BATTCAVE

BattCave JOK3R+ Mini Short A-Arms

Developed specifically for the BattCave JOK3R+, our new Short A-Arms form an important part of the revised JOK3R+ front suspension.

The shorter A-Arm design has been developed to help give the JOK3R+ its easier, more forgiving driving characteristics, while retaining the precise and responsive front-end feel expected from the JOK3R platform.

Produced using our revised high-performance material, the new Short A-Arms offer increased strength and improved impact resistance, helping to make the JOK3R+ front end more durable without compromising precision or performance.

Each pair is also supplied with our new Front Steering Rubber Limiters. These act as impact absorbers, helping to dissipate heavy impacts through the front suspension and protect the surrounding components, further improving front-end durability.

Caster and camber geometry is built directly into each A-Arm, allowing racers to quickly change the front-end characteristics of the car and fine-tune the setup for different track conditions and driving styles.

Available Geometries

🦇 2+0 – JKR-3A20-S

🦇 2+1 – JKR-3A21-S

🦇 4+0 – JKR-3A40-S

🦇 4+1 – JKR-3A41-S

🦇 7+0 – JKR-3A70-S

🦇 7+1 – JKR-3A71-S

Key Features

🦇 New Short A-Arm Geometry – developed specifically for the revised JOK3R+ front suspension.

🦇 Easier, More Forgiving Handling – the revised suspension geometry contributes to the more accessible and confidence-inspiring driving characteristics of the JOK3R+.

🦇 Revised High-Performance Material – increased strength and improved impact resistance for greater front-end durability.

🦇 Front Steering Rubber Limiters Included – act as impact absorbers to help dissipate heavy impacts and protect surrounding front-end components.

🦇 Six Geometry Options – choose from 2+0, 2+1, 4+0, 4+1, 7+0 and 7+1 to fine-tune your front-end setup.

🦇 Built-In Geometry – caster and camber settings are incorporated directly into the A-Arms, making setup changes quick and repeatable.

🦇 Precision 3D Printed – designed and manufactured in-house using our proprietary 3D printing methods.

🦇 Sold in Pairs – supplied as one matched pair of Short A-Arms, complete with Front Steering Rubber Limiters.

🦇 JOK3R+ Specific – designed exclusively for the BattCave JOK3R+ Mini competition chassis.

Since the original JOK3R launched in late 2023 and then the 2025 JOK3R-R update, we have continued to develop and refine the platform through countless hours of racing, testing and customer feedback.

JOK3R+ Carbon Surface GRP (CSGRP) 

A premium GRP alternative for the JOK3R+ range, combining our premium GRP core with a distinctive 3K glossy carbon surface finish.

The CSGRP chassis not only retains the familiar characteristics of our proven Black GRP chassis, but the slot-less LiPo-only design also provides a wider flex tuning window for different track conditions and setups. The LiPo-only design also gives the chassis an overall cleaner look too.

What's New with the JOK3R+

New Short A-Arms & Ride Height Shims

New short A-arm design 

Developed to improve driveability and provide another front-end tuning option, together with new ride height shims for adjustment of the front ride height.

*The existing JOK3R-R Long A-Arms remain fully compatible with the JOK3R+.

2mm Long Top Decks - Now Standard

Previously available as an optional tuning part for the JOK3R-R, our 2mm Long Top Deck design is now supplied as standard across all JOK3R+ kits, providing additional flex tuning options straight from the box.

New JOK3R+ V2 Pod Bobbins

Revised rear pod bobbins introduced with the JOK3R+, These new pod bobbins are not only stronger but they are designed to provide uniform preload which is set by the band itself. This allows racers to adjust the pod roll centres without affecting the sideband’s preload.

Revised TPU Front Bumper

The TPU front bumper has been redesigned to accommodate the new Short A-Arm design while remaining fully compatible with the original JOK3R-R Long A-Arms.

Revised Steering Bump Stop

The updated TPU steering protection are now universal fit for both side of the car.

Aqua Response Side Bands

The ever popular Aqua Silicone Response Side Bands are now supplied as standard with the JOK3R+.

Improved Plastics throughout

General improvements to materials and manufacturing process to further increase the durability the car.

Now Available as a Full Kit

For the first time in the history of the JOK3R platform, the JOK3R+ is now available as a full self-build kit, complete with our comprehensive hard copy user manual. *For those who would prefer their car ready-built, a pre-assembled slider option will also be available, subject to availability.

New JOK3R+ Tuning Options Available Separately.

• 2mm T7075 Alloy Pod Plate - significantly increases the pod movement compared with the standard 3mm pod plate, providing greater pod freedom for improved weight transfer and bump handling when cornering at speed.

