INJORA Brass Internal Counterweights for 1.9/2.2 RC Wheel Rims (2pcs, 63g Each)
INJORA Brass Internal Counterweights for 1.9/2.2 RC Wheel Rims (2pcs, 63g Each)
These INJORA brass internal counterweights add 126 grams of total mass (63g per piece) to your RC car's wheel rims. Designed for 1.9- and 2.2-inch rims with six M3 mounting holes and a removable wheel hex, they help lower the vehicle's center of gravity and improve stability during crawling or trail driving. The drilled and slotted design mimics a brake rotor for a realistic scale appearance.
What Rims Do These Fit?
These counterweights are intended for 1.9-inch or 2.2-inch wheel rims that have six M3 holes in the hex area. Before ordering, confirm that your wheel hex is removable and that the rim's inner diameter is large enough to accommodate these discs (outer diameter 38mm, inner diameter 22.5mm, aperture 13mm). They are commonly used on VP-style rims and many aftermarket wheels.
How Much Weight Do They Add?
Each counterweight weighs 63 grams, so a pair adds 126 grams total. This additional unsprung weight sits inside the rim, lowering the vehicle's center of gravity. Many RC crawler enthusiasts use them to increase tire grip and reduce body roll on uneven terrain.
Scale Brake Rotor Appearance
These counterweights feature a drilled and slotted brake rotor pattern. While they do not provide braking function, the realistic look enhances the visual detail of your rig, making it a popular upgrade for TRX-4 and SCX10 II builds.
Specifications
| Material | Brass |
| Quantity | 2 pieces per pack |
| Weight per piece | 63g |
| Outer diameter | 38mm |
| Inner diameter | 22.5mm |
| Center aperture | 13mm |
| Bolt hole pattern | 6 x M3 |
| Compatible rim sizes | 1.9 inch and 2.2 inch (with removable hex) |
Common Questions
Can I use these on stock TRX-4 or SCX10 wheels?
Only if your stock rims have a removable hex hub and six M3 holes. Many stock wheels have fixed hexes, so these counterweights will not fit. Check your rim's inner space and bolt pattern before purchasing.
Do they require any modification to install?
If your rims are compatible, installation is straightforward: remove the wheel hex, place the counterweight over the axle stub, then reinstall the hex. No drilling or cutting is needed.
Are they just for show or do they help performance?
They add significant weight low in the wheel, which helps lower the center of gravity and improve stability — especially useful for crawling on steep or loose surfaces. The brake rotor look is a bonus.
Package Includes
- 2 x INJORA Brass Internal Counterweight discs