RAM Torque Medium Rail Base - C Size (3/4"-1")

A heavy-duty C-size handlebar and rail base that clamps directly onto tubing 3/4" to 1" in diameter -- the starting point for mounting a phone, GPS, or tablet on a motorcycle, ATV, or any vehicle with a round handlebar or rail in that range.

Why this matters on two wheels

A motorcycle handlebar delivers constant vibration and, on rough roads, real shock loads straight into anything bolted to it. RAM's Torque base is machined from marine-grade aluminum and clamps the rail with nylon-insert lock nuts specifically so it does not work loose from that vibration over time -- a problem cheaper suction-cup or friction mounts often have, but that RAM's clamp-and-lock-nut design is built to avoid. It is also fully exposed to weather every time you ride, so the finish (powder-coated aluminum) and hardware (all included, corrosion-resistant) are chosen for outdoor use, not just indoor dash mounting.

Features

• Handlebar and rail mounting base with a C size 1.5" rubber ball, clamps tubing 3/4" to 1" in diameter
• Includes sizing inserts (.9" and .75" split reducing bushings) so the clamp fits snugly across the full range without marring the bar
• Nylon-insert lock nuts keep the clamp from working loose under continuous engine and road vibration
• Made of powder-coated, marine-grade aluminum for durability and reliability in the most demanding environments
• Backed by a lifetime warranty

How RAM's modular system works

Every RAM mount is built from up to three parts that click together: a base that clamps, bolts, or straps onto the vehicle (a handlebar, a rail, a dash, or a device's own housing); an arm that connects two RAM balls together and can be locked at any angle, so once mounted you can tilt, rotate, and reposition the device freely and then lock it firmly in place by hand; and a cradle or holder that grips the specific device (phone, tablet, GPS unit, camera).

Not every product includes all three parts -- some are just the base, some bundle a cradle, some are a complete kit. Where that is the case, this page says so plainly, so you know exactly what you are getting and what, if anything, you would need to add.

The ball size determines what it can carry

RAM uses five ball sizes, each rated for a different weight and duty class. B Size (part numbers starting RAM-B-...) is RAM's most common size, standard duty -- what RAM recommends for phones, GPS units, and light tablets in normal use. C Size (plain RAM-... part numbers, no letter prefix) is heavy duty -- used for larger tablets, handheld computers, CB radios, and anything mounted somewhere that gets a lot of vibration or shock, exactly the case on a motorcycle, ATV, or UTV. D and E Size are reserved for large monitors and specialist equipment, rarely needed outside those cases.

Rule of thumb: if the mount will live somewhere that is frequently jostled, vibrated, or under constant load -- a motorcycle or off-road vehicle -- RAM recommends stepping up to the larger ball size (C or D) for extra stability, even if a lighter B-Size mount would technically hold the device's weight.

No tools required, on purpose

RAM arms are designed to be tightened by hand only -- there is no official torque spec, because the ball-and-socket joint is meant to be adjustable in the field without a wrench. If hand-tightening does not hold your device firmly, that is usually a sign the ball size is undersized for the device -- sizing up solves it, rather than over-tightening.

Aluminum or composite -- both built for the outdoors

RAM mounts are made from marine-grade aluminum or high-strength composite, depending on the product; both carry a lifetime warranty and similar weight ratings. Aluminum's powder-coat finish handles rough vibration and shock slightly better; composite has no paint to chip and is often preferred in high-corrosion or salt-air environments. Neither choice is worse -- it is a trade-off between finish and environment.

This is a base -- you still need an arm and a holder

The RAM-408-75-1U is only the clamp-on base with its C-size ball -- the equivalent of "the base" in RAM's three-part system. To finish a working mount you still need a C-size double socket arm (available in short, medium, and long lengths) and a cradle or holder sized for your phone, GPS, or tablet. Not sure which arm and holder to pair it with? Contact RoboService and we will help you specify the complete kit for your device.

Specifications

Frequently asked questions

Does this come with an arm and a phone or GPS holder?
No. This is the base only -- a C-size clamp with a RAM ball. You need to add a C-size double socket arm and a holder sized for your device to complete the mount. Contact RoboService if you want help specifying the full kit.

What handlebar or rail sizes does it fit?
Tubing from 3/4" to 1" (19-25.4 mm) in diameter. The included split reducing bushings take up the slack at the smaller end of that range for a tight, non-marring fit.

What is the difference between this and the RAM-408-112-15U?
Only the clamp range. This base (RAM-408-75-1U) fits 3/4"-1" tubing; the RAM-408-112-15U fits the larger 1 1/8"-1 1/2" range. Both use the same C-size 1.5" ball, so the same arms and holders work with either.

Will the clamp scratch or damage my handlebar?
No. The included sizing inserts sit between the aluminum clamp and the bar, and the rubber adhesive strip supplied with the kit adds extra protection and grip.

Do I need tools to adjust the mount once everything is assembled?
No. Once the arm and holder are added, the ball-and-socket joints are designed to be loosened and re-locked by hand, so you can reposition the device without a wrench.

Is there a warranty?
Yes, RAM backs this base with a lifetime warranty against manufacturing defects.