The Moza R5 clamp attaches to your desk in about five minutes with no tools
The Moza R5 desk clamp is the mounting bracket that holds your racing wheel to your desk surface. It comes in the box with your wheel, and installation means tightening two bolts by hand — one on top of the clamp, one underneath — until the clamp grips your desk firmly enough that the wheel does not shift during use.
The clamp works on desks between 0.6 and 2.4 inches thick. If your desk is thinner than 0.6 inches (roughly the thickness of a standard wooden ruler), the clamp will not grip it. If your desk is thicker than 2.4 inches, you will need a different mounting solution, such as a wheel stand or a bolt-down rig.
Before you start, check that your desk edge is clear of cables, power strips, or anything else that might get pinched when you tighten the clamp. You will also want to position your wheel where you plan to use it, because moving the clamp after it is clamped down requires loosening both bolts again.
Key Takeaways
- The Moza R5 clamp grips desks between 0.6 and 2.4 inches thick using hand-tightened bolts with no additional tools required.
- Position your wheel before clamping, because moving it later means loosening and re-tightening both bolts.
- The top bolt tightens the clamp face against your desk; the bottom bolt locks the clamp body in place.
- Tighten by hand until the clamp is snug, then use the included wrench or a 10mm wrench for the final quarter-turn if needed for extra security.
Positioning the clamp on your desk
Place the clamp on the edge of your desk where you want the wheel to sit. The clamp should hang off the edge so that the wheel hangs freely in front of you — not resting on the desk surface itself. Most people position the clamp so the wheel is roughly at elbow height when they are seated.
Make sure the desk edge where the clamp will grip is clean and free of dust or debris. If your desk has a rough or splintered edge, sand it lightly or wipe it down first. A smooth surface helps the clamp grip more evenly and reduces the chance of the clamp slipping during use.
Slide the clamp so that the clamping surfaces (the two metal faces that will squeeze your desk) are parallel to the desk edge. If the clamp is at an angle, it will not grip evenly and may slip.
Tightening the top bolt
The top bolt is the one you see on the upper side of the clamp. This bolt pulls the top clamping face down against your desk. Turn this bolt clockwise by hand until you feel resistance — do not force it, but tighten it firmly so that the clamp face is pressing against the desk surface.
As you tighten the top bolt, watch the clamp to make sure it is not tilting or sliding. If the clamp shifts, loosen the bolt, reposition the clamp so it is square to the desk edge, and tighten again.
You do not need to use a wrench for the top bolt unless you want extra security. Hand-tight is usually sufficient for most users. If you do use a wrench, a 10mm wrench fits the bolt head — turn it only a quarter-turn past hand-tight to avoid over-tightening and damaging the clamp.
Tightening the bottom bolt
The bottom bolt is underneath the clamp, where it meets the underside of your desk. This bolt locks the clamp body in place so it cannot rotate or shift sideways. Reach underneath your desk and turn this bolt clockwise by hand until it is snug against the desk.
The bottom bolt is harder to access than the top one, so you may need to lean under your desk or use a small wrench. A 10mm wrench works here as well. Tighten until the clamp feels solid and does not rock or move when you push on it gently.
If you cannot reach the bottom bolt comfortably by hand, a 10mm wrench or socket wrench makes the job easier. Tighten it firmly but not so hard that you strip the bolt or crack the clamp.
Testing the clamp before you race
Once both bolts are tight, grab the wheel and try to move it side to side, up and down, and front to back. The wheel should not shift at all. If it moves, loosen both bolts slightly, reposition the clamp, and tighten again.
Sit in your racing position and make sure the wheel is at a comfortable height and distance from your body. If the position is wrong, you will need to loosen both bolts, move the clamp, and tighten again — so get this right before you start racing.
Check that no cables or objects are pinched between the clamp and your desk. Pinched cables can fray or short out, and pinched objects can damage your desk or the clamp itself.
Removing or moving the clamp later
To remove the clamp or move it to a different position, loosen both bolts in reverse — turn them counterclockwise by hand until the clamp is loose enough to slide off your desk. Start with the top bolt, then the bottom bolt, so the clamp does not fall suddenly.
If the bolts are very tight and you cannot loosen them by hand, use a 10mm wrench to turn them counterclockwise. Do not force the wrench — if a bolt will not budge, it may be over-tightened. Turn it gently and let it loosen gradually.
Once the clamp is off, check the clamping surfaces for any dents, cracks, or debris. If the surfaces are damaged, the clamp may not grip evenly next time. Clean the surfaces with a dry cloth before re-installing.
Troubleshooting common clamp problems
If the clamp slips or moves during use, the bolts are not tight enough. Loosen the top bolt, reposition the clamp so it is square to the desk edge, and tighten the top bolt firmly. Then tighten the bottom bolt. Test again by pushing on the wheel.
If the clamp is tight but the wheel still moves, your desk may be too thin or too thick for the clamp. Measure your desk thickness at the edge where the clamp grips. If it is less than 0.6 inches or more than 2.4 inches, the clamp cannot grip it securely, and you will need a different mounting solution.
If the bolts are hard to turn or feel stuck, do not force them. The bolt threads may be cross-threaded or damaged. Loosen the bolt slowly and carefully. If it will not budge, contact Moza support — forcing a stuck bolt can strip the threads and make the clamp unusable.
Frequently Asked Questions
Do I need any tools to install the Moza R5 clamp?
No. Both bolts can be tightened by hand. A 10mm wrench is optional and useful only if you want extra security or if your hands are too large to grip the bolts comfortably. The clamp comes with a small wrench in the box, but you do not need it for basic installation.
What desk thickness does the Moza R5 clamp work on?
The clamp grips desks between 0.6 and 2.4 inches thick. Measure your desk at the edge where the clamp will sit. If your desk is thinner or thicker, the clamp will not grip securely, and you should use a wheel stand or bolt-down rig instead.
Can I move the clamp to a different desk later?
Yes. Loosen both bolts by turning them counterclockwise, slide the clamp off, and install it on the new desk the same way. Make sure the new desk is within the thickness range and that the edge is clean before you clamp down.
How tight should I make the bolts?
Tighten by hand until the clamp is snug and the wheel does not move when you push on it. You should not need to use a wrench unless you want extra security. If you do use a wrench, turn it only a quarter-turn past hand-tight — over-tightening can damage the clamp or strip the bolt threads.
What should I do if the clamp keeps slipping during use?
Loosen both bolts, make sure the clamp is positioned square to the desk edge, and tighten both bolts firmly again. If the clamp still slips after that, your desk may be too thin, too thick, or too smooth for the clamp to grip. Try positioning the clamp on a rougher part of the desk edge, or measure your desk thickness to confirm it is within the 0.6 to 2.4 inch range.