Slide Labs High Quality Premium Upgrade Rubber Shielded RC Ball Bearings 940_4mm (4x9x4mm) Replacement for R31M137 (2-Pack)

Slide Labs High Quality Premium Upgrade Rubber Shielded RC Ball Bearings 940_4mm (4x9x4mm) Replacement for R31M137 (2-Pack) (SKU: SL040904) by Fast Eddy.

Slide Labs High Quality Premium Upgrade Rubber Shielded RC Ball Bearings 940_4mm (4x9x4mm) Replacement for R31M137 (2-Pack)

These bearings can be used as replacement to Shibata R31M137. For the GRK-5r slide rack.

Keep your RC car running smoothly with Slide Labs Bearings, featuring genuine Fast Eddy Bearings in a convenient 2-piece package.

These metal-shielded RC bearings are an excellent choice for RC drift cars, touring cars, crawlers, and other RC applications where smooth rotation, durability, and reliable performance are important. Slide Labs packages these bearings in convenient sets of two, making it easy to replace individual bearings or keep spares on hand for your next RC build or maintenance session.

Metal Shielded Bearing Benefits

Metal-shielded bearings offer several advantages for many RC applications compared with rubber-sealed bearings:

• Low rolling resistance – Metal shields can provide very smooth rotation with minimal drag.

• Smooth, free-spinning performance – Ideal for applications where smooth bearing movement is important.

• Excellent durability – Metal shields are designed to withstand regular use and provide long-lasting performance.

• Great for high-speed applications – Their low-friction design makes them well suited for drivetrain and other rotating components.

• Easy to maintain – Metal-shielded bearings can be a great choice for clean, controlled RC environments where maximum sealing isn't required.

• Ideal for RC drift – A smooth-spinning bearing can help reduce unnecessary resistance throughout your chassis and drivetrain.

While rubber-sealed bearings can provide better protection against water, dirt, and other contaminants, metal-shielded bearings are an excellent option when low friction and smooth rotation are the priority.

Rubber Shielded Bearing Benefits

• Superior sealing and protection – Rubber shields create a tight barrier that keeps water, dirt, sand, and debris out of the bearing races, making them ideal for outdoor RC environments and wet conditions.
• Enhanced durability in harsh conditions – Perfect for RC cars used on dusty tracks, muddy terrain, or near water. Rubber seals maintain bearing integrity longer when exposed to contaminants.
• Longer service life – The protective rubber shield reduces premature wear from environmental exposure, meaning fewer bearing replacements and lower maintenance costs over time.
• Lower maintenance requirements – Less frequent cleaning and re-lubrication needed compared to metal-shielded bearings, saving you time between races and driving sessions.
• All-condition reliability – Whether you're running wet grass, sandy beaches, or dusty tracks, rubber-shielded bearings keep performing without compromising your RC car's handling.
• Ideal for outdoor and crawling – Excellent choice for rock crawlers, trail trucks, and any RC application where environmental protection takes priority over absolute minimum friction.

Choose rubber-shielded bearings when your RC car faces real-world conditions and you want maximum protection without sacrificing performance.

Genuine Fast Eddy Bearings

The bearings included in this Slide Labs package are Fast Eddy Bearings. Fast Eddy is well known within the RC hobby for producing replacement bearings for a wide range of RC and is not produced by Slide Labs.