The top speed for both the Atlas and Colossus e-bikes is approximately ≤32 km/h.

You can travel approximately 80 km on a single battery charge for both the Atlas and Colossus e-bikes.

The charging time for your Herk e-bike battery is 5-6 hours. Push the switch on the top of battery pack to show the power level of the battery. You can charge battery in time according to the power indicator. When the power level is lower than 50%, please charge in time. Otherwise, the service life of the battery will be affected because over discharged.

- Store the battery in a location that will not experience extreme temperatures (either hot or cold), such as an insulated garage or in your home. - Do not store it fully charged or on the charger all winter. - Store the battery with a charge level between 40% and 80%. - Store the battery in a dry location. - Don't leave the battery on the charger for prolonged periods of time. - Charge the battery in a location where a hot battery or charger (should a malfunction occur) would not cause a damaging fire.

Yes, the products have a contractual warranty of two 2 years from the date they were purchased by the consumer. The warranty is limited to the replacement or repair of non-compliant or defective products, excluding any compensation. In case the product is not repaired, it may be replaced by a new product of the same reference, or by a product of a different reference whose technical characteristics are at least equivalent. For more information, download the owner's manual.

1. Is your bike the right size? To check, see Section 3.A. of your manual included with your bike. If your electric bicycle is too large or too small for you, you may lose control and fall. 2. Is the saddle at the right height? To check, see Section 3.B. of your manual. If you adjust your saddle height, make sure that you follow the Minimum Insertion instructions in Section 3.Are the saddle and seat post securely clamped? A correctly tightened saddle will allow no saddle movement in any direction. See Section 3.B of your manual for moredetails. 4. Are the stem and handlebars at the right height for you? If not, see Section 3.C of your manual to see what you can do about it. 5. Can you comfortably operate the brakes? If not, you may be able to adjust their angle and reach. See Section 3.D and 3.E in the provided manual

1. Do you have all the required and recommended safety equipment? See Section 2. in manual. It is your responsibility to familiarize yourself with the laws of the areas where you ride, and to comply with all applicable laws. 2. Do you know how to check the wheel? The bolts and nuts should be tight with no signs of loosening. Riding with an improperly adjusted wheel can cause the wheel to wobble or disengage from the bicycle and cause serious injury or death. 3. If your bike has toe clips and straps or clipless (“step-in”) pedals, make sure you know how they work (see Section 4.E). These pedals require special techniques and skills. Follow the pedal manufacturer’s instructions for use, adjustment and care. 4. Does your bike have suspension? If so, check Section 4.F. Suspension can change the way a bicycle performs. Follow the suspension manufacturer’s instructions for use, adjustment and care. 5. Do you have “toe overlap”? On smaller framed bicycles your toe or toeclip may be able to contact the front wheel when a pedal is all the way forward and the wheel is turned. See section 5.E of your manual.

Tires & Wheels: Make sure tires are correctly inflated (see Section 5.G.1). Check by putting one hand on the saddle, one on the intersection of the handlebars and stem, then bouncing your weight on the bike while looking at tire deflection. Compare what you see with how it looks when you know the tires are correctly inflated; and adjust if necessary. Tires in good shape? Spin each wheel slowly and look for cuts in the tread and sidewall. Replace damaged tires before riding the bike. Wheels true? Spin each wheel and check for brake clearance and side-to-side wobble. If a wheel wobbles side to side even slightly, or rubs against or hits the brake pads, take the bike to a qualified bike shop to have the wheel trued. CAUTION: Wheels must be true for the brakes to work effectively. Wheel truing is a skill which requires special tools and experience. Do not attempt to true a wheel unless you have the knowledge, experience and tools needed to do the job correctly. Brakes: Check the brakes for proper operation (see Sections 5.C). Squeeze the brake levers. Are the brake quick-releases closed? All control cables seated and securely engaged? Do the brake pads touch the wheel rim within an inch of brake lever movement? Can you apply full braking force at the levers without having them touch the handlebar? If not, your brakes need adjustment. Do not ride the bike until the brakes are properly adjusted. Quick Releases: Make sure the front wheel, rear wheel and seat post quick releases are properly adjusted and in the locked position. See Section 5.A and 5.B. Handlebar and saddle alignment: Make sure the saddle and handlebar stem are parallel to the bike’s center line and clamped tight enough so that you can’t twist them out of alignment. See Sections 3.B and 3.C. If not, align and tighten them. Handlebar ends: Make sure the handlebar grips are secure and in good condition. If not, replace them. Make sure the handlebar ends and extensions are plugged. If not, plug them before you ride. If the handlebars have bar end extensions, make sure they are clamped tight enough so you can’t twist them. If not, tighten them. WARNING: Loose or damaged handlebar grips or extensions can cause you to lose control and fall. Unplugged handlebars or extensions can cut your body and can cause serious injury in an otherwise minor accident.