• Low Roll Centre Pivot Ball - lowers the rear roll center for increased rear grip and traction, allowing additional rear-end find tuning options.

• Fat Side Bands - a new trio of 2.5mm side-band range providing a simplified chassis tuning option. Available in Soft, Medium and Hard, colour coded to match our current Side Band range.

JOK3R+ Global  specification

• Mini Construction Rules compliant

• Fully precision ball-raced

• 5mm Big Bore Kingpins

• High/Low rear axle height selection

• Forward/Backward battery positions

• Fully adjustable front and rear preload and droop

• New Short A-Arms

• New front ride height shims

• 100% compatible with JOK3R-R Long A-Arms

• 2mm Long Top Decks supplied as standard

• New JOK3R+ V2 Pod Bobbins

• Aqua Silicone Side Bands

• Large and small servo posts supplied

• LCG motor mount

• Quick-change front and rear spring design

• Revised universal steering bump stop

• Revised TPU front bumper

• ZED - Zero E-clip Design

Premium Equipment Included as Standard

Every JOK3R+ also includes:

• Black anodised alloy motor plate

• Black alloy spur drive

• Black alloy dog drive

• Hex king pins and spanner

• Black Kimbrough KP114 Servo Saver (25T)

• 3D printed ride-height gauge

• 3D printed parts tray

• Bonus spare-parts bag

Compatibility & Upgrade Path

The JOK3R+ remains firmly part of the existing JOK3R platform rather than replacing it with an entirely new car. Most JOK3R-R parts remain compatible with the JOK3R+, allowing existing racers to continue using their current spares and optional parts while taking advantage of the latest JOK3R+ developments.

What You Need to Run;

• RS-540 type motor

• Speed controller

• Servo

• Battery and charger

• Radio control set

• Body shell

• Wheels and tyres

*Please check your local club or championship regulations for permitted electronics, bodies and tyres.

Resources & Support

The JOK3R+ is supplied with a comprehensive hard-copy user manual covering assembly, setup and adjustment. A digital copy is also available from the Downloads section of our website, allowing you to view the manual on your phone, tablet or computer.

With the vast majority of JOK3R components designed and manufactured by BattCave, we remain committed to full spares support, continued development and future tuning options for the platform.

JOK3R+  The next evolution of the BattCave JOK3R platform.

BattCave JOK3R Mini Rear Axle Bearings, JKR-B01

🦇 Sold as a pack of 2.

BattCave JOK3R Mini Front Axle Bearings, MR84ZZ, JKR-B02

🦇 Sold in a pack of 4.

• 🏁 Lexan Mini Racer Body Shell

  Upgrade your track setup with this high-performance Mini Racer body shell! 🏎️💨

  Key Features & Compatibility:

  • 🎯 Designed To Fit: Kamtec Mini Racer, Battcave Joker, Mardave, TWR, and similar chassis.

  • 📏 Wheelbase: 178mm

  • 🪽 Includes: With wing

  • 🛠️ Material: Clear, durable Lexan Polycarbonate (comes unpainted and uncut so you can create your own custom livery 🎨).

  What’s Included in the Pack? 📦

  • 🖼️ Window Masks (Included for clean painting)

  • 🪟 Window Surrounds

  • 🎁 FREE Sticker Set & Decals! 🤩

  Please Note: ⚠️

  • ❌ Not Suitable For: Standard Kamtec cars like Hot Rods or 1300 stock chassis.
    

  • 🚗 More Options: We have many other Mini body shell styles available in our shop!

Torque(6.0V): 36.0 kg-cm / (499.9 oz/in)
Torque(7.4V): 42.0 kg-cm / (583.3 oz/in)
Torque(8.4V): 50.0 kg-cm / (694.4 oz/in)
Torque(4.8V): 2.5 kg-cm (34.7 oz/in)
Torque(6.0V): 3.0 kg-cm (41.7 oz/in)
Torque(7.4V): 3.2 kg-cm (44.4 oz/in)
Speed: 0.11 sec (4.8V) │ 0.095 sec (6.0V) │
Speed: 0.085 sec (7.4V)
Operating Voltage：4.8 ~ 7.4 DC Volts
Weight: 14.0 g (0.49 oz)
Gear Type：Copper&Alu
Connector wire length: JR 180 mm
Operating Temperature: -10℃~60℃
Working frequency：1520μs / 50hz
Size：22.5 x 12.5 x 24.0 mm ( 0.89 x 0.49 x 0.94 in)

New BattCave 32DP Lightweight Long-Boss Aluminium Pinions... Full Range Now Available!

