RAM Mounts Ball Sizes & Weight Capacities

Author: Grae Olsen   Date Posted: 2 May 2017 

RAM Mounts make over 6,000 different product lines, based on a ball and socket system that has 5 different ball sizes:

"A" sized ball - 0.56" (14.22mm)

"B" sized ball - 1" (25.4mm)

"C" sized ball - 1.5" (38.1mm)

"D" sized ball - 2.25" (57.15mm)

"E" sized ball - 3.38" (85.85mm)

RAM ball sizes

Generally speaking, the RAM Mounts part number will have the ball size noted in it (eg. RAM-B-201U), except in the case of "C" sized balls, just to make things a little confusing! The "C" sized ball is where they started, so part numbers do not include the letter (eg. RAM-201U).

The choice of ball size will depend on the conditions you are going to be in, but also the weight of the unit you are mounting. RAM Mounts recommend the following capacities for each ball size:

"B" sized 1" ball - up to 2.25kg (approx 5lbs)

"C" sized 1.5" ball - up to 4.5kg (approx 10lbs)

"D" sized 2.25" ball - up to 6.75kg (approx 15lbs)

"E" sized 3.38" ball - up to 9kg weight (approx 20lbs)

For most applications you would tend to use a "B" sized ball for GPS, phone, camera, and light tablet applications, or a "C" sized ball for heavier tablets, lighter marine applications, or in rough conditions.

If you have any questions about which ball size you should be using, just contact us.

Comments (2)

D size ball

By: on 27 April 2022
Hi Rhonda, yes you can but because RAM Mounts have over 6,000 products there are many different options, probably best to contact us and let us know exactly what you're looking for, and we can help from there.

D size ball

By: on 25 April 2022
Can you buy just the ball mount without the rest of the mount assembly. If so how much is it .

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