The Trend is Belmo ball number 4, and while I hesitate to say it’s the best one, I quite liked the Pro Motion, it’s definitely not similar to the previous 3. While it features the same Piston core from the Pro Motion, that’s the only thing they have in common, the covers are on the opposite end of the spectrum. R2S Pearl on the Trend is quite clean and very responsive to friction. The Piston core has an identifiable rolly continuation, so the general roll is familiar, but where the Pro Motion is early and very smooth, the Trend glides through the fronts and really booms down lane. The Trend is longer and stronger than the Idol Pearl, but not quite as long and quick as the Astro PhysiX, but it’s in that same vein of reaction. While the previous Belmo balls had specific reactions in mind, the Trend is designed to be useful for the vast majority of bowlers on the conditions they see the vast majority of the time.