Stunner Step-Over 5

Like Riding On A Cloud
144 Reviews
5/5

Color Options

40

Miles Per Charge

59 lbs

Weight

Cruisers are the most comfortable electric bicycles thanks to the laid-back frame, sit-up straight riding position, and relaxed shoulder-level arm height. You’ll feel right at home on The Stunner. The Stunner has an incredible range of more than 60 km (40+ miles) on a single charge. Comfort isn’t the only thing The Stunner has going for it! With a 750W mid-motor, its got more zip than most eBikes.

Key Features

750W Mid Drive

Motor

20+ MPH

Unlockable

40 Miles

Max Range

1200 Watt - Hour

Battery

330 lbs

Max Load

Class 2

eBike

Gear & Accessories

Fully Assembled

Veteran Ran

0% Financing

1 Year Warranty

In-House Repair

Engine Model: Bafang 750W 120Nm Torque, Mid Drive, Cadence Sensing with Throttle

Dual Battery: No

Top Speed: 20 Mph from factory. Unlockable up to 30+ Mph

Gear System Description: Sturmey Archer 5-Speed Internal Hub Gearbox. Quite, smooth, maintenance free shifting!

Color Options: Blue, Grey, Green

Bike Weight: 59 Lbs

Brake System: Biktrix Dual Piston Hydraulic Brakes w/160mm Rotors

Internal Battery: 48V 17Ah 810Wh (est. 40mi/50km range)

Display: Bafang Color Display

Frame Material: 6061 Aluminum

Fork: Suntour NEX w/ 60mm Travel & Lockout

Wheel Size: Kenda K-rad 2.3″

Stem: Promax Adjustable Stem w/25.4mm Clamp

Pedal Assist Levels: 5

Walk Assist: Yes

5’5″ – 6’5″

Lifetime frame warranty and 1-year on all electronics.

What makes an electric bike different from a regular bike?
An electric bike has a few extra components over a non-electric bike. These are the display, control panel, throttle, brake cut-off sensors, motor, pedal-assist-sensor, and gear shift sensor. These extra components assist in climbing hills, riding faster, riding further, and getting more exercise.

The basics
One of the first things you’ll notice on an electric bike is the display in the middle of the handlebars. Turn on the display by using the power button on the bike’s controls; these are usually located near the left-hand grip. Once the display is on, all relevant information for using your electric bike can be accessed. You will be able to view your speed, battery-life estimate, odometer, pedal-assist level, as well as settings to help you configure your bike in a way that works best for you. For more information on settings, explore our online help-desk: https://support.biktrix.com/hc/en-us.

The brake levers have cut-off sensors that pause the motor under braking. These are essential to make sure that the motor and brakes do not work against each other and cause excess stress on your electric bike’s components. If you ever have trouble with your bike’s motor not engaging, try disconnecting these sensors first as it is one of the most common causes.

The electric bike’s throttle will also be located near the left-hand grip, this can be used at any time to receive full-power from the motor. Using the throttle is ideal for getting a boost off of the line or climbing a steep hill.

Riding an electric bike
If you have ridden a traditional bike, riding an electric bike will be a natural transition.

Using the up and down buttons on the controls, you can increase or decrease the amount of assist that the motor provides. An electric bike usually comes with 1-5 levels of assist, with level 1 delivering minimal help and level 5 having the bike do most of the work. Higher assist levels and throttle use will lower the range from your battery.

The bike’s gear shifter is near the right-hand grip. This controls the bike’s gears as it would on a non-electric bike. These gears can be used in tandem with the different pedal-assist levels to have the most control over how you ride. The largest gear will provide the most amount of torque and acceleration while the smallest gear provides the highest top speed. Biktrix bikes also come standard with a gear-shift sensor which cuts the power from the motor while shifting in order to preserve the bike’s drivetrain. This is especially important for mid-drive bikes where high-torque is applied to the chain.

Range is dependent on various factors. Thus, the speed at which you ride the bike will have a major impact. See below for the average range at various speeds. In addition to speed, there are order external factors that affect the range. The range advertised in our brochures and manuals is based on averages. Thus, it is assumed that the average rider weighs 70 kg, cycles on relatively flat terrain and shifts gears actively. Below you will find that leading factors that affect range:

  • Weight. The total weight of the bike, the rider and load will affect the range.
  • Gear-shifting behaviour. Actively shifting gears increases the range. Just like a car, when setting off from a standstill, you should start in the lowest gear. Never start in the highest gear; this will adversely affect your range.
  • Type of sensor. E-bikes are fitted with a pedal force sensor or a rotation sensor. A pedal force sensor amplifies your own effort whereas a rotation sensor only provides assistance while pedalling. Put another way, the rider will always get maximum assistance with a rotation sensor, which results in less range. 
  • Type of read surface. The surface over which you are cycling has a substantial effect on your range. Thus, cycling along an unpaved road surface will reduce your range. 
  • The weather Cycling with a tailwind or into a headwind will increase or reduce your range. Temperature will also affect it. Thus, at extremely low temperatures (< o degrees) the battery is able to store less energy, which reduces the distance you can cycle. 
  • Hilly terrain You can cycle further on flat terrain than in the hills. The magnitude of the impact will also depend on the type of electric system. Thus, a mid-mounted motor is better suited to hills due to the motor’s thermal stability.
  • Tyre pressure

In view of the fact that you will probably experience a number of the abovementioned factors, here are a number of examples of the magnitude of their impact;

  • If you are cycling on good tarmac in a hilly area and you weigh 95 kg, then you may well find your range reduced by up to 20% compared to what is shown for the average range. 
  • If you are cycling into a strong headwind, it can make a difference in range of up to 40%. 
  • If you are cycling along an unpaved road, it will make cut your range by around 30% compared to cycling on tarmac.