KELLYS Theos F90

KELLYS Theos F90 – A Top-of-the-Line E-Bike with No Compromises

The KELLYS Theos F90, in an elegant gray finish, represents the pinnacle of technology among full-suspension e-bikes. This model is an uncompromising machine designed for riders who demand maximum performance, confidence on brutal descents, and endless energy for demanding all-day rides. With a total weight capacity of 120 kg, it’s ready for any trail challenge.

Brutal Power and Endless Energy

At the heart of this e-bike is the proven Shimano EP8 mid-drive motor with 85 Nm of torque. It provides instant yet perfectly controllable assistance on every climb. Power is supplied by an integrated battery with an above-average capacity of 820 Wh, giving you the freedom to plan the longest routes without worrying about running out of power.

Smart Electronic Shifting

A major upgrade is the inclusion of the modern 12-speed Shimano Deore XT Di2 electronic shifting system. The combination of the Firebolt shifter (SW-M8150-IR) with I-Spec EV technology and the XT M8150 rear derailleur ensures lightning-fast, precise, and absolutely reliable shifting—even at full speed. With the premium Shimano Deore XT cassette (10-51T), you have a huge range of gears at your disposal for any terrain.

Uncompromising suspension with premium travel

Top-tier suspension ensures a smooth ride over any terrain:

• Front: The massive FOX 38 Float Factory fork, featuring a premium Kashima Coat finish, GRIP2 damping, and 180 mm of travel, maintains an uncompromising line and absorbs even the biggest impacts.

• Rear: The RockShox Super Deluxe Ultimate RC2T shock (230x65 mm) with DebonAir+ technology provides 170 mm of rear travel and offers perfect sensitivity and stability.

Top-of-the-line components and confidence in corners

The bike is equipped with top-of-the-line SCHWALBE Nobby Nic Evo Super Trail tires featuring Tubeless Easy technology and the ADDIX SpeedGrip compound. Thanks to the combination of a 29" front wheel (2.40" width) and a 27.5" rear wheel (2.40" width), you get the ideal mix of stability, excellent off-road capability, and agile handling.

Uncompromising Shimano Deore XT M8120 4-piston hydraulic brakes with large 203mm rotors on both wheels ensure safe stopping power in any conditions.

Ergonomics and Comfort for the Rider

The cockpit is equipped with premium RACE FACE Aeffect R 35 components—a 50 mm stem is paired with wide handlebars (780 mm) and comfortable KLS Poison OneLockon grips for maximum control. Of course, it comes with a top-of-the-line FOX Transfer Factory Kashima Coat dropper post with remote control from the handlebars (150 mm travel for size M, 175 mm for L) and an ergonomic fi’zi:k Taiga saddle.

The KELLYS Theos F90 is, quite simply, a technology-packed e-bike for the most demanding riders. If you’re looking for uncompromising performance, top-notch comfort, and maximum safety on the trails, this bike is the clear choice.

Need help choosing the right e-bike? Use our e-bike selection guide or contact us directly.

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 Shimano EP 8

The Shimano EP8 electric motor, rated at 250W and 85Nm of torque, means 21% more power compared to the most powerful motor to date, the Shimano E8000. 10% lighter weight with a total of 2.6 kg thanks to the use of magnesium for the motor block. Redesigned bearings and gear connections inside the motor, resulting in 36% less friction and drag when pedalling with the drive off or above the motor assist speed limit.

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Battery BMZ 820 Wh

Powerful battery for long range electric bikes. With a capacity of 820 Wh and a voltage of 36 V, it provides long range, high efficiency and reliability even on demanding routes. The integrated Battery Management System (BMS) protects the battery from overheating, overvoltage and deep discharge.

The compact design designed to be fully integrated into the frame of the e-bike provides protection and a sleek look. The 820 Wh (22.77 Ah) capacity provides a range of up to 200 km depending on riding style, terrain and level of assistance. It supports fast charging, with 80% of capacity achievable in just 2-3 hours with the appropriate charger. Uses high quality Li-ion cells that last up to 1000 charge cycles while maintaining high performance.

Display Shimano SC- E7000

Original display Shimano STePS SC-E7000. Minimalist design, clear display. Compact wireless bike computer showing all important data about your bike and your rides. With the E-TUBE PROJECT app on your mobile device, the data displayed and the functionality of the entire SHIMANO STEPS E-BIKE system can be easily customised.

• Very easy to read display.
• Flat design for MTB.
• Compatible with SHIMANO STEPS components
• Up to 5 riding modes available
• Settings directly in the field using the simple E-TUBE RIDE app
• Easy to update the internal display control program using the E-TUBE PROJECT app on your mobile device.

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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