Designed by BattCave and precisely CNC-machined from high-grade T7075 aluminium, these lightweight long-boss pinions are built for smooth, efficient performance. Finished in sleek black with laser-etched markings for quick identification, and now with a full range of sizes to suit all track types, from tight technical layouts to fast open circuits. 

BattCave JOK3R 32dp Spur Gear, 40, 41, 42, 43T, 44T, 45T, 46T and 48T

🦇 New 40T, 41t, 42t, and 43T options added for those big track layouts!

🦇 Sold Individually. 

🦇 Made from Acetal.

BattCave JOK3R 32dp Spur Gear, 40, 41, 42, 43T, 44T, 45T, 46T and 48T

🦇 New 40T, 41t, 42t, and 43T options added for those big track layouts!

🦇 Sold Individually. 

🦇 Made from Acetal.

BattCave JOK3R 32dp Spur Gear, 40, 41, 42, 43T, 44T, 45T, 46T and 48T

🦇 New 40T, 41t, 42t, and 43T options added for those big track layouts!

🦇 Sold Individually. 

🦇 Made from Acetal.

NEW! BattCave JOK3R MAD Mini Front Bumper JKR-BP02

JKR-BP02 - Standard Kit pre Plus Model

JKR-BP02V2 - For GRP & Carbon Chassis

JKR-BP02V2A - For Alloy Chassis

Specifically designed for the Phat Bodies M.A.D Mini bodyshell, our latest 3D printed TPU low-profile front bumper offers increased support and front impact protection by occupying most of the space under the MAD’s expansive front spoiler. Without it, a front-end collision could potentially force the front spoiler under the chassis, resulting in additional damage and loss of control.

🦇Made for Phat bodies MAD Mini

🦇Designed and printed in the BattCave. 

🦇Increases front impact protection.

🦇Low and wide profile offers additional support. 

🦇 M.A.D. specific rear bumper also available!

BattCave Open Ball Cups 4.8mm JKR-015-O

Open ball cup for easy shim adjustment without the need to pop off the ball stud

🦇 Sold in packs of 4.

🦇 4.8mm Cup size.

BattCave JOK3R+ Mini Short A-Arms

Developed specifically for the BattCave JOK3R+, our new Short A-Arms form an important part of the revised JOK3R+ front suspension.

The shorter A-Arm design has been developed to help give the JOK3R+ its easier, more forgiving driving characteristics, while retaining the precise and responsive front-end feel expected from the JOK3R platform.

Produced using our revised high-performance material, the new Short A-Arms offer increased strength and improved impact resistance, helping to make the JOK3R+ front end more durable without compromising precision or performance.

Each pair is also supplied with our new Front Steering Rubber Limiters. These act as impact absorbers, helping to dissipate heavy impacts through the front suspension and protect the surrounding components, further improving front-end durability.

Caster and camber geometry is built directly into each A-Arm, allowing racers to quickly change the front-end characteristics of the car and fine-tune the setup for different track conditions and driving styles.

Available Geometries

🦇 2+0 – JKR-3A20-S

🦇 2+1 – JKR-3A21-S

🦇 4+0 – JKR-3A40-S

🦇 4+1 – JKR-3A41-S

🦇 7+0 – JKR-3A70-S

🦇 7+1 – JKR-3A71-S

Key Features

🦇 New Short A-Arm Geometry – developed specifically for the revised JOK3R+ front suspension.

🦇 Easier, More Forgiving Handling – the revised suspension geometry contributes to the more accessible and confidence-inspiring driving characteristics of the JOK3R+.

🦇 Revised High-Performance Material – increased strength and improved impact resistance for greater front-end durability.

🦇 Front Steering Rubber Limiters Included – act as impact absorbers to help dissipate heavy impacts and protect surrounding front-end components.

🦇 Six Geometry Options – choose from 2+0, 2+1, 4+0, 4+1, 7+0 and 7+1 to fine-tune your front-end setup.

🦇 Built-In Geometry – caster and camber settings are incorporated directly into the A-Arms, making setup changes quick and repeatable.

🦇 Precision 3D Printed – designed and manufactured in-house using our proprietary 3D printing methods.

🦇 Sold in Pairs – supplied as one matched pair of Short A-Arms, complete with Front Steering Rubber Limiters.

🦇 JOK3R+ Specific – designed exclusively for the BattCave JOK3R+ Mini competition chassis.

BattCave JOK3R Mini Battery Retainer Band, JKR-018

🦇 Sold individually.

New BattCave 32DP Lightweight Long-Boss Aluminium Pinions... Full Range Now Available!

Designed by BattCave and precisely CNC-machined from high-grade T7075 aluminium, these lightweight long-boss pinions are built for smooth, efficient performance. Finished in sleek black with laser-etched markings for quick identification, and now with a full range of sizes to suit all track types, from tight technical layouts to fast open circuits. 

