Stiff, Light, Smooth – Pick Three
At Boo, we handcraft bicycle frames using the finest bamboo in the world. Our Tam Vong bamboo, nicknamed ‘Iron Bamboo’, is stronger by weight than steel. It’s so strong that it’s used to build bridges and multi-story scaffolding in Vietnam, where we grow this special species of bamboo ourselves on a private plantation.
Building performance bamboo bicycles is an intensive and lengthy process. But if done properly, the rewards of crafting bikes using this amazing material can be great–producing bicycle frames that are the best of both worlds: stiff and durable, nimble and confident, lively and smooth.
Read below to learn more about what goes into building a Boo.
Bamboo is a composite material, meaning it is made of multiple substances whose properties combine to create something with unique traits.
The two materials that make up bamboo are lignin and vascular bundles. The lignin is a fleshy material that insulates and contains the vascular bundles, which carry water and nutrients. These bundles also become extremely stiff and strong after curing.
As a result of its dense and fibrous vascular bundles, bamboo is incredibly stiff. It is also excellent at damping high-frequency vibration because of the fleshy lignin. An extremely stiff material which absorbs harshness…sounds like a brilliant material for a bike frame!
Things get even more interesting. Bamboo’s vascular bundles are entirely unidirectional, along the length of the tube (longitudinal). The fibers have a Young’s Modulus (stiffness against bending) similar to carbon fiber, but are not as stiff in torsion (rotational torque).
When out of the saddle sprinting or climbing steep grades, the entire frame is put in a lateral-bending mode and the bamboo excels at resisting this bending, and thus transfers maximum power to the road.
When cornering, descending, or riding in very rough terrain, the front half of the frame is under torsion, and the bamboo allows for additional compliance in these circumstances. As a result of this torsional forgiveness in the material, cornering is a treat. The bike feels stable and secure, providing greater confidence in treacherous conditions and at high speeds.
Bamboo’s final unique property is a rising rate of stiffness, as measured by its Young’s Modulus. The “snap” that bamboo is famous for comes from this very trait, and is why a bamboo bike frame feels lively. There is an initial amount of give, where a smaller load application results in deformation of the material. But as the load increases, the deformation increases at a slower rate. This progressive stiffness gives the rider an initial compliance found in plusher bikes, but stiffens up quickly like an all-out maximum stiffness race bike.
With a stiff, lively ride that is also supple and compliant, bamboo allows the rider to have their cake and eat it too.
Bamboo vs. Carbon
Bamboo and carbon fiber are both composite materials. In fact, a Boo is over 30% unidirectional carbon fiber. They are surprisingly similar materials, considering one is natural and grows from the ground while the other is synthesized in a factory.
The unidirectional vascular bundles that make up a bamboo tube are extremely stiff, on par with carbon fiber, but their lower torsional stiffness provides more front-end compliance when descending at speed or riding through rough terrain and singletrack.
The acceleration and efficiency of bamboo and carbon are very similar–some riders cannot tell any difference in this category. Bamboo climbs very quickly and accelerates and sprints like the best carbon bikes. However, its additional vibration damping (due to the bamboo’s fleshy lignin) and progressive stiffness combine to create a bike that is more supple and comfortable, without giving up speed and performance.
Bamboo is significantly more durable than carbon fiber, but it also weighs more and is denser. While a bamboo frame may add weight over a superlight carbon monocoque frame, Boo can boast that it has never had a single tube or joint failure in its entire history–including car accidents! Compare this to any carbon frame and you’ll realize the benefit of a little additional static weight is that a Boo frame will last.
Bamboo vs. Titanium
As an “investment bike” titanium is without equal. We believe a Boo frame is the closest thing to a high-quality Ti frame in terms of longevity. They are both long-term purchases meant to outlast all of the components that are hung on them.
