- Brand: Losi
- Model Number: Z-LOS-2298
- EAN: 0660132629359
- Spare Part Type: Chassis Spares
- Compatible Models: Losi 1/4 Promoto-SM FXR Supermoto Motorcycle RTR Basic and Losi 1/4 Promoto-SM FXR Supermoto Motorcycle RTR with Battery and Charger
- Compatible Model Numbers: C-LOS-2272 and C-LOS-2310
- Scale: 1/4
- Lean Bar Material: Rubber
- Lean Bar Support: 2 x Ball Bearings
- Ball Bearing Type: 6 x 12 x 4mm Rubber Sealed Ball Bearings (4 units included)
- Construction: Injection moulded plastic with metal hardware
- Included Components: Lean Bar Left, Lean Bar Right, Lean Bar Spring Left, Lean Bar Spring Right, 2 x Lean Bar Wheel SM, 2 x 4mm Washers, 2 x Spring Caps, 2 x Upper Limit Stop A, 2 x Upper Limit Stop B, 2 x Upper Limit Stop C, 2 x Bump Stops, 2 x 4mm x 6mm Flanged Bushings, 2 x Lean Bar Bushings, 2 x M4 x 2.5mm Screw Pins, 2 x Limit Screws, 2 x M4 x 25mm Flat Head Screw, 2 x M3 x 10mm Button Head Screw, 2 x M4 x 24mm Button Head Screw
- Fastener Types: M3 x 10mm Button Head Screw, M4 x 25mm Flat Head Screw, M4 x 24mm Button Head Screw, M4 x 2.5mm Screw Pins
- Features: Raised lean bar design for increased lean angle, Rubber construction for reduced noise, Dual ball bearing support for smooth articulation
Overview
The Losi Lean Bar Set with Hardware is a premium suspension upgrade component designed specifically for the Losi 1/4 Promoto-SM and Promoto-MX supermoto motorcycles. This complete lean bar assembly is an essential spare part for riders who want to maintain or upgrade their RC motorcycle's suspension performance, or for those looking to rebuild their model after wear and tear. Whether you're a dedicated RC enthusiast in the UK enjoying competitive racing or weekend bashing with your RC bike, this genuine Losi spare part ensures your Promoto maintains the handling characteristics you expect from a quality supermoto platform.
Built with precision engineering, the Losi Lean Bar Set combines injection-moulded plastic components with metal hardware and ball bearings to deliver reliable suspension performance. The set features a raised lean bar design manufactured from rubber, which not only allows for increased lean angle during cornering but also reduces operating noise for a quieter ride. This thoughtful engineering makes the lean bar system one of the most important components for achieving responsive handling on your Promoto motorcycle, whether you're exploring technical courses or competing at your local RC racing club.
This is a complete system replacement, meaning you get everything needed to install a fresh lean bar assembly on your Promoto-SM or Promoto-MX. For RC motorcycle enthusiasts seeking quality replacement parts from an authorised UK retailer, this Losi spare part represents excellent value and genuine OEM quality you can rely on.
Key Features
- Raised Lean Bar Design — The lean bar has been engineered with a raised profile to allow greater lean angle during high-speed cornering manoeuvres, giving your Promoto-SM or Promoto-MX the agility needed for responsive riding dynamics on any RC course.
- Rubber Construction with Reduced Noise — The lean bar is manufactured from rubber material that significantly dampens vibration and noise during operation, creating a more refined and quieter riding experience compared to harder plastic alternatives.
- Dual Ball Bearing Support — The lean bar is supported by two precision ball bearings that ensure smooth articulation and longevity, minimising friction and maintaining consistent suspension feel over extended use and multiple riding sessions.
- Complete Hardware Package — This set includes every component needed for installation, from screw pins and button head screws to flanged bushings and limit stops, eliminating the need to source parts from multiple suppliers.
- Includes Matching Springs — Factory-matched left and right lean bar springs are included, ensuring balanced suspension response and predictable handling characteristics straight out of the box.
- Multiple Limit Stop Options — The kit provides three different upper limit stop configurations, allowing you to fine-tune suspension geometry to match your riding style, track conditions, and personal handling preferences.
- Sealed Ball Bearings — The four included 6 x 12 x 4mm rubber sealed ball bearings provide protection against dirt and moisture, extending component life and maintaining smooth operation in varying weather conditions.
- Universal Fit for Two Models — This suspension assembly is compatible with both the Losi Promoto-SM FXR Supermoto Motorcycle and the Promoto-MX, making it a versatile spare part for multi-model Losi enthusiasts.