Core RC brass weight measuring 92 x 47mm and with 1mm thickness to allow you to position weight directly under your 1S or 2S shorty battery for the lowest centre of gravity. Super flat with Core RC logo etched on.

Introducing our new JOK3R silicone side bands!

Custom-moulded in silicone for better consistency.
Colour-coded for easy identification.
Wider tuning options.
Available in 3 different sets:

• Aqua – Neutral response set
• Lime – Medium response set
• Pink – High response set

Each set contains a total of 6 bands: 2 thick + 4 thin bands.

Also introducing the new BattCave Side Band Organiser Box - designed by Aiden Monk!

Designed by Aiden Monk and proudly featuring the BattCave logo, this sleek side band storage solution lets you easily transplant your existing side band holders into a smart, well-fitted box. Perfect for those who likes a tidy pit table.

*Picture of the box with inserts and bands installed (NOT INCLUDED!)

Recommended Usage:

•  Choose thick or thin bands (or a combination) to set your desired lean control (Thin allows more lean, Thick allows less lean).For example, you may want to use thin bands to allow more lean when grip is low, and thick bands when grip is high.
• Choose the colour to set your car's steering response. For example, you may want to increase your car's steering responsiveness on technical tracks, and reduce it on wider, flowing tracks. 

Care:
To keep the bands in tip-top condition, when not in use we recommend storing them in their case and avoid contact with solvents or brake cleaners. 

BattCave JOK3R Mini Rear Springs, JKR-S01R, JKR-S02R, JKR-S03R, JKR-S03R-SS

🦇 Sold individually.

🦇 Super Soft, Soft, Medium and Hard options Available.

🦇 Select from the drop down menu.

🦇 Special Size and Spring Rates for our JOK3R Mini.

BattCave JOK3R Mini Front Springs, JKR-S01F, JKR-S02F, JKR-S03F

With springs being one of the most important parts within the JOK3R, we spent many hours testing springs from many sources before settling on our range. They are of exceptional quality, and reliability! Which in turn generates that all important performance on track. 

🦇 Sold in pairs.

🦇 Soft, Medium and Hard options Available.

🦇 Select from the drop down menu.

🦇 Special Size and Spring Rates for our JOK3R Mini.

BattCave JOK3R Mini Front Springs, JKR-S01F, JKR-S02F, JKR-S03F

With springs being one of the most important parts within the JOK3R, we spent many hours testing springs from many sources before settling on our range. They are of exceptional quality, and reliability! Which in turn generates that all important performance on track. 

🦇 Sold in pairs.

🦇 Soft, Medium and Hard options Available.

🦇 Select from the drop down menu.

🦇 Special Size and Spring Rates for our JOK3R Mini.

BattCave JOK3R Mini Rear Springs, JKR-S01R, JKR-S02R, JKR-S03R, JKR-S03R-SS

🦇 Sold individually.

🦇 Super Soft, Soft, Medium and Hard options Available.

🦇 Select from the drop down menu.

🦇 Special Size and Spring Rates for our JOK3R Mini.

New BattCave 32DP Lightweight Long-Boss Aluminium Pinions... Full Range Now Available!

Designed by BattCave and precisely CNC-machined from high-grade T7075 aluminium, these lightweight long-boss pinions are built for smooth, efficient performance. Finished in sleek black with laser-etched markings for quick identification, and now with a full range of sizes to suit all track types, from tight technical layouts to fast open circuits. 

BattCave JOK3R Mini Replacement Motor Flange Plate. JKR-M01

🦇 Made from Aluminium.

🦇 Anodised black.

🦇 Sold individually.

BattCave JOK3R Mini replacement Front Ride Height Spacers. JKR-310-S, JKR-310, JKR-311, JKR-312, JKR-313,

Printed with our proprietary methods and our select filaments.  

🦇 3d printed in the BattCave. 

🦇 Fast and Easy Adjustments.

🦇 Use in combinations to achieve desired front ride height. 

🦇 0.5mm, 1mm, 1.5mm, 2mm, 4mm and full set options available.

🦇 Select from the dropdown menu.

BattCave JOK3R Front Bumper for Kamtec Monster Mini Bodyshell JKR-BP03

Specifically designed for the Kamtec Monster Mini Bodyshell, our latest 3D printed TPU low-profile front bumper offers increased support and front impact protection by occupying most of the space under the front spoiler. Without it, a front-end collision could potentially force the front spoiler under the chassis, resulting in additional damage and loss of control.

🦇Made for Kamtec Monster Mini body

🦇Designed and printed in the BattCave. 

🦇Increases front impact protection.

🦇Low and wide profile offers additional support.