Bikes » Road » Sport/Performance »


Editor's Review
Do you think this product should be reviewed?

Not satisfied with simply creating
lightweight bikes, BH Bikes set out to create the ultimate in
lightweight bikes that also provides the ultimate in ride
characteristics. After all, what does it matter if a bike is lightweight
or stiff if it doesn’t ride well enough to be enjoyable all day... day
after day?

Our Ultralight is not just light- with a sub 750gm weight for a painted
56cm frame, it is the lightest production frameset in the world and
still exceeds the benchmarks of all the major world class brands.
Climbing and sprinting have never felt better or easier- with such an
amazing stiffness to weight ratio, acceleration in or out of the saddle
is instantaneous.

Some might call our pursuit a bit “obsessive”, but it’s obsession to details that makes a BH, a BH.

Built from the inside, out

The Ultralight is built using a proprietary hollow core molding
technology that sets the bar well above everything else that’s out
there. Other high-end brands utilize previous generation molding
techniques, but we’ve taken our molding technology to the next level of
development to produce a frame that is unmatched in nearly every
conceivable category.

The quality of the frame that exits the mold is near perfection inside
and out, requiring little to no finish work prior to painting. It’s a
shame we have to paint them at all. Other frames require hours of work
after they come out of the molds, filling the voids and imperfections
with epoxy filler which not only adds weight but can also compromise
strength and stiffness in critical areas. Our hollow core internal
molding technology produces a much lighter and stiffer frame because
there is less material required to fill imperfections. This also
produces a better ride because an ultra precise carbon layup can be
optimized and tuned to provide the perfect feel without needing to worry
about adding extra material. 

The Ultralight requires less material to achieve target stiffness
numbers - meaning a lighter frame with greater stiffness and much higher
quality structures. All of this combines to produce a frame that goes
above and beyond the engineering to create a bike that is much greater
than the sum of its parts.  It’s a ride that defies logic in its ability
to deliver stiffness, precision, and superior ride quality in a frame
that weighs 100 grams less than the water bottle on your down tube.  

Pressure and Control

All Carbon bikes are not created equal. A nice looking frame on the
outside does not tell the story of what’s going on inside. Without
giving away too many secrets, we can tell you a little bit about how
carbon frames are molded and what sets the Ultralight apart;

Traditional molding is done with standard polybag bladders. Basically,
plastic tubes (similar in material to a plastic zipper sandwich bag) are
placed inside the frame and inflated with pressure, while the carbon
frame is in the mold and being heated.  The pressure from the polybags
pushes the carbon into the mold, creating pressure from the inside that
results in the material following the form of the mold and creating the
final shape of the carbon frame. This is how the vast majority of carbon
frames are made and there is nothing wrong with it- it is simply not a
very precise process.  Pressure may not be constant in all areas,
resulting in internal wrinkles and weak spots that require the
manufactures to compensate for this with the use of more material in key

Some of the more advanced companies with lighter frames in the market go
one step further and use pre-shaped bladders (the internal bladders are
made to the shape of the actual internal structure). This method is
better, as it helps eliminate wrinkles, but there is still a possibility
of inconsistent pressure in areas of the frame.

Our system goes well beyond all of this and eliminates the possibility
of inconsistent pressures, provides the highest levels of compaction,
and overall better control over the entire structure.  The other key
part of this is that we also have greater control over each of the
individual carbon layups that go into each frame. This is another
attention to detail item that sets the best apart from the rest. The
“kitting” of composites is more on par with making a precision road fork
layup, where tuning is critical to the ride, and strength is
paramount.  With the Ultralight, or any of BH’s top end models, it is
not a matter of taking sheets of mid modulus composites and placing them
at 45 degree angles in the mold like many other manufacturers.  A ton
of testing goes into exactly which composites are needed in each
location and what type is to be used to optimize the frame. So, although
it makes for somewhat fascinating reading to throw out material names
and quote crazy high pressures for marketing purposes, the real magic
happens in product development. It’s a result of the engineering,
testing, and the “obsessive” drive to devote the time, effort and high
cost involved with developing the layup structures that use all the best
materials available in just the right places that creates a truly
Ultralight frame with no rider weight limit, incredible climbing nature,
cornering and descending manners, and a ride feel that makes you wish
the ride would never end. 

