Red RC » KO Propo

October 2, 2026

KO Propo EX-10 Transmitter – First Look

Japanese radio manufacturer KO Propo has just given its new EX-10 Transmitter its first public showing at the 64th All Japan Model & Hobby Show. Sharing one image of the new radio that is on its stand at the Tokyo show, the EX-10 is a unique design by KO Propo, inheriting the DNA of past EX-10 models. The EX-10 Helios was a legendary high-end radio released in the mid-2000. The new EX-10 features an adjustable steering angle, a redesigned steering mechanism for a more linear, direct feel, a high-resolution full-colour LCD, Real-Time ICS adjustment, Customizable front bar and weight balance. While compatible with existing XT receivers, it uses KO Propo’s new proprietary XT2 communication system and paired with the KR-426XT2 receiver, delivers their fastest response performance ever — with communication speed improved by 20% over previous models. The EX-10 is set to go on release in December.

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July 31, 2026

KO Propo 1:28 KR-243XT Receiver

Japanese radio manufacturer KO Propo has released this new receiver designed for 1:28 cars which is compatible with its EX-NEXT transmitters. Measuring12.5×18.5×7.3mm and weighing 1.2 grams, the KR-243XT 2.4GHz is an ultra-compact receiver perfectly suited for small 1:28 chassis and by pairing it with the EX-NEXT you can control your machine with the ultimate XT-compliant feeling that KO Propo delivers. Featuring 4 ports in total, it utilises ZH connectors, which are widely used in 1:28 equipment. You can connect commercially available 1:28 scale RC car servos and ESCs to each port. Additionally, you can connect a transponder to CH3 or CH4 for power supply. KR-243XT 2.4GHz will also be offered as part of a complete radio set with either the EX-NEXT BASIC or the EX-NEXT LDT BASIC transmitter.

Source: KO Propo [kopropo.co.jp]

April 10, 2026

KO Propo Digital Ride Height Gauge

Having originally unveiled it at the 2025 Tokyo Hobby Show, Japanese radio and servo manufacturer KO Propo has finally announced the release of its Digital Ride Height Gauge specifically designed for RC cars and enabling precise measurements in 0.1mm increments. Shipping from April 24th, to use simply insert the probe under the vehicle to instantly measure the vehicle height with a large numerical display on the LCD screen providing significantly improved visibility compared to conventional scale-type gauges. Covering a wide measurement range from 2mm to 38mm, this single device can handle everything from on-road cars to off-road buggies. A battery level notification LCD is easy to see at a glance, changing the colour of the frame displayed from “green (normal)” to “red (low),” notifying you in advance that it’s time to replace the battery. This prevents sudden battery depletion during use. The auto-sleep function automatically turns off the LCD after 1 minute of inactivity, saving battery power. Furthermore, it features a power switch that completely disconnects the battery when stored. Equipped with a function to correct slight errors caused by attaching and detaching the probe, calibration (zero point adjustment) can be easily completed using the included calibration gauge and the button on the main unit. The exterior parts of this gauge are produced using a 3D printer and due to this manufacturing process, layer lines and unevenness may be visible on the surface, but this does not affect the quality or function.

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October 13, 2025

KO Propo EX-NEXT Basic Limited Edition Transmitter

Following the launch of their new ‘EX-NEXT Basic’ transmitter earlier this year, Japanese radio manufacturer KO Propo is launching a new series of colour options in the radio. This is a special limited edition model that includes a coloured aluminium screw set and coloured grips. This made-to-order item is exclusive to the All Japan Model Hobby Show and you won’t be able to get anywhere else so pre-order must be made with the transmitters available in November. Colour options include Silver, Red, and Blue in the Standard Grip while the LDT models get a white grip with various screw colour options.

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July 10, 2025

KO Propo Cooling Fan Booster

Japanese radio and servo manufacturer KO Propo has release this new Cooling Fan Booster. This product is a boost circuit unit that connects between the receiver and the cooling fan, boosting the voltage to approximately 8V (input voltage range: 2.5V and above) to increase the fan speed and air pressure, thereby improving the cooling efficiency of the motor and ESC. It can be easily installed by connecting the connector. Excluding cable the booster measures 28 x 11.5 x 9mm.

Source: KO Propo [kopropo.co.jp]

May 15, 2025

KO Propo ‘EX-NEXT Basic’ Transmitter

With the 63rd Shizuoka Hobby Show taking place in Japan, radio manufacturer KO Propo is showcasing their new ‘EX-NEXT Basic’ transmitter. The XT adopted ‘EX-NEXT Basic’ model offers super fast response but by minimising the decoration of the main body KO Propo can offer the Japanese made radio at a more affordable price. With no changes to body specifications or features, you still get to use the performance of high end models. The ‘Basic’ is offered in two options, the XT and the new LDT (Lay Down Trigger) configuration. LDT is a new idea of laying down the trigger operation axis by 90 degrees. The feeling of being able to squeeze and press it effortlessly with your fingertips resting naturally. The ergonomic design that does not interfere with finger movement realises a seamless and linear operation feel throughout the entire stroke. It makes acceleration work and braking smoother and more enjoyable. The LDT makes you feel like your driving technique has improved by one or two ranks. This appearance, which also focuses on the quality of the operation feel, will take you to a new dimension. It can be adjusted to a range that even children’s fingers can reach. The ‘EX-NEXT Basic’ is due to start shipping in July.

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December 4, 2020

KO Propo EX-Next transmitter

KO Propo have dropped their all new EX-Next transmitter and KR-420XT receiver. Equipped with a new standard called ‘XT’ that they claim achieves the fastest communication speed in the industry. An all new control and radio communication software was developed making it about 3 times the speed of the EX-RR. High-speed communication in the XT advanced mode improves the information density that will be sent to the receiver for a smooth and more responsive feeling. The EX-Next also supports ‘XT Telemetry mode’ that uses 2-way communication. When 4S series servos, that support serial compatible, are connected to the B/S port in the new receiver you can use realtime ICS allowing you to easily change parameters of the servos from the transmitter without accessing the car directly. Even using the XT Telemetry mode that is 2-way communication, the high-speed response, while slower than XT advanced mode is still faster than the EX-RR.

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August 7, 2020

KO Propo EX-2 ST2 radio system

KO Propo have introduced their new EX-2 ST2 club-level radio system. The transmitter utilises the Extension Unit 2 steering wheel as well as upgraded angle sensors for the steering wheel and throttle lever that not only are about 100-times as durable as the standard potentiometers, they also offer a more linear output for greatly improved steering, throttle and brake feeling in both electric and nitro classes. The steering unit also offers dual ball bearings for the steering wheel shaft which optimises feeling and durability while a soft steering wheel return spring ensures a linear steering wheel feeling from the neutral point all the way up to the maximum operation angle. The ST2 transmitter is rounded out by the new V2.12 firmware as it is used with the high-end EX-RR transmitter. The radio system includes the compact size KR-241FH 4-channel receiver and it will hit stores at the end of August.

Source: KO Propo [kopropo.co.jp]