Titanium is a homogeneous alloy, not a composite. While it has multiple metals in varying amounts, they are mixed together in a random nature–not arranged in a strict unidirectional composite structure like bamboo. Therefore the feel is not as complex–Ti has a bit of spring to it, like bamboo, but its stiffness is not as progressive and thus a Ti frame will not be as stiff or efficient when really pushing.
The supple feel and forgiving nature of Ti is quite similar to bamboo, but when speaking of an all-out racing bike, bamboo is a superior material.
Bamboo vs. Steel
Steel is real. This phrase originated when riders felt “connected” to the road and trail when riding steel because it transmits the sensations coming from the wheels without being overly harsh. The communicative nature of steel coupled with its lively nature has ensured its popularity as a bike frame material for over 100 years, having been used in some of the first bicycle frames in the world.
Bamboo transmits slightly less from the road and trail, due to lignin’s amazing damping capabilities. But its lively, springy nature shines and makes it similar to steel in this regard.
However, again as compared with Ti, bamboo will far surpass steel in both stiffness and weight. While steel has a classic nature and harkens back to historic times of the sport, bamboo has much of the “life” while providing greater performance, on-road and off.
A more perfect union of bike and rider
Every Boo, Aluboo, and Alubooyah frame is built by hand. We go to extraordinary lengths to ensure your frame is tailored to your riding needs and built to the highest performance, quality, and durability standards.
Aluboo and Alubooyah frames are built using a lugged construction method. Poles with a slightly-larger diameter than our aluminum lugs are selected. The ends of these inserts are ‘turned down’ and textured for a nice flush fit, and aircraft-grade epoxy secures the bamboo inside hand-welded 6061 aluminum lugs.
Boo frames are built using tube-to-tube construction. All of the frame’s bamboo tubes are hand-cut and chiseled to fit together perfectly before being bound with unidirectional carbon fiber. Tubes are hollowed to a 3-5mm wall thickness for weight savings and stiffness tuning. The average Boo frame takes 40-50 hours of labor to construct.
SL frames are available on a custom-only, made-to-order basis. Rider measurements, component specifications, and riding objectives are integrated into a custom BikeCAD geometry which, in addition to a number of innovations that increase frame stiffness without sacrificing ride quality or weight, combine to produce our best frame yet.
We want to tell you about splitting. Bamboo will naturally adapt to its environment, and sometimes it will form a split in the tube.
This is a natural process like a custom timber-framed home in the mountains or a leather saddle breaking in after thousands of miles. It’s something we limit with our post-harvest treatment process and by using the finest bamboo in the world, but it’s definitely common and NOT a structural concern in the least. The reason is because when a split occurs the bamboo’s super-strong fibers all remain intact.
However while splits are normal and may occur, it is important to seal the splits from the elements to keep moisture from penetrating the frame and causing larger issues (and voiding your frame’s warranty).
If you have a split, call us at (970) 444-2228 or email us at email@example.com and we’ll send you a repair kit. It consists of wood filler, clear coat, and various sand papers. Please see the video below to learn how to properly seal a split on your frame.
Boo bikes have a long and successful heritage in races, from road to cyclocross to mountain. Take a look at the results–they speak for themselves, with numerous podiums and wins in major professional events.
Here at Boo, we believe racing is the truest test of man and machine. While too little emphasis is often placed on the former, the latter is still extremely important. Riders competing at the top demand perfection in their equipment. It must stand up to incredible abuse and not fail when the pressure is on.
Our first year as a company, in 2009, we raced a full UCI cyclocross season with seasoned professional Tyler Wren. In the years since, cyclocross has been our number one proving ground because it’s simply the most demanding discipline in cycling. Equipment is routinely thrashed and literally explodes under the pressure, from taco’ed wheels to frames snapped in two. Our frames have performed with flying colors, taking incredible abuse and providing supple control throughout.
Our full cyclocross seasons have been complimented by National Race Calendar events on the road and endurance mountain bike races like the Leadville Trail 100. These professional events provide a testing ground for new geometry, bamboo treatments, carbon layups, and component integrations.