Technical Performance
The Losi Lean Bar Set represents sophisticated suspension engineering tailored specifically for 1/4 scale supermoto motorcycle dynamics. The assembly combines injection-moulded plastic structural components with precision metal hardware, creating a lightweight yet rigid suspension system that responds immediately to control inputs. The rubber lean bar material serves dual purposes: it provides the necessary compliance for smooth articulation whilst simultaneously absorbing vibration that would otherwise be transmitted through the chassis. The dual ball bearing arrangement distributes loads evenly and reduces friction across the entire range of lean angles, from neutral riding position through aggressive cornering. With the raised lean bar profile, the Promoto-SM and Promoto-MX achieve greater maximum lean angle before the chassis contacts the ground, translating to faster corner speeds and more dynamic handling characteristics. The inclusion of three different upper limit stop configurations (Upper Limit Stop A, B, and C) allows riders to precisely control lean bar travel and adjust the suspension's compliance curve to suit different track surfaces and riding techniques. The sealed ball bearings protect against contamination during outdoor riding, whilst the spring-loaded design maintains consistent pre-load across varying riding conditions. This is professional-grade OEM Losi engineering designed to perform reliably lap after lap, whether in competitive racing environments or recreational riding situations.
What's in the Box
- Lean Bar Left (rubber construction)
- Lean Bar Right (rubber construction)
- Lean Bar Spring Left
- Lean Bar Spring Right
- 2 x Lean Bar Wheel SM
- 4 x 6 x 12 x 4mm Rubber Sealed Ball Bearings
- 2 x 4mm Washers
- 2 x Spring Caps
- 2 x Upper Limit Stop A
- 2 x Upper Limit Stop B
- 2 x Upper Limit Stop C
- 2 x Bump Stops
- 2 x 4mm x 6mm Flanged Bushings
- 2 x Lean Bar Bushings
- 2 x M4 x 2.5mm Screw Pins
- 2 x Limit Screws
- 2 x M4 x 25mm Flat Head Screw
- 2 x M3 x 10mm Button Head Screw
- 2 x M4 x 24mm Button Head Screw
Frequently Asked Questions
- What RC motorcycles is this lean bar set compatible with? — This Losi Lean Bar Set is designed as a complete replacement suspension assembly for the Losi 1/4 Promoto-SM FXR Supermoto Motorcycle and the Losi Promoto-MX. These are the two officially supported models for this spare part, though both use the same chassis platform with minor variations.
- Is this a complete replacement assembly or just an upgrade component? — This is a complete lean bar set with all necessary hardware included for full installation. It contains both left and right lean bars, springs, bearings, fasteners, and adjustment components, making it a comprehensive system that can be installed directly onto your Promoto chassis.
- Why would I need to replace my lean bar set? — Lean bar assemblies experience wear from regular riding due to constant articulation of the suspension. If your Promoto feels less responsive, has notchy steering, or shows visible wear on the lean bar or bearings, a fresh assembly will restore performance and handling precision to like-new condition.
- What is the benefit of the raised lean bar design? — The raised profile allows your Promoto-SM or Promoto-MX to achieve greater lean angles during cornering before the chassis makes contact with the track surface. This means faster corner speeds, more aggressive riding dynamics, and better performance on technical courses without the chassis scrubbing prematurely.
- How do the three different upper limit stops affect handling? — The three Upper Limit Stop configurations allow you to adjust how much the lean bar can articulate before reaching its mechanical limit. Different stops create different suspension compliance curves: changing these allows you to tune the bike's response to your preferred riding style, track surface texture, and speed preferences.
- Are the ball bearings sealed against dirt and water? — Yes, this set includes four 6 x 12 x 4mm rubber sealed ball bearings that provide protection against moisture and contamination. The rubber seals extend bearing life significantly, particularly if you ride outdoors or in variable weather conditions typical of UK RC racing venues.
- Can I install this myself, or do I need professional help? — The Losi Lean Bar Set is designed for owner installation using standard RC hobby tools. However, suspension assembly does require mechanical aptitude and careful attention to torque specifications and assembly sequence. If you're inexperienced with RC motorcycle builds, we recommend consulting the official Losi manual or seeking assistance from experienced RC technicians.
- How does the rubber lean bar reduce noise? — The rubber material absorbs impact vibration and flexes slightly during suspension articulation, dampening the hard plastic-on-plastic sounds that would otherwise occur. This creates a noticeably quieter riding experience whilst also reducing the harshness felt through the handlebars and improving overall ride quality.
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 Losi Lean Bar Set with Hardware: PM-SM/MX Z-LOS-2298 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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