E-Bike Frameset – HNF Nicolai Sd3 Urban
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Buying advice for an Mountainbike Frameset
Frame material
Aluminium is one of the most commonly used materials for e-bike MTB frames due to its lightness, stiffness and resistance to corrosion. Aluminium frames are generally less expensive than frames made from other materials and still offer good durability and strength. They are a popular choice for e-bikes in various price ranges and applications. Carbon fibre is a light and stiff material that offers excellent performance and ride quality. Carbon fibre frames absorb vibrations well and offer a responsive ride. However, they are often more expensive than aluminium frames and can require more maintenance to avoid damage. Steel frames were the norm for bike frames in the past and are still popular with some e-bike enthusiasts. Steel frames are known for their smooth and comfortable ride as well as their durability. However, steel frames are heavier than aluminium and carbon frames. Titanium frames are popular with some e-bike MTB models due to their high strength, light weight and corrosion resistance. Titanium frames offer outstanding ride quality but are often the most expensive option on the market.
Frame types
Hardtail E-MTBs have front suspension (suspension fork) while the rear wheel remains rigid. This type of frame is lighter, simpler and offers efficient power transfer when pedalling. Hardtails are well suited to trails with less technical sections, XC racing and general off-road riding. Full-suspension e-MTBs have both front and rear suspension. These frames offer better traction, control and comfort on demanding trails and when riding downhill. Full suspension bikes are ideal for technical trails, downhill riding and enduro racing. Trail E-MTBs are a versatile option that offers a good balance between climbing ability and downhill performance. These frames usually have moderate travel suspension (120-140 mm) and are suitable for a wide range of trail conditions, from XC trails to more demanding tracks. Enduro E-MTBs are specifically designed to compete in enduro races, which include technical descents and challenging climbs. These frames have a robust construction, mid to long travel suspension (140-180 mm) and are designed to handle hard hits and rough conditions. And downhill E-MTBs are designed for use in extreme downhill racing and freeride riding. These frames have a robust construction, long travel suspension (180-200+ mm) and special geometries that provide maximum stability and control at high speeds.
Geometry
The frame geometry of an E-MTB refers to the shape and dimensions of the frame, including the angles and lengths of the tubes and the positioning of components such as the fork, seatpost and handlebars. The frame geometry influences the handling, comfort and efficiency of the bike. The seat tube angle determines the position of the saddle in relation to the pedalling crank. A steeper seat tube angle can lead to a more efficient pedalling motion and better power transmission, whereas a slacker angle allows for a more relaxed riding position. The bottom bracket height influences the handling and stability of the bike. A higher bottom bracket height offers better ground clearance and can make it easier to ride over obstacles, while a lower bottom bracket height can lead to more stable handling.
Height
Body size is an important factor when choosing a frame size. Riders should choose the frame size that best suits their body size to ensure a comfortable and ergonomic riding position. A frame size that is too large or too small can lead to discomfort or poor ride quality. Crotch length is also important when choosing the right frame size. Riders should ensure that they have enough standover height to stand comfortably over the top tube of the frame.