Carbon fibre fold up bike 20 inch Carbon Fiber Frame Portable Bikes | EWIG

Short Description:

1. Our carbon fibre fold up bike 9s  can be opened and closed within seconds, easy to store and carry. High-quality and lightweight carbon fiber material, not easy to rust. Safe structural design, can bear the weight of 90KG.

2. The height and angle of the saddle and handlebar can be adjusted to maximize comfort, stability and safety. The signal speed design is easy to operate while driving; Stable speed and more effort-saving driving. Anti-skid handlebar helps prevent the hand from slipping away from the handlebar

3. Our carbon folding bikes are manufactured in accordance with EU bicycle safety regulations; they have been thoroughly tested, inspected and packaged before delivery to keep the products in good condition.

 4. EWIG carbon fiber folding bike factory is a big bicycle factory in China . We supply with all kind of folding bike frame design, wholesale carbon folding bike can be as city bike for commuting, or for doing exercise. Good for old or young people. We have more than 10 years experience on bike manufacture. 

Product Detail



chinese carbon fiber bike

Carbon fiber fold-up bikes are hand-built and shipped straight to you.

EWIG 9S carbon fibre folding bike is designed with a more durable carbon frame, disc brake, and easy folding mechanism system, keep the sport easy

9 Speed carbon folding city bicycle with Shimano M2000 Shifter, Shimano M370 rear derailleur. This foldable bike with a quality gear system that rides smoothly.

Ready Ride by EWIG Folding Bike: Be riding sooner than ever before!

EWIG-9S Carbon Folding Bike

Lightweight Carbon fiber Frame + Folding Design + Stylish Looking

Full Carbon Folding Bike

Foldby one 9s
Model EWIG 
Size 20 Inc
Color Black Red
Weight 8.1KG
Height Range 150MM-190MM
Frame & body carrying system
Frame Carbon fiber T700
Fork Carbon fiber T700*100
Stem No
Handlebar Aluminum black
Grip VELO Rubber
Hub Aluminum 4 bearing 3/8" 100*100*10G*36H
Saddle Full black road bike saddle
Seat Post Aluminum black
Derailleur / brake system
Shift lever SHIMANO M2000
Front derailleur No
Rear Derailleur SHIMANO M370
Brakes TEK TRO HD-M290 Hy draulic
Transmission system
Cassette sprackets: PNK,AR18
Crankset: Jiankun MPF-FK
Chain KMC X9 1/2*11/128
Pedals Aluminum foldable F178
Wheelset system
Rim Alumimum 
Tires CTS 23.5

EWIG 9S Carbon Folding Bike Features​:

Stronger carbon folding frame

  • Lightweight folding bike.
  • Front and rear aluminum alloy disc brakes.

Shimano 9 Speed Gears

  • With rear carrier.
  • Shimano's 1*9-speed gearbox ensures total control in every situation.

Easy to Fold

  • Folds in seconds.
  • Easy to fold.
  • Easy to store.
  • Easy to ride.

Comfortable Seat

  • Comfortable seat for carbon folding bike.
  • Adjustable alloy seat post.

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  • carbon fiber bike weight

    Carbon folding bikes are convenient to store in small spaces, though they can be a bit on the heavy side. Some indepedent designers are turning to crowdfunding to get their lighter.

    The average folding bike weighs in at around 8kg, but they can vary from just over 8kg to up to 10kg. As mentioned above the weight of a folding back is extremely important. Especially if you are likely to spend a lot of time carrying and manoeuvring your bike around by hand.

    As mentioned above the weight of a folding back is extremely important. Especially if you are likely to spend a lot of time carrying and manoeuvring your bike around by hand.

    The weight of fold-up bikes can differ quite a lot when it comes to their weight and this is often down to the materials they are made from. For example, a carbon frame folding bike can combine your need for a lighter bike that is still sturdy and strong, and it is also extremely light, and can save you several kilos compared to a steel folding bike.

    carbon fiber bike frame durability

    Carbon mountain bikes are very durable in general. The power-to-weight ratio is 18 percent higher than aluminum. High-end mountain bike frames can take up to 700 KSI (kilopound per square inch) before they snap.

