KELLYS Theos RS90

Based on the new RS series for 2026, the KELLYS Theos RS90 is the ultimate trail machine from KELLYS. It's built on an aluminium frame manufactured by robotic welding in Portugal, with a mullet wheel configuration - 29″ at the front and 27.5″ at the rear - for the optimum combination of stability and handling.

It delivers exceptional performance and endurance on a single platform - with a PANASONIC GXM MAXXPRO motor with around 105Nm of torque and a 900Wh battery, it has enough power for rough terrain and longer trips. Its advanced aluminium alloy frame (6th series), integrated removable battery and Boost 12×148 mm rear axle increase rigidity, stability and overall durability.

The KELLYS THEOS RS90 excels in excellent componentry and versatility - 29″/27.5" wheels for smooth rolling resistance, 12 speeds, hydraulic disc brakes and a quality air fork with ample travel (e.g. 160 mm) ensure comfort and control in the field. Equipped with 1x12 SHIMANO Deore XT Di2 gears that offer precise and fast shifting in any conditions. The combination of 29" front wheel and 27.5" rear wheel ensures optimal handling and traction on a variety of surfaces.

The KELLYS Theos RS90 P Royal Purple (900Wh) 2026 is a high-end e-bike designed for cyclists looking for maximum performance and luxury design. It's ideal for riders looking for an e-MTB without compromise: they want a combination of power, gear, top drive, yet trail playfulness.

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.

E-bike range calculator

Battery capacity: 500 Wh

300 Wh 600 Wh 900 Wh 1200 Wh

Rider weight: 75 kg

50 kg 80 kg 110 kg 140 kg

Assistance mode: 3

Min 2 3 4 Max

Route profile: Flat

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

Motor Panasonic GXM MAXXPRO

MAXXPRO – a revolutionary new e-bike drive system. Designed to deliver full power without unnecessary weight. The GXM MAXXPRO motor, developed jointly by Kellys and Panasonic, has a torque of 105 Nm and weighs just 2.56 kg, with a special magnesium alloy casing. Optimized cooling and mounting. The combined motor and battery system weighs approximately 6.1 kg. Modular and modern electronics: Open architecture, over-the-air (OTA) update capability, and compatibility with various batteries via CAN bus (open system).

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Battery Kellys Maxxpro 900 Wh

Kellys, in cooperation with German battery manufacturer BMZ, presents a new series of batteries called Maxxpro, which excel in high energy density. Energy density is the amount of energy stored in a given amount of material, measured in Wh/kg. Carbon batteries are up to 20% lighter and offer higher capacity. The batteries weigh approximately 3.5 kg. To achieve low weight and high energy density, Kellys used an all-carbon battery body.

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PANASONIC GXM Center Display 501

A highly modern central display designed for e-bikes with Panasonic drives. This display provides a clear overview of all key information – from speed, range, and assistance level to navigation and connection to a smart app via Bluetooth® 5.0. Enables stable and fast connection to smartphones and Panasonic apps, including firmware updates and ride data transfer. Intuitive navigation. The display provides information on speed, range, battery status, assistance mode, and other bike functions. The display is resistant to water, dust, and vibrations, and is readable even in direct sunlight.

GXM Remote 501

A modern control unit located on the handlebars, designed for intuitive control of e-bikes equipped with Panasonic GX series drives. The controller allows quick and safe switching between assistance levels and control of additional functions. Designed to be easily accessible with your thumb, minimizing the need to take your attention off driving. Ergonomic design. Intuitive button layout. High durability. Fast response and precise control. Seamless integration with Panasonic GX and GXM series motors and displays.

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

E-bikes Kellys