Roto Grip RST X-1
MicroTrax Hybrid
Factory finish
3000 Abralon
Black / Dark Forest / Forest
Core (15 lb)
Roto Star Tour
R.G. / Differential / Bias
16 lb2.5200.0490.015
15 lb2.5300.0530.016
14 lb2.5500.0530.016
13 lb2.5700.0320.010
12 lb2.5900.0290.008
Release date
November 27, 2020
Balls with the same cover
These balls have the same MicroTrax Hybrid cover as the RST X-1:
NameCore (15 lb)Released
Roto Grip Magic GemMagic Gem
Roto Grip
Defiant LRG
Oct 20, 2023
Roto Grip RST X-3RST X-3
Roto Grip
Roto Star Tour
Aug 19, 2022
Balls with the same core
These balls have the same 15-lb Roto Star Tour core as the RST X-1:
Roto Grip RST X-3RST X-3
Roto Grip
Aug 19, 2022
Roto Grip RST X-2RST X-2
Roto Grip
eTrax PLUS
Aug 20, 2021
From the manufacturer

Dating back to the mid-1950’s, there is a reason Roto Grip is often referred to as the “Original High-Performance Bowling Ball Specialists.”

Our latest asymmetrical creation continues that tradition with the development of the RST Core which produces consistent core torque and energy transfer down lane where it is needed most.

From there we formulated the most versatile MicroTrax Hybrid Coverstock to date which produces optimum responsiveness to both oil and friction.

It’s ok, you can thank us later!

Professional bowlers like to see continuous motion down lane with minimal deflection as the ball enters the pocket due to their rev rates usually being on the higher side. This logic was the basis of development by the R&D team as they looked to create a core that would maintain dynamics after drilling in order to maintain a higher level of core torque down lane. The larger mass at the base of the core does indeed create that. Especially since when drilled, the thumbhole will always end up near the bottom of the void area not to affect the bottom mass of the core all that much. Thus, making this core a “Tour Level” type core design.

When it all began back in the early 1950’s, Roto Star (later known as Roto Grip) quickly became known as the “High Performance Bowling Ball Specialists.”

Because of this industry leading mantra, and with the latest creation of the Roto Star Tour Core, it only made sense to go back in time to recapture the vibe and pay homage to those balls that set the standard for technology and development.

That is how the RST X-1 was born!