For longer drives -play your number™

Compression Matters.™

For longer drives
-play your number™

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Don't give up distance
by playing the wrong ball
for your swing speed

Using the ProCheck® will give you the confidence that you are playing a ball right for you.



  1. Find your average driver distance.

  2. Find your swing speed.

  3. Find the right compression.
    Then finally,

  4. Use the ProCheck® device to test the balls that are right for you.


1 Bar, Ball Too Soft - 8 Bars, Ball Too Hard

How to use your ProCheck® 


7 easy steps to measure ball compression.

Soft as a grape or hard as a rock? ProCheck® it anywhere!


Playing the wrong ball can reduce distance by 10-20% 

It is well understood that a golfer will achieve the maximum energy transfer and the most driving distance if the hardness (compression) of the ball is matched to the swing speed of the club. Golfers with slower swing speeds (60-70 mph) should play softer golf balls, and those with fast swing speeds (100-110 mph) should play firmer golf balls. Matching swing speed with ball compression causes the ball to have the optimum degree of flattening at impact to create a trampoline-like energy transfer. Too much flattening or too little reduces the energy transfer. This concept is well understood in the golfing world.

For Example

Tom determines that his swing speed is 80 mph because his drives usually carry 180 yards; that calls for a 68-79 compression ball; that translates to 3 compression bars -Soft. Tom will get his longest distance playing ball measuring the SFT. range on the ProCheck.®

Bill is a long ball hitter with a 110 MPH swing speed and should be playing a ball in the 103-113 range, 6 bars, which would read FRM. on the ProCheck.®

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But Did You Know?

Temperature changes make a difference.

On a very hot day, the ball loses compression and you should play a harder ball than usual. On a cold day, the ball gets harder and you should play a softer ball to get the maximum distance. So whether you are teeing it up on a Saturday morning with a brand new ball or just reaching into your bag for something white — the compression may be much different than what you want and that will affect your distance by 10-20%. Now you can test your golf ball’s compression with a sophisticated hand held device that will give you confidence that the ball you are playing is right for you. You can be sure the compression of that ball matches your swing speed.

What is my swing speed?

You can get that number by visiting a pro or a golf shop equipped with a swing speed measurement device. Or you can refer to the chart on the How It Works page to get a good estimate based on your driver distance. The chart then shows the right compression (ATTI #) and the right number of compression bars on the ProCheck™ display.

Compression Varies

Even with brand new balls out of the box there is variation in compression. Each manufacturer measures compression with a laboratory device called an ATTI tester. Each manufacturing year’s run is given an ATTI number based on the average compression of a sample of balls. These compression numbers are published, GBT Data Chart Overall Compression Cover Hardness Manufacturer. But these numbers are averages and there can be a significant difference from ball to ball, even in the same box. Some manufacturers have tighter control over compression variability than others.

Compression Changes

Today’s ball covers are so good that even old tired balls look new. Also, one summer in the trunk of a car can change compression a lot. And, that new looking ball you find in the woods may have spent the winter there and its compression has changed. Purchased, used balls are quite affordable but are frequently sourced from water hazards and look new, but have lost compression.