Fastrax 1/2 x 3/4 x 4mm Rubber Shielded Losi Differential Bearing FTBB06R

Overview

The Fastrax 1/2 X 3/4 X 4mm Rubber Shielded Losi Diff Bearing FTBB06R is an essential upgrade component for RC enthusiasts looking to maintain peak performance in their Losi differential systems. Whether you're a competitive racer fine-tuning your RC car UK setup or a weekend basher keeping your vehicle in top condition, this precision bearing delivers the reliability and durability required for demanding off-road RC driving. Fastrax has engineered this bearing with rubber shielding to protect against dirt, dust and moisture ingress, ensuring smooth operation even in challenging terrain.

This bearing is specifically designed as a differential bearing for Losi RC vehicles, making it an ideal replacement or upgrade part for maintaining your differential assembly. The compact 1/2 x 3/4 x 4mm dimensions ensure perfect fitment in Losi differentials, whilst the rubber shielded construction provides superior protection compared to unsealed alternatives. If you're serious about keeping your ready to run RC or competition-grade RC buggy, monster truck, or crawler performing at its best, quality bearings like this one are fundamental to smooth drivetrain operation and longevity.

Available in stock at RC Model Shop, this Fastrax bearing represents genuine OEM quality at a competitive price point. Perfect for spare parts inventory, maintenance schedules, or when you need to replace worn bearings in your Losi RC vehicle, the FTBB06R is a trusted component used by RC enthusiasts across the UK and beyond.

Key Features

• Rubber Shielded Design — The rubber shields on both sides of this bearing create a protective barrier against dirt, sand, water and other contaminants that can damage internal races and rolling elements. This shielding is particularly important for off-road RC driving where exposure to harsh conditions is inevitable, extending bearing lifespan significantly compared to open bearings.
• Losi Differential Compatibility — Engineered specifically for Losi differential systems, this bearing ensures perfect fitment and performance without modification. Losi vehicles are popular throughout the UK RC community, from entry-level crawlers to high-performance buggies, and this bearing supports all compatible models in that range.
• Precision Dimensions — The 1/2 x 3/4 x 4mm specification is a standard size for Losi differentials, delivering the exact fit required for smooth rotation and optimal power transmission through your RC drivetrain. Precision manufacturing ensures concentricity and roundness for consistent performance.
• Genuine Fastrax Quality — Fastrax is a recognised manufacturer of quality RC upgrade parts and spares, and this bearing reflects their commitment to performance and reliability. The bearing is manufactured to tight tolerances to ensure minimal runout and maximum efficiency.
• Affordable Replacement Part — At £2.85 ex VAT, this bearing offers exceptional value for money, making it easy to keep spare bearings on hand for maintenance or emergency replacement during your RC driving season.

Technical Performance

This precision bearing delivers consistent rotational performance essential for smooth differential operation in your Losi RC vehicle. The 1/2 x 3/4 x 4mm dimensions represent a standard metric bearing size, with the inner race diameter of 1/2 inch (approximately 12.7mm), outer race diameter of 3/4 inch (approximately 19.05mm), and a width of 4mm. The rubber shields provide a sealed or semi-sealed bearing environment, protecting the internal rolling elements and races from contamination whilst maintaining smooth operation. The bearing's construction utilises precision steel races and rolling elements, engineered to withstand the rotational speeds and load forces experienced in differential systems of RC buggies, trucks and crawlers. Whether you're running a beginner-friendly ready to run RC or a high-performance competition-grade vehicle, this bearing will support consistent differential action and power delivery. The compact 4mm width makes this bearing suitable for space-constrained differential housings common in Losi designs, whilst the rubber shielding provides passive protection without the increased friction sometimes associated with full sealing.

What's in the Box

• 1 x Fastrax 1/2 X 3/4 X 4mm Rubber Shielded Losi Diff Bearing FTBB06R

Frequently Asked Questions

• Is this bearing suitable for all Losi RC vehicles? — This bearing is designed for Losi differential systems that require 1/2 x 3/4 x 4mm bearings. Most Losi crawlers, buggies and trucks use compatible differential bearing sizes, but we recommend verifying your specific model's parts diagram to confirm compatibility before purchase. The bearing works with Element Enduro, Team Losi and other Losi-compatible RC vehicles that utilise this bearing specification.
• What is the advantage of rubber shielding? — Rubber shields provide protection against dirt, sand and moisture ingress into the bearing whilst allowing some ventilation, making them ideal for off-road RC use. Unlike fully sealed or shielded bearings that may trap moisture, rubber shields offer a balance between protection and performance. For UK RC drivers who frequently encounter wet conditions, muddy terrain and dusty environments, rubber shielding provides cost-effective protection without sacrificing rotational smoothness.
• When should I replace my differential bearings? — Inspect your bearings regularly for signs of wear, grinding sounds, or rough rotation. If you notice play in the differential, grinding noises during operation, or if the bearing feels rough when spun by hand, replacement is recommended. For competitive RC racing, many drivers replace bearings every season or after major events. For casual weekend bashing, replacement every 2-3 seasons or as needed is typical.
• Can I use this bearing in other RC vehicles besides Losi? — Whilst this bearing is optimised for Losi differentials, the 1/2 x 3/4 x 4mm size may be compatible with other brands that use standard metric bearing dimensions. However, we recommend using Losi-spec bearings for Losi vehicles and checking compatibility documentation before substituting with other brands to ensure proper fit and performance.
• Is this suitable for beginners? — Yes, this is an excellent spare bearing for beginners maintaining their ready to run RC vehicles. Bearing replacement is one of the most straightforward RC maintenance tasks, requiring only basic tools and minimal mechanical skill. Many ready to run RC vehicles come with multiple bearings, so having spares on hand is prudent maintenance practice for any RC enthusiast.
• What is the difference between this bearing and open or sealed alternatives? — Rubber shielded bearings like the FTBB06R offer a middle ground between fully open bearings (which offer maximum speed but minimal protection) and fully sealed bearings (which offer maximum protection but may create drag). Rubber shields protect against contamination whilst allowing the bearing to breathe and maintain optimal rotational characteristics, making them ideal for most off-road RC applications including RC buggies, trucks and crawlers used in UK conditions.

Why Buy from RC Model Shop?

RC Model Shop is a trusted UK RC retailer and authorised dealer for all the brands we stock, including Traxxas, ARRMA, Losi, FTX, Hobbywing, Spektrum and more. Based in Walsall, we have a physical store where customers are welcome to come in, view products and purchase in store. Whether you are a seasoned competitor, a weekend basher, or just discovering the world of RC for the first time, our team of experienced RC enthusiasts is here to help you find the perfect setup and provide ongoing support. Order the Fastrax 1/2 X 3/4 X 4mm Rubber Shielded Losi Diff Bearing FTBB06R today with confidence, knowing you are buying from an authorised retailer with genuine products, expert knowledge and a commitment to customer satisfaction. Shop online or visit us in Walsall — we look forward to helping you get the most out of your RC experience.