The RAM Mounts Torque™ Small Rail Base is a compact mounting base designed to clamp onto small-diameter round rails and tubes between 0.375 inches (3/8″) and 0.625 inches (5/8″). This size range accommodates bicycle handlebars, small motorcycle grab rails, brake/clutch reservoir mounts, and thin frame tubes where standard motorcycle handlebar clamps are too large. The Torque system’s non-marring rubber strap with integrated teeth provides secure grip on these small tubes without scratching or crushing thin-walled materials, while the integrated RAM ball socket allows connection to the full ecosystem of RAM arms and device holders.
Technical Specifications
| Specification | Details |
|---|---|
| Brand | RAM Mounts |
| Model | Torque™ Small Rail Base |
| Rail Diameter Range | 0.375 inches to 0.625 inches (9.5mm to 15.9mm) |
| Ball Size | 1 inch (B Size, based on RAM model numbering) |
| Clamping System | Rubber Torque strap with integrated teeth |
| Material | High-strength composite base with rubber strap |
| Installation Type | Tool-free hand-tightening |
| Finish Protection | Non-marring rubber contact |
| SKU | HEE-RAM-B-408-37-62U |
Key Features
Small Diameter Compatibility: Specifically sized for thin rails from 0.375″ to 0.625″ diameter, fitting bicycle handlebars, motorcycle grab rails, mirror stems, and reservoir mounts where larger Torque bases cannot clamp down sufficiently.
Non-Crushing Rubber Grip: Rubber Torque strap distributes clamping force evenly around small-diameter tubes without the point-loading of metal U-bolts that can dent or crush thin-walled aluminum bicycle bars or chrome grab rails.
Compact Base Footprint: Smaller base platform fits in tight mounting locations like bicycle stems, motorcycle mirror mounts, or reservoir brackets where standard motorcycle handlebar bases would interfere with controls or bodywork.
Universal RAM Ball Socket: Despite compact size, includes standard RAM ball socket for compatibility with RAM arms and holders, allowing you to mount smartphones, cycling computers, action cameras, or GPS units on small-diameter mounting points.
Use Case Scenarios
- Mounting cycling computers or smartphones on road bicycle and mountain bike handlebars without crushing thin-walled aluminum bars
- Installing action cameras on motorcycle grab rails or passenger handles for unique camera angles during rides
- Attaching smartphone holders to brake/clutch reservoir mounting bolts on motorcycles with limited handlebar space due to aftermarket controls or bar-end mirrors
Why Choose the RAM Mounts Torque™ Small Rail Base?
- Only RAM Torque base that fits bicycle-diameter handlebars and small motorcycle mounting points below 5/8″ where Medium and Large bases are too large to clamp effectively
- Rubber strap prevents crushing of thin-walled aluminum bicycle handlebars and chrome-plated grab rails that metal U-bolt clamps would permanently deform or crack
- Compact size allows mounting in tight spaces like near brake levers, shifters, or on short mirror stems where standard motorcycle handlebar mounts physically won’t fit
- Provides RAM’s modular ecosystem on bicycles and small mounting points, allowing you to swap devices or use the same holders across motorcycle and bicycle applications
Pros & Considerations
Pros:
- Fits small-diameter rails from 0.375″ to 0.625″ including bicycle handlebars and motorcycle grab rails where larger mounts are too big
- Rubber strap prevents crushing or denting of thin-walled aluminum and chrome tubes
- Compact footprint fits tight mounting locations near controls and bodywork
Considerations:
- Only fits small rails from 0.375″ to 0.625″ – will not fit standard 7/8″ motorcycle handlebars or larger tubes (use Medium Torque base for 3/4″-1″ bars)
- Smaller base size and ball may have lower weight capacity than larger Torque bases – suitable for smartphones and GPS units but verify compatibility before mounting heavy tablets or large camera rigs
Frequently Asked Questions
Q: Will this base fit my bicycle’s handlebars?
A: Most road bicycle and mountain bike handlebars measure between 22mm and 25mm diameter at the clamping area, which falls within this base’s 0.375″ (9.5mm) to 0.625″ (15.9mm) range. However, some oversized bicycle handlebars may require the Medium Torque base (3/4″-1″). Measure your handlebar diameter to confirm.
Q: Can I mount this base on my motorcycle’s mirror stem?
A: Yes, if your mirror stem diameter falls within 0.375″ to 0.625″. Many motorcycle mirror stems and reservoir mounting bolts use diameters in this range. This provides an alternative mounting location for action cameras or small GPS units when handlebar space is limited.
Q: Will the rubber strap damage carbon fiber bicycle handlebars?
A: The Torque system distributes clamping force evenly and has no metal contact points, making it safer for carbon fiber than metal U-bolt clamps. However, always follow your bicycle manufacturer’s torque specifications and inspect carbon regularly for any stress cracking, as excessive clamping force can damage composite materials even with rubber contact.
Q: What is the weight limit for devices mounted with the Small Torque base?
A: Weight capacity depends on the complete mounting system including the RAM arm length and ball size used. For the Small base on bicycle handlebars or thin motorcycle grab rails, limit mounted devices to smartphones, compact GPS units, or cycling computers. Heavy tablets or large camera rigs should use larger diameter mounting points with Medium or Large Torque bases for improved stability.
Q: Can I use this base for motorcycle handlebars?
A: Standard motorcycle handlebars are typically 7/8 inch (22mm) diameter, which is too large for this Small base (maximum 0.625″/15.9mm). For motorcycle handlebars, use the RAM Torque Medium Rail Base (3/4″-1″ range) instead. The Small base is only for smaller tubes like grab rails, mirror stems, or bicycle bars.
Shop the RAM Mounts Torque™ Small Rail Base at Custom Elements with fast shipping across India. Complete your bicycle or compact mounting setup:
- Browse all RAM Mounts and accessories
- Shop action cameras for unique mounting angles
- Explore touchscreen-compatible gloves for device control
The Torque Small Rail Base expands mounting possibilities to bicycle handlebars and small motorcycle mounting points where standard handlebar clamps simply won’t fit.



















































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