KHS SixFifty 5555+ E – Full Suspension Electric Mountain Bike

Available at Bike Attack Electric – Santa Monica

The KHS SixFifty 5555+E is a powerful, all-terrain full-suspension electric mountain bike built for riders who crave capability, comfort, and confidence on any trail. Equipped with long-travel suspension, a robust aluminum frame, and a smooth-power mid-drive motor, this e-MTB is designed to take on everything from steep climbs to technical descents — with ease.

With its advanced 4-Bar Horst Link suspension, 150mm of travel, 29 x 2.6” traction-packed tires, and a reliable Shimano 12-speed drivetrain, the 5555+E brings together efficiency, durability, and uncompromising trail performance. Whether you're carving singletrack at Topanga, exploring fire roads in the Santa Monica Mountains, or charging down rocky terrain, this bike delivers a controlled, stable ride you can trust.

Key Features

Powerful Mid-Drive Motor

• MPF 6S Mid Motor – 36V / 250W / 80Nm torque

• Class II performance with smooth, natural pedal assist

• Excellent climbing power and torque for steep, loose terrain

Long-Range Battery

• 48V 14Ah (655Wh) lithium battery

• Ideal for long trail days, sustained climbs, and weekend adventures

Full-Suspension Performance

Frame & Rear Suspension

• E-6061 Aluminum, 4-Bar Horst Link frame

• 150mm rear travel

• X-Fusion 02 Pro RL air shock with lockout & external rebound

• Boost 12 x 148mm rear spacing for stiffness and precise handling

Front Suspension

• SR Aion 36 Boost fork – 150mm travel

• EQ air spring, 35mm stanchions

• Magnesium lowers, hydraulic damping, rebound & lockout

Premium Shimano Drivetrain

• Shimano Deore M6100 – 12-speed

• 10-51T wide-range cassette

• Smooth, reliable shifting under load

• Ideal for steep climbs and fast descents

Wheels & Tires

• WTB Scraper i30 TCS 29-inch rims – tubeless-ready

• Kenda Regolith Pro RFC 29 x 2.6” tires, 120 TPI

• Perfect combination of traction, rollover speed, and durability

Hydraulic Braking Power

• Tektro HD-E725 4-piston brakes

• Massive 203mm rotors

• Confident stopping in steep and high-speed trail situations

Fit & Geometry

• Sizes: M (17.5"), L (19")

• Color: Bora Bora Blue

• Dropper post included: Kind Shock KSP-900i

• Short stems & wide 35mm bars for modern trail handling

Why Buy the KHS 5555+E at Bike Attack Electric?

At Bike Attack Electric in Santa Monica, you get more than just the bike:

• Professional e-bike assembly (included)

• Warranty support & service center

• Local test rides

• Expert trail-riding guidance

• Optional bike pick-up & delivery

• Financing options available

We help you choose the right size, set up your suspension, dial in tire pressure, and keep your bike performing at its best year-round.

The KHS SixFifty 5555+E is the perfect choice for:

• Riders who want a full-suspension EMTB with long travel

• Trail and all-mountain riders

• Steep climbing + technical descending

• Riders who want a rugged and reliable build with high end components