the Storm Tropical Surge, the glaring differences in backend reaction stand out immediately. The Storm Tropical Surge tends to read a bit earlier, while the Ultra Sonic holds its energy a decisive fraction longer and then reacts noticeably more aggressively to the dry area. That characteristic makes it the perfect complement in your arsenal once the Tropical Surge starts losing energy in the pocket or entering too flat. Although both balls are aimed at lighter oil patterns, the Ultra Sonic offers a noticeably more dynamic angle. It is the ideal solution for situations in which the Tropical Surge no longer develops enough drive, since it generates the necessary entry angle.
On the Lanes
This ball shows its greatest strength once the lane has been played on a bit and the transition has clearly set in. It needs a certain amount of friction in the backend to develop its characteristic hook, which produces maximum, explosive carry. As the boards in the front part of the lane dry up, the ball allows you to systematically move further inside and attack the pocket from a much deeper angle. It works excellently on medium to dry conditions and is an excellent choice if you're looking for a clean, quick-responding surface. Thanks to its forgiving nature on misses to the outside, it should keep scores stable at a very high level even in the late stages of a tournament.