ABOUT DEMA

In DEMA company, we always try to be one step ahead.
That´s the reason for the ceaseless improvement of
our bicycles, either technical or visual. In the process of
development, we focus not only on the design of the bicycle
and the quality of its components, but also on the functionality
and, moreover, the safety of the bicycle. By our wide range
of bicycles, we strive to satisfy the needs of all performance
categories and age groups – from professional riders to the
youngest bikers. We use the most innovative processes and
the most quality materials in our development process. We also
carefully consider the selection of components and their influence
on the functionality of the bicycle.

The quality of our bicycles is recognized and awarded abroad. We have
received several awards, such as The Design of the Year (RAVENA 3.0)
or The Bike of the Year (SCALEO 9.0). Nowadays, DEMA bicycles are sold
in more than 15 foreign markets. In addition, we have been awarded Slovak
Superbrands Award 3 times, on the basis of the Brand Council decision and
the preference of Slovak consumers.

The numbers of the bicycles made by our company have been rising year after
year, which is the proof of our brand´s rising popularity. Production of 45.000
bicycles has been planned for 2016 season. All working procedures from initial
inspection, production and interoperating processes, final inspection, up to
shipping, are carried out in accordance with ISO 9001 norms.
Our company has received a prestigious prize Best Service Center 2014 at the
FSA distributors´ meeting in Busnag. By this, excellent work of our employees was
awarded in the fields from communication with customers up to the service for FSA.

DEMA RACING TEAM

DEMA Racing Team has been one of the most successful
Slovak cycling teams for a long time. The DRT racers
always set challenging goals which they manage to achieve.
Lots of winnings and prizes are the evidence of their success.
Therefore the members of DRT are the ones who can verify
riding properties, accuracy in construction and functionality
of our bicycles in demanding conditions. Their feedback is very
important for the subsequent quality improvement of DEMA
bicycles.

In 2015 season, DEMA Racing Team riders were really successful.
As for the most important, these were:

At Slovakia Championship´s time trial idividuals, Daniel Pápež finished 2nd in Masters A category. Boris Horváth was 3rd in the same category.
At Slovak Cup - CrossCountry, Barbora Svrčková won in the Junior category. Jaroslav Štvrtecký came 3rd in Masters A category and Václav Bureš was 3rd in Masters category.
Kristína Koscová was 2nd in Masters W2 category in Sellaronda Hero in Italy (60 km track with height difference of 3400 m).

DEMA Technology

Carbon Frames

At present, you can find carbon frames used not only in the top-level models but also in the more affordable bicycles. All frames are made using the Tube2Tube technology,
from high quality, trademark carbon materials from the Japanese Toray Company. The main frame triangle is made of high strength material to ensure optimum balance
between firmness and flexibility. Chain and saddle stays are made of more flexible carbon fibers, specifically for the better absorption of vibrations transferred to the frame
from the rear wheel. Thanks to this, DEMA carbon frames are not only firm and hard but also comfortable. One of the many advantages of carbon frames is the fact that they
offer lower weight and significantly higher strength than frames made from aluminum alloys (3000 to 7000 Mpa).

Alloy AL-6061

An aluminum alloy containing Mg2S silicides as its main
additive is also referred to as Alloy 6061. Class 6000 alloys
are highly workable, weldable, and machinable, which is why
they are often used in the manufacture of bicycle frames.
Thanks to their tensile strength and resulting workability,
tubes made from this alloy are often used in hydroforming
processing. The 6061 aluminum alloy reaches a tensile
strength of 325 MPa and density of 2.70 g/cm3.

Cr-Mo Steel

Cr-Mo is steel alloyed with chrome and molybdenum.
Alloying elements in steel provide increased strength at a
lower weight. Chrome also adds anticorrosive properties
to the mix. Frames made from this material are strong,
durable, and relatively light.
Hi-Ten Steel
Hi-Ten acronym stands for High Tensile Steel. Hi-Ten frames
are just as strong and durable as Cr-Mo frames but
noticeably heavier.

DEMA Custom Tube

We do not use any standardized sets of tubes for DEMA
frames; rather, we adjust tubes (shape and thickness of
walls) to the specific frame based on strength analyses and
the projected design of the entire bicycle.

Double butted Tubes

The main advantage of tubes with narrowed walls (butted
tubes) as compared to traditional tubes, is their lower
weight while, at the same time, still sporting very similar,
almost identical qualities as traditional tubes. Narrowed
tubes usually have thicker walls at their ends, at welds,
and thinner walls in the central, less strained portion. This
type of tube comes with two different wall thickness sizes
(Double Butted, e.g. wall thickness of 1.0 - 0.8 – 1.0 mm).

Heat Treatment

Frames from the 6061 group of aluminum alloys often bear
the supplementary designation T6. In the area of the weld,
the frame is weakened down to level T0. The lost strength
and mechanical properties are restored thanks to heat
treatment, by heating the weld to 130°C for several hours.
After completion of this production process, the strength
of the frame in the welded area is once again T6.

