

RAM Mounts Handlebar U-Bolt Double Ball Mount with Round Plate (RAM-B-149Z-202U) is a complete kit for handlebars, rails and tubes from 12.7 to 31.8 mm (0.5"–1.25") in diameter. It combines a zinc-coated U-bolt base, a medium B-size double socket arm (95 mm overall) and a 63.5 mm round plate with the universal AMPS pattern that fits most RAM and third-party cradles. Ideal for motorcycles, bicycles, carts, ATVs and boat rails.
📦 What's in the box – RAM-B-149Z-202U
- U-bolt rail base with ball – B-size ball, rails Ø 12.7–31.8 mm (RAM-B-231ZU)
- Double socket arm – B-size, medium, 95 mm overall, 76 mm socket to socket (RAM-B-201U)
- Round plate with ball – Ø 63.5 mm, 4-hole AMPS + 3-hole 120°, B-size ball (RAM-B-202U)
- U-bolt for 12.7–25.4 mm rails – 1/4"-20, zinc-coated
- U-bolt for 25.4–31.8 mm rails – 1/4"-20, zinc-coated
- 2 nyloc nuts – 1/4"-20
- 2 rubber caps – cover the U-bolt ends
- U-bolt spacer – narrows the rail to a minimum of 12.7 mm
💡 To get started, you might also consider a device holder with the AMPS hole pattern, such as the X-Grip holder for 9"–11" tablets.
Key Features
- Complete kit – base, B-size double socket arm and device-side plate in one package
- Handlebar U-bolt base – two zinc-coated U-bolts and a spacer fit rails Ø 12.7–31.8 mm (0.5"–1.25"); rubber caps cover the ends
- Adjustable at both ends – medium arm, 95 mm overall; one knob locks both ball joints
- Universal AMPS plate – 63.5 mm round plate with 4-hole AMPS and 3-hole 120° patterns
- Load rating – up to 2 lb (0.9 kg) in standard use and 1 lb (0.45 kg) in heavy-duty use; ideal for phones, GPS units, scanners and small tablets
- Built for harsh conditions – powder-coated marine-grade aluminium and high-strength composite, backed by RAM's lifetime warranty
Compatibility
- Handlebars, rails and tubes Ø 12.7–31.8 mm
- Device holders and cradles with the 4-hole AMPS pattern (30 × 38 mm)
- Accessories with the 3-hole 120° pattern (Ø 46 mm)
Technical Specifications
| Part Number | RAM-B-149Z-202U |
|---|---|
| Product Type | Mounting kit, B-size |
| Connection | B-size (1" / 25.4 mm) ball; round 63.5 mm plate with 4-hole AMPS (30 × 38 mm) and 3-hole 120° (Ø 46 mm) patterns |
| Arm Length | 95 mm (3.73") overall; 76 mm (3") socket to socket |
| Load Capacity | 2 lb (0.9 kg) standard use; 1 lb (0.45 kg) heavy-duty use |
| Clamp Range | Ø 12.7–31.8 mm (0.5"–1.25") |
| Material | Powder-coated marine-grade aluminium and high-strength composite |
| Weight | 0.32 kg (0.7 lb) |
| Warranty | Lifetime warranty (RAM Mounts) |
| In the Box | U-bolt rail base with ball, double socket arm, round plate with ball, u-bolt for 12.7–25.4 mm rails, u-bolt for 25.4–31.8 mm rails, 2 nyloc nuts, 2 rubber caps, u-bolt spacer |
You will find matching cradles, holders and more RAM mounting parts in our Mobile Terminal Accessories collection. Planning a vehicle or forklift installation, or ordering for a whole fleet? Contact us for project support and volume pricing.
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