How we got there

In the creation of the Ultralight, we didn’t just rely on FEA programs
or engineering data alone- we tested the frames in the real world with
real riders. We built numerous versions of the frame, each with a
slightly different layup schedule- producing more stiffness, less
stiffness and ultimately the right stiffness. We changed the layup and
the materials until we were happy with the ride characteristics as much
as the test data. Though test data is not the only thing we look at, we
do spend a lot of time crunching the numbers and comparing them to those
of the other premium brands in the peloton. We’ve taken the industry
leading performance of the G5 and ramped it up to create the ultimate,
no-compromise racing platform. The end result is a frame that actually
lives up to the words “laterally stiff, yet vertically compliant”.

Using a custom blend of the finest carbon from Toray, we were able to
produce a frame that not only beats our previous best numbers for weight
and stiffness, but also rides incredibly well for hours and hours (and
days) on end. This level of commitment to testing- both in the lab and
on the road- is expensive and time consuming, but when you are working
to create perfection, nothing else will do.

Geometry: Fit and Handling

Weight alone should never be the deciding factor when selecting a bike. A
low weight looks great on paper, in magazine reviews and catalog specs,
but weight means nothing if the bike doesn’t fit and handle confidently
in all situations. This is one of the many areas where the Ultralight
really shines. Being a Spanish bike company from the Southern Pyrenees,
we are quite proud of the fact that some of the most famous climbs in
the world are in our own backyard. It is also no surprise that BH Bikes
has a long history of building incredible race winning bikes for some of
the world’s greatest climbers.  It goes without saying, just as we have
the steepest climbs, we also have some of the world’s most exciting
descents. This heritage has helped us develop bikes that make you feel
like a hero on the climbs while keeping your heart rate intact on the
way down. How do we do this? The Ultralight features shorter than
average 402mm chainstays. These are not the cookie cutter 410-415mm
stays found on most high volume production bikes. Combined with an ever
so slightly slacker seat angle (about ½ degree), the rear wheel is much
more tucked in under the rider allowing for immediate acceleration and a
connected feel to the bike not found with other brands.   The result of
this design is a slightly shorter wheelbase as well. We counter this
with a ½ degree more relaxed head angle and precisely tuned 300 gram
fork to create one of the most stable feeling, yet nimble handling bikes
in the peloton. In addition to tuning the handling, the fit has been
developed through decades of fit experience with riders of all levels.
The Ultralight is offered in 6 frame sizes with individualized geometry,
frame stiffness, and ride tuning per size.   

Technology that doesn’t just stop at the frame

To develop our new frame design with the incredibly high stiffness goals
that we set at the beginning of the project, we needed something more
in the way of component design to achieve our goal of building the
ultimate frame. The result was an over 2 year development project with
FSA to develop the future of frame, bottom bracket, and crank design.
Combining the best features of BB30 and Pressfit 86, we created an
entirely better way to manufacture high performance frames. BB386EVO
uses a wider 86.5mm bottom bracket shell width and a 30mm crank spindle
to achieve frame and crankset stiffness numbers that exceeded
expectations. The wider and taller bottom bracket shell size allows for
more material at the area of the frame that benefits the most from it.
This means that the chainstays can be taller, and the seat tube and down
tube can be larger where they meet the BB, increasing the stiffness of
the entire rear of the frame significantly. This also allows room for
the increasingly popular wider rim sizes being ridden in the peloton.
The all carbon bottom bracket shell is lighter and stiffer as well,
allowing us to create a sub 750 gram 56cm frame. Not only is the
BB386EVO system a dramatic improvement in bottom bracket technology,
it’s also adaptable to the vast majority of cranksets. Larger bearings
fully housed within the frame create a stiffer platform, as well as
extended bearing life. The cross compatibility with multiple crank
designs gives riders more drivetrain options. It’s not just a better
bottom bracket and crankset design- it’s a significantly better frame
design as well.    

Share this product
Average User Rating

From 0 user reviews

Product Options
CompareCompare Now
Quick Specifications
Brand: BH
View Full Specifications
List Local Bike Stores within of:
Jenson UsaStocks this brandContact Store
Read Awesome Articles Now on BikeRoar
Now comparing:
    Clear all