KELLYS Theos R50 LTD
Full suspension mountain e-bike with improved suspension and modern technology. Mullet combination. Handles even the toughest terrain. Equipped with Panasonic GX Ultimate motor, 725 Wh battery, hydraulic brakes and 9 speeds.
PANASONIC GX ULTIMATE
95 Nm
725 Wh
9 speeds
29", 27,5"
150 mm (front)
The ROCK SHOX Deluxe Select+ R, LinearAir+ Rear Shock (210x55 mm) is a premium suspension component designed to provide superior performance and comfort for mountain bikes tackling challenging terrain. At its core is DebonAir+ technology - an air spring system that provides responsive feel, absorbing shock with remarkable efficiency while maintaining excellent traction and control. This technology ensures you tackle rough trails and technical descents, feeling minimal fatigue and maximum enjoyment.
Electric bikes with a mullet setup (a combination of a 29" front and 27.5" rear wheel) are becoming increasingly popular among enduro and trail riders. This concept brings the benefits of both wheel sizes, improving off-road handling.
- Better off-road handling
- Improved stability
- Better handling
- Lower centre of gravity
- A more natural ride feel
E-bike range calculator
The e-bike range is approximately
*Factors affecting total range include assist mode settings, technical condition of the e-bike, battery age, ambient temperature, headwind, and riding technique
The KELLYS THEOS R50 LTD is a high-end full suspension mountain e-bike designed for demanding riders looking for performance, durability and modern technology. This model combines rugged construction with advanced components to provide the ultimate off-road riding experience. Optimized wheels in mullet design.
Key features and benefits:
Powerful Panasonic GX Ultimate motor
At the heart of the KELLYS THEOS R50 LTD e-bike is the Panasonic GX Ultimate mid-motor with 95 Nm of torque, providing powerful and smooth assistance on even the most demanding climbs.
The integrated 725 WhKELLYS Re-Charge K1 battery allows for a long range, making it ideal for all-day off-road excursions.
Benefits:
- Powerful motor for demanding terrain
- High-capacity battery for long range
Durable frame and advanced suspension
The 6 Series aluminum alloy frame is made using advanced robotic welding, ensuring high strength and durability.
The ROCK SHOX Deluxe Select+ R, LinearAir+ (210x55 mm)rear shock and ROCK SHOX Recon Silver RL (29") Boost fork , with 150 mm of travel up front, provide excellent control and comfort on rough terrain.
Benefits:
- Tough and durable frame for tough conditions
- Advanced suspension for maximum comfort
quality components for reliable performance
SHIMANO Cues U4010-9 Rapidfire Plus shifters provide precise and fast shifting with 9 speeds.
SHIMANO MT200 hydraulic disc brakes provide reliable stopping power in all conditions.
Benefits:
- Precision shifting for efficient riding
- Powerful brakes for safety
Optimised wheels for better handling
The combination of a 29" front wheel and 27.5" rear wheel (mullet setup) provides the ideal balance between stability and agility, which is advantageous in technical passages.
Benefits:
- Improved handling on off-road terrain
- Stability at high speeds
Modern technology for easy handling
The PANASONIC Bluetooth® 5.0 display provides clear information on battery status, speed and other parameters, making it easy to plan your ride.
Benefits:
- Intuitive controls
- Access to important data while driving
The KELLYS THEOS R50 LTD e-bike is a great choice for riders looking for a powerful and reliable e-bike capable of tackling even the most challenging terrain.
KELLYS BICYCLES s.r.o. now offers an extended warranty of 5 years. This extended warranty covers the frame of the e-bike and its claim when a manufacturing or material defect is proven to be the cause.

Motor Panasonic GX ULTIMATE
To maximize your e-MTB driving pleasure, here is the best motor in its class with 95 Nm of torque and a weight of just 2,95 kg, which will allow you to reach the toughest goals.
Even at low cadence, the motor unit provides a constant and powerful output of 95 Nm, thanks to which the GX Ultimate is one of the most powerful motor units in its class and supports you even in the most demanding conditions.

Battery Kellys-BMZ 725 Wh / 20 Ah
The Panasonic K1 725 Wh / 20 Ah / 36V battery is an integrated lithium-ion battery from Kellys in cooperation with BMZ. Small, compact, powerful, with a nice shape and stylish appearance. The fully integrated K1 725 Wh battery is one of the best power-to-weight ratio batteries on the market. You will literally be amazed by the results of this powerful battery. The combination of power and power reserve makes the battery one of the best components of an e-bike.
The battery is capable of taking the e-bike up to 180 km on a single charge. But of course it always depends on the track profile and how the assistance is used.

Side display Panasonic
The side colour display is relatively small and compact and is located to the left of the handlebar grip. Its screen has a diagonal of about 4.5 cm. It offers a clear and crisp overview of all the necessary driving information. The display is also connected to Bluetooth™, which allows the use of smartphone apps such as "Komoot" and "Strava".
The side colour display is very clear overall. The screen is on the right and on the left are two large arrow keys and a narrow vertical key that functions as a menu. The control unit is IPX5 rated against water and dust.
Functions: speedmeter, maximum speed, average speed, odometer, remaining riding distance, riding distance, assist mode, assist power indication, waterproof after IPX5, state of battery charge, 10 languages selectable etc...

Designing and manufacturing e-bikes is not just about putting mechanical components together. It's more than that. The purpose for which an e-bike is created is important, because it has a unique purpose in each person's life. This mission gives every KELLYS e-bike its reason for being. Thanks to modern technology, skilled designers and the best materials, the Kellys brand has some of the highest quality e-bikes.
We are specialists in KELLYS electric bikes. We offer full suspension and fixed mountain bikes, touring bikes, men's and women's electric bikes with an excellent price / performance ratio.
Parameters
General
Brand | Kellys |
Load capacity | 120 kg |
Colour | Blue, Green |
Motor
Motor manufacturer | Panasonic |
Engine type | Panasonic GX Ultim. |
Torque | 95 Nm |
Centre engine | Yes |
Battery
Battery capacity | 700 - 799 Wh |
Exact capacity | 725 Wh |
Questions
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