Are the handles on storms 4 ball rollers standard cause I had one once and it was shorter than the roto grip bags.  Hard to pull it when you are a taller person.

I found some differences in the design and quality of the Storm Rolling Thunder 4 ball bag from the Streamline version that made a difference in my buying decision.
They may not make a difference to you.

- RT has 5" sturdier, easier rolling wheels (for pulling up stairs and thru the bowling center and the parking lots.
- the side and front pockets are much larger on the RT and there are more of them.
- the zippers seem to be sturdier and of better quality.
- the bottom section of the RT opens outwards; the Streamline opens sideways.
- the nylon material of the bag itself seems better and more durable on the RT.

Last year I replaced my old Rolling Thunder after 8 years of use and abuse, with a new Rolling Thunder. Even though it was more expensive than any other brand, it was better made, excellent warranty, and my experience with the old one indicated a new one was my best buy. Haven't regretted it yet.

(and, no, I don't get a commission if you buy one.  )

I have the Rolling Thunder 4 ball bag. The bearings wore out. Called Storm and ordered the new ones. They sent them to me for free. Good for another 10 years.