- Product Type: Belleville Disc Spring replacement set for HD Servo Saver
- Compatibility: Losi 1/8 LMT 2.0 4X4 Solid Axle Monster Truck RTR platform
- Compatible Models: C-LOS04028T1 Losi 1/8 LMT 2.0 Grave Digger, C-LOS04028T2 Losi 1/8 LMT 2.0 SonUva Digger
- Spring Type: Belleville Disc Spring (conical spring washer design)
- Spring Rate Specification: Soft - 57 lb rate
- Spring Dimensions: 10.2mm outer diameter x 20mm inner diameter x 0.6mm thickness
- Quantity per Pack: 12 individual Belleville Disc Springs
- Material: Hardened steel
- Design Feature: Two-step servo saver design keeps servo saver stiffer around centre whilst maintaining proper servo saver function
- Tuning Capability: Tunable spring rates using combinations of Belleville Disc Springs
- Part Number: Z-LOS-2071
- Manufacturer: Losi (Horizon Hobby)
Overview
The Losi Bellville Disc Spring, HD Servo Saver, Soft (12): LMT 2.0 is an essential replacement and upgrade component for your Losi LMT 2.0 1/8 scale monster truck. This soft disc spring set provides tunable spring rates that allow you to customise your RC model's handling characteristics precisely. Whether you're a serious RC car enthusiast in the UK or a weekend basher looking to optimise your monster truck's performance, these Belleville Disc Springs offer the flexibility to dial in your servo saver feel and responsiveness exactly how you want it.
Servo savers are critical components in any RC truck, protecting your servo from damage caused by impact and hard landing loads whilst maintaining steering control. The Losi HD Servo Saver system takes this protection a step further with its innovative two-step design and Belleville spring configuration, giving you unprecedented control over your truck's handling balance. This soft spring variant is ideal if you're looking for a more compliant setup or want to experiment with different combinations of spring rates for optimal tuning.
Built with the same precision engineering you'd expect from Losi, one of the most respected brands in RC hobby worldwide, these Belleville Disc Springs are manufactured to exacting standards. The soft 57 lb rate springs in this pack are compatible with the Losi LMT 2.0 platform, including both the Grave Digger and SonUva Digger RTR variants. If you're running a high-performance RC monster truck in the UK and want reliable, genuine Losi parts that give you tuning options, this is an excellent choice.
Key Features
- 57 lb Spring Rate — These soft Belleville Disc Springs offer a 57 lb rate, providing a more compliant and forgiving feel compared to firmer options, making them ideal for off-road bashing and terrain absorption.
- Tunable Spring Configuration — The Belleville Design allows you to experiment with different combinations of springs to achieve custom spring rates tailored to your driving style and track conditions, giving you professional-level tuning capability in your RC car setup.
- HD Servo Saver Compatibility — These springs work as part of the HD Servo Saver system, which features a two-step design that keeps the servo saver stiffer around the centre whilst maintaining proper servo saver function under all driving conditions.
- Pack of 12 Springs — Each package contains 12 individual Belleville Disc Springs, giving you plenty of spares and enough to experiment with different configurations without worrying about running out.
- Genuine Losi Component — As an official Losi spare part, you're guaranteed authentic manufacturing quality and perfect fitment with your LMT 2.0 chassis, ensuring reliable performance and durability.
Technical Performance
The Belleville Disc Spring represents a clever engineering solution for RC servo saver tuning. Each spring measures 10.2mm x 20mm x 0.6mm, engineered to precise tolerances for consistent performance. The soft specification with its 57 lb rate makes these springs slightly more forgiving than medium or firm variants, allowing greater vertical compliance whilst still providing servo protection. This makes them particularly suitable for RC enthusiasts running on rough terrain, rocky tracks, or who prefer a more suspension-like feel from their servo saver system. The Belleville design—a conical spring washer—distributes load more evenly than traditional springs and provides the advantage of allowing spring rate stacking, meaning you can layer multiple springs together to achieve intermediate rates between the soft and firm options provided in the full HD Servo Saver system. This level of tunability is typically found only on high-end competition RC vehicles, but Losi has made it accessible to all LMT 2.0 owners, whether you're a casual bashers or serious competitors. The springs are manufactured from hardened steel to withstand repeated compression cycles without permanent deformation, ensuring consistent performance throughout the lifespan of your RC model.
What's in the Box
- 12x Belleville Disc Springs, Soft (57 lb rate)
- Dimensions: 10.2mm x 20mm x 0.6mm
Frequently Asked Questions
- What is a servo saver and why do I need one on my RC monster truck? — A servo saver is a mechanical component that protects your servo from damage when your RC truck lands hard, hits obstacles, or experiences sudden steering loads. It works by allowing slight spring flex before transmitting full force to the servo, essentially acting as a shock absorber for your steering system. Without a servo saver, hard impacts can strip servo gears or damage the servo internally, resulting in expensive repairs or replacement.
- What's the difference between soft, medium and firm Belleville Disc Springs? — The spring rate determines how much force is needed to compress the spring. Soft springs (57 lb rate) compress more easily and provide a cushioned, forgiving feel; medium springs offer a balanced middle ground; firm springs require more force and provide maximum servo protection at the cost of reduced compliance. Your choice depends on your driving style, terrain, and how much servo protection versus handling feel you prefer.
- Can I mix different spring rates together? — Yes, that's the entire purpose of the Belleville design system. By stacking different combinations of soft, medium, and firm springs, you can achieve virtually any spring rate between the soft and firm extremes. This allows infinite tuning possibilities to dial in your RC car's handling to perfection.
- Which Losi models are these compatible with? — These Belleville Disc Springs are specifically designed for the Losi LMT 2.0 platform, including the Losi 1/8 LMT 2.0 Grave Digger 4X4 Solid Axle Monster Truck RTR and the Losi 1/8 LMT 2.0 SonUva Digger 4X4 Solid Axle Monster Truck RTR. Always verify compatibility before purchasing replacement parts for your RC model.
- Are these genuine Losi parts or aftermarket? — These are genuine OEM Losi parts, manufactured to the brand's specifications and quality standards. Choosing genuine parts ensures perfect fitment, consistent performance, and the reliability Losi is known for throughout the RC hobby world.
- How often should I replace my servo saver springs? — Belleville springs are durable and don't typically wear out from normal use. However, if you notice your servo saver feeling spongy or unresponsive, or if springs become visibly bent or deformed, it's time to replace them. Always carry spares at the track or field for quick repairs.
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 LOS Bellville Disc Spring, HD Servo Saver, Soft (12): LMT 2.0 Z-LOS-2071 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.
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