YOU PROBABLY HAVE A LOT OF QUESTIONS. THAT IS NORMAL.
HERE WE ADDRESS SOME OF THE MOST COMMONLY ASKED QUESTIONS AND WORRIES THAT OUR CLIENTS HAVE.
Short answer, yes. There are about 1700 different types of bamboo. Some of them you can eat, and some of them are used all over Asia for making scaffolds on construction sites, or even entire buildings out of bamboo tubes. When producing our frames, we use only one type: Mosso bamboo (Phyllostachys Edulis). This species has many names but most commonly it is known as steel bamboo, tortoise-shell bamboo, giant bamboo or mao zhu. Moreover, Rares, our CEO, has developed in the lab a special oil that we impregnate the bamboo with and it gives the tubes even more resistance over time. This type of bamboo is not a joke. It is the strongest type of bamboo in the world.
The biggest frame only weights 1.8 Kg (about 4 lbs). It is lighter than aluminum and steel, but a bit heavier than carbon fiber. However, the feeling of riding a bamboo bike is truly unique. No other material feels like bamboo. The sensation is usually described by the people who first ride one of our bikes as “incredible smooth” or “it feels like you float with it”.
Our bikes are compliant with the DIN 4210 standard. This is a standard in a bicycle manufacturing. Under normal use conditions, the frames should last about 15-20 years.
Given the fact that they are made of bamboo, can they be used in rain, snow or other harsh conditions?
Yes. The bamboo is treated and stabilized. Also we use a bi-component, scratch and UV resistant, automotive clear coat for our frames. It is the best the industry has to offer. Therefore, our bikes can be used in rain, water or snow, just like any other bike, made from conventional materials. Fun fact… since the frame is more than 90% bamboo, you don`t have to worry than much about a lightning strike.
Indeed, the bamboo is a quite cheap material. But please keep in mind the fact that every bike we make is 100% hand made. It takes about 80 hours of work for the production of a single frame. That translates into two weeks of daily work. Also it takes about six months for accommodating the bamboo and take it to an ideal humidity level. Also, the components represent a big chunk when it comes to the final price. That is because we prefer to equip our bikes only with good quality components. Could we do them cheaper? Of course we can. We could cut the price in half just by saving on components. But then you would have a good quality frame equipped with cheap components. That, in all, means a bad bike that just doesn’t work or feel right. And who you’re going to blame for that? Wouldn’t that be a shame? Also we make our dropouts from stainless steel. That means no protection layer is required on them and they will never rust.Also we produce them in UE, Romania, where the salaries and taxes for every employee are not small. So these are the main factors that influence the final price. Could we outsource the production in other country? Of course we could. But then we would not have that much control over the
production protocols and quality assessment.
Our bamboo is incredible strong so a scenario like this, while possible, is extremely unlikely to happen. How strong is it? Well imagine this: a pole of bamboo of about 5 cm in outside diameter, about 0.8 cm thickness, 4 meters long, can hold a person of about 90 kg without bending much, being supported only at the ends, in a horizontal plane. An aluminum pipe of the same thickness and diameter would easily bend. Now consider that the longest bamboo pipe in a bike frame is a bit less than 60 cm. Can you guess the force required to break that? Well we never tried to find out, but we can tell you that it is A LOT! Also, during the DIN testing, our bikes starting to crack at a bit over than 600 Kg force load at the pedals. We loaded the frame in a jig, without
the wheels, since the wheels would bend like butter under that kind of load. No splinters were observed. Also the torsional stiffness of bamboo is a lot higher that many other conventional materials. So in other words… if you do manage to break a bamboo frame you most likely have bigger things to worry than splinters since it does require a lot of force to break it. It definitely is a lot harder than carbon fiber, that also create splinters. But professional riders don’t really worry too much about this aspect of carbon frames.
Yes, we provide free shipping all over the UE. For the rest of the countries, please contact us, give us your address and we are going to send you a quote for the transportation fees.
The joints are made from a composite material that we obtain by mixing natural hemp fibers with e-poxy resin. Basically we take hemp fibers soaked in e-poxy and wrap it around the joints. There are four layers of wrapping, and each layer has the orientation of the fibers in a different way, for an added structural resistance.
What if a joint is bad and it will come loose or break? Can you be that sure that all the joints are solid?
Making the joints is the most important and the most time consuming part of bamboo frame production. This is why we have a tightly regulated production protocol and quality control, based on the production of hundreds of frames and developed over time. Also, everyone in the production department goes through an extensive training and supervision for three months, before they are allowed to work on a frame by themselves. We never had a bad joint that just failed out of the sudden. Even in the unlikely scenario where a joint is incorrectly made, it usually becomes loose gradually and the rider can feel that something is
not quite right. How do we know this? Well before we came out on the market, we did a lot of prototypes that we tested them to the extreme, in ways that a normal person would never use a bicycle. To that we add the lab tests for the 4210 standards. But we don’t really like to brag too much about that and get into details. All that we did, we did to make sure that you, the user have a good quality product and that you’ll be a proud owner of a Divera bike. This is all that matters to us. The rest are details that only we care about, since this is our job.
Indeed. We tried using ECO resins. But our tests show that we need a resin with a certain elasticity modulus (Young’s modulus), UV resistant, certain curing times etc. Without diving into the fountain of technical details, we could not yet find a proper natural e-poxy resin that meets all of our criteria. You definitely don’t want a joint that is glass-solid and less elastic than the bamboo, as this will in the end lead to premature fatigue. However, the overall carbon footprint of a bamboo bike, even with the e-poxy joints, is way lower than the rest of the frames, made from conventional materials.
We get our bamboo from China, which is where it naturally grows. Indeed, importing it from China would cost the nature some CO2 release. But the bamboo is one of the most efficient plants for converting CO2 into O2 while it is growing. We take our bamboo tubes from mature shoots, that are five years old. So behind every 4 meters long bamboo tube, that we use in our frames, there was a fifteen meters long bamboo shoot, five years old that released plenty of oxygen into the atmosphere.
Mosso bamboo is one of the fastest growing plants on earth. With the right conditions, in it’s natural environment, it can grow up to one meter a day. In fact, Mosso bamboo forests are so effective at growing and regenerating that sometimes they grow out of control. They extend in the cities and their roots can easily damage the buildings by growing under the foundations and crack the concrete. Taxonomically speaking bamboo is a grass. A very fast growing, oxygen releasing, hard and durable grass. Some engineers and architects start to refer to it as being the 21’st century steel, and that is for a good reason. Composite materials from bamboo fibers are also used in aviation as well. That is because they are very light, strong and durable.