    A carbon bike is more aptly described as a bike with a carbon composite structure. This means the bike is not made of pure carbon; it also has several other components such as epoxy resin. Carbon is the reinforcing fiber that could be sourced either from glass or Kevlar. It is the epoxy resin that fuses them together.

    In order to come up with high-quality carbon bikes, advancements have been made in the manufacturing of stronger carbon filaments and their binder, which is resin.

    I have mentioned that a carbon bike is basically made from carbon-fiber composite. The specific strength or power-to-weight ratio is high, which is roughly 18 percent more than aluminum. This means the bike becomes more susceptible to extreme loads during an impact.

    Just like other materials, carbon will deteriorate with usage albeit, only after a long time. Carbon has the longest frame fatigue which enables many manufacturers to offer a lifetime warranty on frames made with this material. When aging happens, the resin matrix would be forming little cracks, and all that’s left are the connections of the fiber. The stiffness of the bike frame will slightly change in the process.

    Ultimately, you can be assured that when you consider a carbon bike, it will be a durable piece of equipment.As much as you can, you must avoid moderate to high impact on your bike, regardless of what material it is made of, for the sake of not only your bike, but also your own safety.

    tube to tube carbon bicycle frame construction

    Once the customer signs off on the frame drawing and geometry the bike build commences. The carbon tubes are cut and mitered to length. The tubes are mitered using a diamond tipped hole saw. They are then inserted into the jig to test their fit. The tighter the fit the stronger the joint. With every frame build there is great attention to detail. We will take the time to file and sand the joints by hand to ensure the tightest fit possible so your frame is the strongest it can be.

    The tubes are then taken out of the jig. The ends are covered in masking tape and the builder then sands down any rough sections and prepares the surface to ensure a good bond. A high strength adhesive is used to bond the tubes together and then its left to cure. The frame is then removed from the jig once it has reached solid state. Before the joints are wrapped with prepreg, a fillet is built up around the joints. This ensures a smooth transition from one tube to the adjoining tube avoiding any acute angles in the fibres and minimising potential weak spots.

    Once the joints are wrapped, the whole frame is vacuum bagged. It is then cured in the oven.When the frame has cooled and the bagging material has been removed there is a thorough inspection of fibre compaction. Any leftover resin is then removed from the frame with some light sanding. The frame is then ready to be handed over to the painter.

    carbon fiber bike care

    1. Buy a torque wrench

    Squeezing can easily damage the carbon fiber, such as over-tightened bolts and clamps. The handlebars and seatposts are the most common causes of damage to the carbon fiber frame.If you have a carbon fiber bike, a torque wrench is necessary, it can ensure that you will not use more than the recommended torque to tighten the components.

    2. Use carbon assembly paste

    The relatively small torque required for the carbon frame and its components also has a drawback that it is easy to slip off. This especially affects the seatpost. Don’t risk trying to tighten the seatpost with extra, more force, you should use carbon assembly paste. This is a gel containing fine particles, similar to a thin film, which increases friction between the contact surfaces to prevent slippage. Assembling paste and torque wrench are necessary for carbon fiber bike owners.

    3. Keep it clean

    Regular cleaning can give you a chance to inspect the bike carefully to see if there are obvious signs of damage. Regardless of the material of the frame, this should be your routine during riding. Of course, rough cleaning also needs to be avoided, which will damage the epoxy resin wrapped around the carbon fiber. Any degreaser or cleaning products for bicycles and old-fashioned mild soapy water should be used appropriately and reasonably.

    4. Don’t reverse

    For metal frames and parts, for example, during the installation process of handlebars and seatposts, it is normal and acceptable to give a certain amount of rotation or pull for fine adjustment after being fixed. However, this step will cause damage on the carbon fiber car and must be strongly avoided. The correct way is to use the recommended torque value and use the assembly paste. If the position and angle of the parts need to be adjusted, the parts should be completely loosened in advance.

