The JSumo JS4320 Aluminum Silicone Wheel Pair is a compact, high-grip wheel set made for robot builds that need strong traction and a secure shaft fit. With a machined aluminum hub and soft silicone tire, this wheel pair is a solid choice for non-magnetic sumo robots, lightweight combat robots, and other custom drive systems where grip and control matter.
This version comes with a 4 mm center hole and an M4 tapped setscrew, making it easier to lock the wheel onto compatible motor shafts. If you need a wheel that stays light but still gives a strong contact patch, the JS4320 is a practical option for both new builds and upgrades.
Why builders choose this wheel pair
- Strong traction: Soft silicone tire helps improve grip during pushing, turning, and quick starts.
- Compact but capable: Good size for smaller competition and custom robot platforms.
- Aluminum hub: More solid and durable than basic plastic wheel types.
- Secure shaft lock: M4 tapped setscrew helps keep the wheel firmly in place.
- Built for robot use: A good fit for sumo and lightweight combat builds.
What you can build
This wheel pair works well for non-magnetic sumo robots, lightweight combat robots, and compact two-wheel drive robots that need reliable floor grip.
It is also useful for custom chassis projects, small drive platforms, and robot upgrades where you want a balanced mix of low weight and good traction.
Starter bundles
- Browse JSumo robot parts for matching mechanical and drive parts.
- DC gear motors for compact robot movement.
- Sumo robot chassis parts for competition-ready builds.
Recommended add-ons
- Motor brackets for easier wheel mounting.
- Shaft and drive hardware for custom setups.
- Robot chassis parts for fresh builds and upgrades.
- Hex tools for assembly and maintenance.
Technical specifications
| Product name | JS4320 Aluminum Silicone Wheel Pair |
|---|---|
| Model | JS4320 |
| Product code | JS20786 |
| Wheel diameter | 43 mm |
| Wheel width | 20 mm |
| Weight | 26 g each |
| Silicone hardness | 20 Shore |
| Center hole diameter | 4 mm |
| Shaft locking | M4 tapped setscrew |
| Suggested use | Non-magnetic sumo robots, 1 lb to 3 lb combat robots |
Fitment & shaft notes
This version is made with a 4 mm shaft hole. Please check your motor shaft size before ordering to make sure the fit is correct.
JSumo states that the JS4320 model is produced with a 4 mm hole for this version.
What’s in the box
- 2 x wheels
- 2 x M4 setscrews
- 1 x Allen wrench
FAQ
Is this sold as a pair?
Yes. This product includes two wheels in one set.
What shaft size does it fit?
This version has a 4 mm center hole, so it is made for 4 mm shaft setups.
How is the wheel secured to the shaft?
It uses an M4 tapped setscrew to lock the wheel onto the shaft.
What robots is this best for?
It is a good fit for non-magnetic sumo robots, lightweight combat robots, and compact custom drive builds.
Is the tire made for grip?
Yes. The silicone tire is made to give strong traction for robot movement and pushing power.
JS4320 Aluminum - Silicone Wheel Pair (43mm x 20mm) Pair (4mm Hole)
JS4320 Aluminum - Silicone Wheel Pair (43mm x 20mm) Pair (4mm Hole)
Low stock: 1 left
Product Code
SKU:JS20786
Couldn't load pickup availability
