## What does RG differential mean?

Differential of RG is the difference between the maximum and minimum Radius of Gyration. RG-differential indicates the bowling ball’s track flare potential. These measurements describe the bowling ball flare potential rating and indicate if the flare potential is low, medium, or high.

## What is RG value?

The Rg represents the root mean square distance of the molecule’s components from the mass center of the molecule. The single Rh and Rg numbers generated by a GPC/SEC analysis are the weight average values obtained from compiling the calculated values at each data slice.

## What is considered a low RG bowling ball?

RG ranges from 2.460” – 2.800” Low RG: 2.460” – 2.570” Med. RG: 2.570” – 2.680”

## What do numbers on bowling balls mean?

Bowling balls have a RG (Radius of Gyration) converted to a scale of 1-10. Mass distribution numbers describe the distribution of mass in the bowling ball. High RG numbers indicate that the balls mass is distributed more towards the cover (cover heavy) which promotes length through the heads of the bowling lane.

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## What is intermediate differential bowling?

Intermediate differential – The difference in radius of gyration between the Y (high RG) and Z (intermediate RG) axes on the bowling ball. The higher the the intermediate differential the stronger a balls PSA.

## How do you read bowling ball specs?

The circumference of a bowling ball 13 lbs. or greater is 26.7″ minimum, 27.002″ maximum. The diameter of a bowling ball 13 lbs. or greater is a minimum of 8.5″ and a maximum of 8.595″. The Radius of Gyration of a 13 lb. ball or greater is a minimum of 2.46″ and a maximum of 2.8″.

## What is a benchmark bowling ball?

The benchmark ball is generally a ball that fits in the middle of your bag in terms of strength and angularity. This is to not only make it useful on a variety of conditions, but also to help you determine your environment when facing unknown conditions.

## What is bowling ball flare potential?

The bowling ball flare potential is the maximum amount a bowling ball can migrate while traveling down the lane. Flare potential can be used as an indicator for which bowling balls are best suited for certain patterns and conditions i.e. oily lane conditions (high flare) and or drier lane conditions (low flare).

## What is the mass bias on a bowling ball?

The term “mass bias” refers to the fact that the center of mass of a bowling ball is not located directly under the pin of the ball. Having a “mass bias” causes the center of gravity (CG) mark of a ball to move away from the pin, resulting in a pin-out ball. Therefore, all pin-out balls have a mass bias.

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## What is PSA in bowling?

The preferred spin axis (PSA) on an asymmetrical ball is one of the most misunderstood topics surrounding bowling ball technology in today’s game. A majority of bowlers don’t realize how important it is and how much more the ball reaction can be fine-tuned when drilling an asymmetrical ball.

## How do bowling ball sizes work?

A bowling ball should weigh 10 percent of your body weight (up to 16 pounds), which means you really shouldn’t be grabbing, say, an 8-pound ball if you weigh 150 pounds. You want some weight to the ball, but it shouldn’t be so heavy that it’s uncomfortable. Young bowlers should choose balls in the 6 to 14 pound range.

## What are bowling pin numbers?

The locations of the pins are assigned numbers 1-10. The pins in the back row have the numbers 7-10, the pins in the row above the back row are numbered 4-6, the pins in the second row are numbered 2-3, and the head pin is pin 1. All pins will earn the bowler one point if they are hit.

## What are the different sizes of bowling balls?

Candlepin bowling balls have a weight of between 2 lb 4 oz (1.0 kg) and 2 lb 7 oz (1.1 kg), and a diameter of 4.5 in (11 cm)—much smaller than the 8.5 in (22 cm) balls in ten-pin bowling, and even smaller than the 5.0 in (13 cm) balls in duckpin bowling.

## Do bowling balls have serial numbers?

Before I stopped bowling back in 1996, the first digit of a bowling ball’s serial number was the way of identifying what year it was made (e.g., 5B112345).