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RAM Mounts - Arm Sizes

RAM Arm Sizes

Arm Sizes Short Arm Medium Arm Long Arm
Overall Length
2.42" / 6.14cm
3.73" / 9.47cm
6" / 15.24cm
Socket to Socket Length
1.75" / 4.45cm
3" / 7.62cm
5.31" / 13.49cm

RAM Round Plate with Ball | B Size


In stock

Sizing Guide

The RAM Round Plate with Ball connects to any RAM® B size double socket arm. The plate includes pre-drilled holes, made of aluminium.

The RAM Round Plate with Ball consists of a 1″ / 2.54cm / 2.54cm B size rubber ball connected to a 2.5″ / 6.35cm / 6.35cm diameter round plate. This mounting component includes pre-drilled holes using the universal AMPS hole pattern.


  • 2.5″ / 6.35cm round plate connects to RAM® device holders containing the universal AMPS hole pattern
  • Hole Pattern: 4-Hole AMPS: 1.181″ / 3.00cm x 1.496″ / 3.80cm | 3-Hole 120-Degree: 1.812″ / 4.60cm Diameter
  • B size 1″ / 2.54cm / 2.54cm RAM® rubber ball allows for connection to any B size RAM® double socket arm
  • Ball and socket technology allows for near-infinite adjustability
  • Screw size for plate holes: #8, #10, M4 or M5 screws
  • If Pairing with any RAM®Holder, the holder will come with the necessary hardware to connect to your mount.
  • Made of powder-coated, marine-grade aluminium for durability and reliability in the most demanding environments
  • Weight Capacity: Standard Use: 2 lbs / 0.907kg | Heavy-Duty Use: 1 lb / 0.454kg
  • Weight: 0.15 lb / 0.068kg
  • Backed by a lifetime warranty

 The RAM set including the double socket arm is available: RAM Universal Double Ball Mount with Two Round Plates


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