LXT Style Rear Upright For H Arm

LXT Style Rear Upright For H Arm

Part No: JCS-0172

Product Overview:
A rare rear upright made specifically for the LXT. It is also compatible with all Losi rear H/A arm configurations used in JRX2 series vehicles. Perfect for restoration projects or period-correct builds. Ideal for for hitting the track. A 2038 Losi part replacement.

Key Features:

• High-quality injection-moulded nylon construction
• Made in the U.K.
• Suitable for any Losi Rear A/H arm upgrades
• Includes the optional holes drilled and used by the team back in the day
• Designed to original geometry
• Direct-fit solution 

What’s Included

• (2) Rear uprights

Ideal For

• Vintage JRX restorations
• Maintaining correct rear suspension geometry

Losi Release History
JRX2
Release Date: 1988
Key Features

• Graphite chassis
• 5-link rear suspension
• Real rubber tyres
• Low rotating mass transmission

Notes
The buggy that started it all for Team Losi. The JRX2 introduced an innovative 5-link rear suspension, setting it apart from competitors at the time.

Unlike the Associated RC10, which featured a stamped aluminium chassis, the JRX2 was supplied with a graphite plate chassis, highlighting Losi’s early focus on performance and lightweight design.

This original platform went on to form the basis for three additional buggy variants and three trucks, establishing the foundation of the Losi racing lineup.

JRX2-Pro
Release Date: 1990
Key Features

• Longer graphite chassis
• H-arm rear suspension
• Long front and rear shocks

Notes
The JRX2-Pro was the direct evolution of the JRX2. It introduced longer front shocks, a design direction that was later reversed in subsequent models.

The original 5-link rear suspension was replaced with a solid H-arm, improving durability and consistency. Additional updates included a revised two-piece battery holder, stronger steering bellcranks, and a move from spoked wheels to solid wheels featuring the Team Losi logo.

JRX2-Pro SE
Release Date: 1992
Key Features

• Molded composite chassis
• Revised shock towers
• Slipper transmission
• Swept front suspension arms

Notes
The JRX2-Pro SE built upon the Pro platform with significant updates. Most notably, it introduced new swept composite front arms, improved shock towers, and a slipper transmission.

Later versions were also supplied with the retrofit XX transmission. The molded composite chassis offered two wheelbase options and should not be confused with the Junior 2 chassis—it is a different composite design with additional rear mounting holes to accommodate the extended wheelbase.

This model also featured revised shock cartridges, further improving suspension performance.

Junior 2
Release Date: 1990

Key Features

• Molded composite chassis
• Plastic shock towers
• Bushings in place of bearings

Notes
The Junior 2 was Team Losi’s first lower-cost buggy kit, designed to make competitive RC racing more accessible.

It introduced Losi’s first molded plastic chassis, replacing the flat graphite plates used in earlier models. Cost savings were achieved through the use of plastic shock towers, bushings instead of full bearings, and simple threaded-rod linkages.