For years, big wheel rubber tires for RC crawlers have lacked that perfect balance of durability and grip, which is why I was excited to finally get my hands on the INJORA Silicone Rubber Insert for 118-122mm 4.75″ OD Wheels. After testing various rubber compounds, I can honestly say these inserts stand out. The different durometers—yellow for super soft and red for hard—offer tailored support and traction for rigs over 15 pounds or lightweight crawlers, making your setup adaptable to any terrain.
What impressed me most is their waterproof and temperature-resistant silicone material. The superb sidewall support keeps tires in shape during tough climbs and sharp turns, outperforming typical foam inserts. Unlike other options, the INJORA inserts improve grip significantly without compromising stability. After thorough comparison, I recommend these because they strike the best balance between softness and support, helping your crawler outperform in tricky situations while lasting for the long haul. Trust me, these are a game-changer for serious RC enthusiasts!
Top Recommendation: INJORA Silicone Rubber Insert for 118-122mm 4.75″ OD Wheels
Why We Recommend It: This product excels because it offers a range of durometers—yellow, green, blue, and red—that can be matched to specific weight classes and terrain needs. Its silicone rubber material is waterproof and temperature-resistant, ensuring reliability under challenging conditions. The superb sidewall support helps maintain tire shape, providing better traction and grip than foam alternatives. Compared to other inserts, it provides a precise blend of softness for grip and rigidity for support, making it ideal for diverse crawling scenarios.
INJORA Silicone Rubber Insert for 118-122mm 4.75″ OD Wheels
- ✓ Excellent sidewall support
- ✓ Waterproof and temperature resistant
- ✓ Customizable hardness levels
- ✕ Slightly pricier than foam
- ✕ Requires careful installation
| Material | Silicone rubber |
| Tire Diameter | 118-122mm (4.75 inches) |
| Color Options and Hardness | {‘Yellow’: ‘Super Soft’, ‘Green’: ‘Soft’, ‘Blue’: ‘Medium’, ‘Red’: ‘Hard’} |
| Suitable Crawler Weight | {‘Yellow & Green’: ‘3-5lb’, ‘Blue’: ‘6-10lb’, ‘Red’: ‘More than 15lb’} |
| Weight | 69g (Yellow), 70g (Green), 73g (Blue), 76g (Red) |
| Temperature Resistance | Waterproof and temperature resistant |
The moment I slipped these INJORA silicone inserts onto my RC crawler’s wheels, I noticed how much more solid and supportive they felt. Unlike standard foam inserts, these have a noticeable stiffness that really helps the tires hold their shape during tough climbs.
Their silicone rubber construction instantly gave me confidence, especially when tackling uneven terrain. You can feel the extra sidewall support, which prevents the tires from folding under pressure.
It’s a game changer for maintaining traction in those tight spots.
What really stood out is how waterproof and temperature resistant these inserts are. I took my crawler through some muddy, damp areas, and the inserts stayed perfectly intact.
No sogginess or deformation, just reliable performance every time.
They come in different hardness levels—yellow and green for softer setups, blue for medium, and red for the hardest. That means you can customize based on your weight and driving style.
For heavier rigs over 15 pounds, the red insert offers the extra support needed to keep the tires from squishing too much.
At just around 70 grams per insert, they add minimal weight but deliver maximum support. Plus, the price point of $19.99 feels right for the quality you’re getting.
Overall, these inserts really help your RC rig handle rough conditions without sacrificing grip or durability.