The RAM Mounts Torque™ Large Rail Base – B Size is a handlebar and rail mounting base that uses rubber expansion technology to clamp onto bars or rails ranging from 0.75″ to 1.25″ in diameter. Part of RAM’s modular mounting system, it features a B size (1″ diameter) ball for connecting to phone holders, GPS mounts, or camera arms, and installs without tools using a hand-tightened knob.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | RAM Mounts |
| Model | Torque™ Large Rail Base – B Size |
| Rail Diameter Range | 0.75″ – 1.25″ (19mm – 32mm) |
| Ball Size | B Size (1″ diameter) |
| Clamping Technology | Rubber expansion with stainless steel band |
| Installation | Tool-free hand tightening |
| Material | High-strength composite and stainless steel |
| Rotation | 360° around rail |
| SKU | RAM-B-408-112-15U |
Key Features
Tool-Free Rubber Expansion Clamping: The Torque system uses an internal rubber expansion mechanism that grips the rail as you tighten the knob – no hex keys, wrenches, or tools needed for installation or adjustment on the roadside.
Wide Rail Compatibility: Accommodates handlebars, crash bars, and accessory rails from 0.75″ to 1.25″ diameter, fitting most adventure bikes, cruisers, and motorcycles with aftermarket bars or luggage racks.
Vibration-Resistant Rubber Interface: The rubber expansion layer dampens vibrations better than metal-to-metal clamps, reducing stress on mounted devices during off-road riding or long highway stretches.
360° Positioning Freedom: Rotates fully around the rail for optimal device viewing angles, allowing you to position navigation screens away from glare or adjust camera mounts for the perfect recording perspective.
Use Case Scenarios
- Mounting phone holders or GPS units on handlebars for navigation during highway tours or city commutes
- Installing action camera arms on crash bars to capture adventure riding footage from multiple angles
- Attaching auxiliary lighting controls or USB charging ports to accessory rails on touring motorcycles
Why Choose the RAM Torque™ Large Rail Base – B Size?
- Tool-free installation allows quick mounting changes without carrying hex keys on tours
- Rubber expansion technology provides superior vibration damping compared to traditional U-bolt clamps
- Fits oversized handlebars and aftermarket bars that standard clamps cannot accommodate
- Modular B size ball connects to the entire RAM ecosystem of holders and arms for endless configuration options
Pros & Considerations
Pros:
- Wide rail diameter range eliminates compatibility guesswork for most motorcycle handlebars
- Tool-free adjustment enables on-the-fly repositioning during rides
- Rubber layer protects handlebar finish from scratches or clamping damage
Considerations:
Frequently Asked Questions
Q: Will this fit my motorcycle’s handlebars if they have a non-standard diameter?
A: Measure your handlebar diameter with calipers or a tape measure. If it falls between 0.75″ (19mm) and 1.25″ (32mm), this large rail base will fit. Most sport bikes use 7/8″ bars, while cruisers and adventure bikes often use 1″ or 1-1/8″ bars – all within this base’s range.
Q: How tight can I make this mount without tools?
A: The hand-tightened knob generates sufficient clamping force for secure mounting on paved and moderate off-road conditions. For extreme off-road or track use, you can carefully use a glove for extra grip while tightening, but avoid using pliers which could crack the composite housing.
Q: Does the rubber component degrade in Indian heat and monsoon conditions?
A: RAM’s rubber expansion material is UV-resistant and designed for marine use, so it withstands Indian summer heat and monsoon moisture without significant degradation. Typical lifespan is several years of regular use before the rubber may need inspection for hardening.
Q: Can I mount this on engine crash bars or only on handlebars?
A: You can mount this base on any tubular rail within the diameter range, including crash bars, luggage racks, auxiliary light bars, or highway pegs. Ensure the mounting location doesn’t interfere with steering or lean angle.
Q: What’s the difference between this large rail base and RAM’s small rail base?
A: This large version fits 0.75″-1.25″ diameter rails, while the small rail base (RAM-B-408-37-62U) fits 0.5″-0.625″ rails. Choose based on your handlebar or rail diameter – the large version is more common for motorcycle handlebars.
Shop the RAM Torque™ Large Rail Base – B Size at Custom Elements with fast shipping across India. Complete your riding setup:
Build a secure, tool-free mounting system that adapts to your riding needs with RAM’s modular approach to motorcycle device mounting.






















































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