James Wolf, Head of Production
Nick Frey, CEO
Drew Haugen, Marketing
Ben Castaneda, GM
Boo, Aluboo, and Alubooyah frames are warranted by Boo Bicycles, Inc. (“Boo”), 1750 Laporte Avenue, Fort Collins, CO 80521.
This limited warranty covers only Boo/Aluboo/Alubooyah bicycle frames purchased directly from Boo or from authorized Boo dealers in the United States. If you purchased your Boo/Aluboo/Alubooyah outside of the United States, the specific warranty will be governed by the law of the country in which it was purchased.
Boo warrants to the original owner that the frame shall be free of defective materials and/or workmanship as follows:
- All Boo frames for ten (10) years from the date of purchase
- All Aluboo and Alubooyah frames for five (5) years from the date of purchase
- Custom paint/finish for one (1) year from the date of purchase
Dings, scratches, and other damage to the paint/finish of your frame due to normal usage and wear and tear is not covered by the Boo Limited Warranty. Touch-up paint is available on request for a reasonable charge.
If your frame experiences paint or finish failure (paint or clearcoat flaking off of the bike), it may be eligible for warranty repair or replacement.
The Boo Limited Warranty applies only to Boo, Aluboo, and Alubooyah frames. Any component warranty claims must be made directly with the component’s manufacturer.
NOT COVERED BY THIS WARRANTY:
This limited warranty will be void in the event of, and does not cover:
- Normal wear and tear
- Cosmetic splitting (see here for more information)
- Defects, failures, or malfunctions that result from:
- Abuse, misuse, alteration, modification, accident, neglect, downhill racing or stunt riding
- Improper assembly, installation or maintenance
- Improperly repaired/sealed splits, or
- Other abnormal, excessive or improper conditions or use.
*Damage due to normal wear and tear can be repaired for a reasonable charge.
Bamboo is a natural material and can occasionally split, depending on the climate in which you and your bike live. This is normal and should be expected, to a small degree, over the lifetime of your frame.
These splits are cosmetic and do not affect the structural integrity of your frame.
However, while splits are normal and may occur, it is important to fill the splits and seal your bike’s tubes from the elements to keep moisture from penetrating the frame and causing larger issues (and voiding your frame’s warranty).
To request a split repair kit, please email firstname.lastname@example.org
WARRANTY SERVICE PROCESS
- Email email@example.com a short description and photos (if necessary) of the problem.
- If Boo determines that the Boo/Aluboo/Alubooyah frame you purchased is defective and the defect is covered by this limited warranty, Boo, in its sole discretion, will either repair or replace it at Boo’s cost with the same or comparable model.
- You are responsible for shipping charges associated with the repair or replacement of your Boo/Aluboo/Alubooyah frame.
THE EXCLUSIONS FROM THIS LIMITED WARRANTY The only remedies you have against Boo for a defective bicycle frame are those described in this limited warranty (i.e., repair or replacement of the bicycle frame, at Boo’s option). ANY AND ALL OTHER CLAIMS YOU MIGHT OTHERWISE HAVE FOR DAMAGES, INCLUDING, BUT NOT LIMITED TO, INCIDENTAL OR CONSEQUENTIAL DAMAGES, ARE EXPRESSLY EXCLUDED UNDER THIS WARRANTY. THIS IS THE ONLY WARRANTY THAT BOO MAKES ON ITS BICYCLE FRAMES. ANY WARRANTIES THAT MAY BE OTHERWISE IMPLIED BY LAW, INCLUDING, BUT NOT LIMITED TO, ANY IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, ARE LIMITED TO THE DURATION OF THIS LIMITED WARRANTY. No Boo dealer, agent or employee may enlarge or modify this limited warranty, and Boo makes no other warranty except as stated in this limited warranty.
SAFETY AND MAINTENANCE Bicycle riding is an inherently dangerous activity and the bicycle rider is assuming that risk. Proper care and maintenance of your Boo/Aluboo/Alubooyah frame is your responsibility and can reduce the risk of injury.