Hydroforming Tubes

Aluminum alloy tubes shaped by hydroforming technology
are formed by the pressure of heated oil. A basic tube
is inserted into a mold through which oil is pumped. The
pressure of heated oil forms the tube to the shape of the
mold. This tube shaping technology is a production process
involving more than 10 operations. Hydroforming tubes are
usually used on the frame, in place of upper or lower frame
tubes. With some frames, a hydroforming shaped tube is
used in place of the saddle tube (especially in the case of
road bicycles).

Biaxial Tube Profil

Use of lower frame tubes with biaxial profile – with vertical
dilation in the area where the tube connects to the head
tube and horizontal dilation in the area where the tube
connects to the central connecting piece – ensures
significant increase in firmness in those parts of the main
frame triangle that experience the greatest strain.

Tube to tube

In frames using this technology, each and every tube is made
individually, shortened to the length required for the size of
the frame, and connected by carbon fiber, thus providing
the advantage of a direct, uninterrupted connection.
Another advantage of the Tube2Tube technology is weight
optimization – observing technological methods, each tube
can be made with a different layer count, thus allowing the
manufacturer to reach the desired frame weight.

Smooth Inner Surface

This technology provides perfectly smooth inner tube
surfaces void of redundant connecting materials, thus
optimizing required tube properties and decreasing the
weight of individual tubes as well as that of the entire frame.

Tapered Head Tube

Tapered head tubes are designed to work with tapered
handle bars, with the steerer designed to be used with a 1.5”
headset at the bottom and 1 1/8” at the top. The primary
advantages of a tapered headtube are to allow for the
greater bearing surface and firmness of a 1.5” steerer and
lower bearing surface while reducing weight and allowing
the use of conventional 1 1/8” threadless stems. More
girth at the bottom of the head tube better distributes
shock force, prolonging the bearing life of the headset. Also
it allows a stronger steering position and improved balance,
giving the rider more control in rough terrain.

Inner Cable Routing

Bicycles with inner cable routing are more elegant
because cabling does not interfere with the silhouette of
the frame. But esthetic reasons were not the only ones
to lead designers to this technological solution. Cabling
is protected from dirt this way and thus provides more
reliable functionality, especially in muddy conditions.

Carbon Fiber Dropouts

All DEMA carbon frames use carbon frame endings, which
not only ensure a better connection between chain stays
and saddle stays but also weigh less in comparison to
duralumin endings used mainly in cheap carbon frames.

High Performance Chainstays

Increased efficiency in the transfer of energy to the rear
wheel is referred to as HP-C. This technology has been
incorporated into the elaborate rear construction of all
DEMA carbon frames.

Comfortable Seat Stays

This description stands for functionally shaped rear seat
stays made of aluminum alloy which – thanks to their “S”
shape – more efficiently absorb and distribute vibrations
transferred to the frame and caused by minor unevenness
in the terrain and thus improve the comfort of the bicycle.

Excentric Chain Stays

The technology of eccentrically shaped chain stays is used
in full-suspension DEMA frames in which the right chain
stay is placed lower than the left one. This technological
solution has been implemented to increase the chain space
and minimize contact between the chain and the chain stay
during the movement of the rear construction while riding
in terrain.

Simple Single Pivot Design

Simple single pivot design attaches the swingarm to the
shock via additional linkage actuating the shock to create a
more progressive leverage ratio between wheel travel and
shock absorber travel. The rear axle is held by a swingarm
which is connected to the frame via a single pivot located
near the bottom bracket. When the suspension moves
through its travel, the path the rear axle describes is a circle
around the pivot point. The advantage of this design is its
simplicity, easy maintanance and good bump compliance.

BB-92

The open standard of the non-threaded bottom bracket
of the BB-92 MTB frames brings 4 basic advantages –
improved strength of this part of the frame, higher durability,
decreased weight and easier installation by pressing the
bearing cups into the frame instead of threading them.

BB-86

The open standard of the non-threaded bottom bracket of
the BB-86 road and cx frames brings 4 basic advantages –
improved strength of this part of the frame, higher durability,
decreased weight and easier installation by pressing the
bearing cups into the frame instead of threading them.

Standard Threaded Bottom Bracket

This threaded bottom bracket technology is used in both
carbon and duralumin frames. All DEMA frames using this
technology feature a 68 mm wide bottom bracket housing
with a BSA thread (1.370 x 24 tpi), also referred to as an
“English” thread.

3D Forged Dropouts

This technology offers the possibility to use heat processed
3D frame endings with interesting shapes. Their advantage,
compared to milled endings, is the increased strength of
the material.

142x12mm Thru Axle

The 142×12 thru axle is a self-centering system that could
be installed easier than a quick release without any tools.
The larger diameter thru axle means stiffer, stronger rear
end of bike and less deflection of rear hub. It provides a
safer method to secure the wheel to the bike guaranteeing
against wheel ejection.

I LOVE. I FEEL. I AM. DEMA

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Source: DEMA