    5. Avoid chain jamming

    Many people have encountered the situation of chain drop, especially when shifting gears incorrectly. In the worst case, the chain gets stuck between the smallest chainring and the chainstay after the chain is dropped, and it gets stuck instantly. For carbon fiber cars, this is a great “pain”. When this happens, stop pedaling immediately and avoid further exertion. After returning home, thoroughly clean and relubricate your drive system. Check your chain, including wear, elasticity, etc. It’s better to replace it if necessary.

    what is the best carbon structure for bike frame?

    Carbon is pretty much the number one material of choice when it comes to mainstream frame construction and as such there are an awful lot of carbon bike frames out there and there’s no one ‘best carbon bike’.Whilst the frame material is at the heart of the bike, there are other elements to consider when choosing a new steed – the geometry, specification and value for money being key points.

    As an endurance bike, Ewig mountain bike is designed to be comfortable to ride over long durations, but still efficient enough so that you can cover long distances. As such, the carbon frame features a complex mix of tubing shapes, so as to deliver stiffness where it’s needed – such as around the head tube and bottom bracket – and flexibility where it’s not, such as at the seat stays.

    When referring to carbon fibre in bikes, it’s important to understand that the end product is actually a composite material made from the carbon fibres themselves and a resin, which acts as a glue or binding substance to hold and reinforce the fibres together. Far thinner than a strand of hair, the thickness of the carbon fibres vary greatly. These individual carbon fibre strands (filaments) are wound together in a ‘tow’, which is then typically woven into fabric-like sheets. The resin is often the weak and inflexible component of the composite and so the goal is to get the tows bonded as close to each other as possible.

    Carbon fibre used in bicycles is often unidirectional and so the angle at which it is layered is of the utmost importance. Layering the fibre at specific angles will create strength and stiffness in the direction it is needed. For example, if the forces placed on the frame are opposed to the direction of the layup, it becomes strong and resistant to the force. However, if the fibres are layered at an angle where fibres can not oppose the force, it will flex. The key with layering is to create stiffness and strength where it is needed while providing flex in other locations where required – something the industry often dubs ‘compliance’. Other parts of the frame, or just cheaper carbon frames, may use ‘woven’ carbon-fibre, which provides similar characteristics in all directions that it is laid.

    What is the advantage of a carbon bike?

    The primary advantage of the material is that at a given stiffness, carbon fiber is significantly lighter than aluminum, steel, or titanium. This lower density also means carbon frames do a better job of absorbing (rather than transmitting) road vibration, which translates into a more comfortable ride.

    The first thing people think of is the weight, and yes carbon fibre in bikes makes the lightest bike frames. The fibrous nature of the material allows frame builders to adjust stiffness and compliance by aligning the carbon layers in varying ways. and compliance in the seat tube and stays for rider comfort.

    It makes for a smoother, more comfortable ride,The main benefit for non-competitive riders is the comfort of a carbon bike frame,carbon bike fork benefits from vibration damping qualities that give a smoother ride.

    It’s stronger and more durable.Technical improvements in the weave and epoxy, and the ability of designers to build in strength in frame areas where it is needed most, mean carbon can now be used to build a very durable bike frame. In fact, carbon road bike frames have been shown to outperform alloy in lab testing and you can now even buy a carbon downhill mountain bike with good impact resistance.

    It’s an extremely stable material. Carbon fibre road bike frames used to be susceptible to UV damage, but this is no longer an issue as quality frames made these days contain UV stabilisers. Also, don’t worry when using bike wash on your new carbon frame – compared with steel or aluminium, carbon is an inert material and not susceptible to chemical corrosion or salt damage.

    How much does a carbon fiber bike cost?


    Is carbon fiber good for bikes?


    Is it worth buying a foldable bike?


    Is carbon folding bike good?


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