KELLYS Theos AX20
The entry-level model of the new Theos AX line of full-suspension electric mountain bikes. It features an Avinox drive system and is designed for trail and all-mountain riding. The aluminum frame, featuring modern geometry and 160/170 mm of travel, is also designed for technical trails. The large 800Wh battery ensures a good range.
Estimated restocking date: 1Q / 2027
Description
AVINOX M2
up to 125 Nm
800 Wh
11 speeds
29"
170 mm (front)
ROCK SHOX Super Deluxe, DebonAir+ / R shock (205x65 mm)
A top-of-the-line rear shock designed for trail and enduro bikes. The key is a combination of sensitivity, support throughout the travel, and reliability—even on long descents. It offers a smooth and responsive initial travel, sufficient support in the mid-travel range, and control during hard impacts. Thanks to its larger volume (Super Deluxe), it handles long descents better without overheating or losing performance. DebonAir air spring. Select+ damping. Adjustable rebound.
KELLYS THEOS AX Series
The modern full-suspension frame made of Al 6061-T6 aluminum alloy utilizes FLT welded technology, which contributes to the frame’s high strength, stiffness, and long service life.
The rear suspension uses the proven Horst-Link system with a four-bar linkage and offers 160 mm of travel. It features a 1.8" tapered head tube and Boost 12 × 148 mm with a thru-axle.
KELLYS THEOS AX20 – an e-MTB with modern trail geometry
The KELLYS THEOS AX20 is a high-performance full-suspension e-bike designed for trail and enduro riding, combining a sturdy aluminum frame, a modern DJI Avinox M2 drive system, and high-quality RockShox suspension. With 170 mm of front travel and 160 mm of rear travel, 29" wheels, and modern geometry, it’s ready for technical climbs, fast descents, and challenging mountain trails.
Powerful DJI Avinox M2 Motor
At the heart of the model is the compact DJI Avinox M2 mid-drive motor with a maximum torque of 110 Nm and the option to use Boost mode for up to 125 Nm. The motor offers a very quick response to pedaling and plenty of power for steep climbs and technical sections. Control is provided by the Avinox Wireless Controller BC100.
800 Wh Battery
The integrated and removable DJI Avinox 800 Wh / 23 Ah battery provides ample power reserves for long mountain rides. The battery weighs approximately 3.74 kg and is elegantly concealed within the frame. Ride and system information is displayed on the Avinox DPC100 color OLED screen.
RockShox Enduro Suspension
Suspension is handled by a RockShox Domain Gold R fork with 170 mm of travel and a RockShox Super Deluxe rear shock with 160 mm of travel. The Horst-Link four-bar linkage helps maintain rear-wheel traction and ensures controlled suspension performance even during demanding rides.
Shimano CUES 1×11
Shifting is handled by a durable Shimano CUES U6000 1×11 groupset with an 11–50-tooth cassette. The wide gear range allows you to comfortably tackle steep climbs while offering sufficiently fast gears for brisk cross-country riding. Shimano Linkglide technology is designed with an emphasis on durability under the high loads typical of e-bikes.
Powerful Hydraulic Brakes
Safe stopping power is provided by Shimano MT410 hydraulic brakes paired with 200 mm Galfer Fixed Disc Wave rotors on both the front and rear. The large rotors deliver ample braking power during long and steep descents.
29" wheels and aggressive tires
The large 29" wheels help you navigate roots, rocks, and other obstacles while also increasing stability at higher speeds. The front Schwalbe Magic Mary 29 × 2.40" tire provides excellent traction and confidence in corners, while the rear Schwalbe Romy 29 × 2.40" tire enhances stability and power transfer. Both tires are tubeless-ready.
The bike’s sporty character is complemented by the Limotec D1 Remote dropper post with 150 mm of travel for sizes S–M and 170 mm for L–XL. With the push of a button, you can quickly lower the saddle before a technical descent to gain more room to maneuver over the bike.
The KELLYS THEOS AX20 is the ideal choice for riders looking for a capable and powerful full-suspension e-MTB with a modern DJI Avinox M2 drive system, an 800 Wh battery, RockShox enduro suspension, and durable Shimano CUES shifting. The combination of 170/160 mm of travel, 29" wheels, a four-bar frame, and powerful brakes makes it a confident machine for challenging trails, technical climbs, and fast mountain descents
EAN: 8585053861874, 8585053861881, 8585053861898, 8585053861904, 8585053861911, 8585053861928, 8585053861935, 8585053861942, 8585053861959
E-bike range calculator
Flat
Medium
Hills
The e-bike range is approximately
*Factors affecting total range include technical condition of the e-bike, battery age, ambient temperature, headwind, and riding technique
Avinox M2
The perfect balance of power and efficiency, with 110 Nm of torque (125 Nm with boost), a peak power output of 1100 W, and a lightweight design (2.65 kg). The second generation with helical gears and Dual Gear Engagement technology ensures quiet operation without knocking during descents. New bearings minimize resistance for a natural riding feel, while improved cooling ensures stability even in the heat. Integrated sensors enable adaptive power control based on cadence and riding conditions, making it the ideal, smooth workhorse for modern trail riding.
Avinox RS800 Battery
The Avinox RS800 battery, with a high capacity of 800 Wh, combines maximum power with the practicality of a removable system. Weighing 4.0 kg and featuring IP56 protection, it can be easily removed from the frame thanks to a locking mechanism and charged anywhere away from the bike. It delivers an impressive continuous power output of 1300 W and can reach a peak of 1500 W in Boost mode. Intelligent health management ensures 80% capacity retention after 500 cycles, and GaN technology enables ultra-fast charging.
Avinox DPC100 Display
A smart 2" OLED touchscreen integrated into the frame with a high resolution of 326 ppi and 800 nits of brightness, which automatically adjusts to the surroundings. It is equipped with GPS sensors, a gyroscope, a barometer, and support for Bluetooth 5.1 and ANT+. The DPC100 model stands out with support for Apple Find My for easy bike tracking and allows you to adjust virtually all system functions directly on the screen without needing an app. It records your route, performance, and cadence in detail. Controls are complemented by wireless handlebar controls (right controller available only on select models) and a built-in 10W USB-C port for charging accessories while riding.
Extended 5-year warranty on Kellys frames
Kellys provides a standard 24-month warranty and an optional extended warranty on the frame for a total of 5 years for the first owner. This benefit applies only to individuals using the bike for recreation and is non-transferable. The extended warranty applies only to the frame construction, not to the paint, carbon frames, or moving parts of full-suspension bikes.
To activate the extended warranty, online registration is required within 60 days of purchase. Another condition is to have the first warranty inspection after 100 km and then regular annual servicing at a professional service center.
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.
Contact: KELLYS BICYCLES CZECH REPUBLIC s.r.o., Havlickova 426, 753 01, Hranice, Czech republic, e-mail: infocz@kellysbike.com, phone: +420 581 698 810, web: https://kellysbike.com
Parameters
General
| Model year | 2027 |
| Load capacity | 120 kg |
| Brand | Kellys |
| Colour | Blue, Beige, Brown |
| Frame size | Frame L, Frame S, Frame XL, Frame M |
Motor
| Centre engine | Yes |
Video
Questions
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