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Weather-proof EngineerinG. DESIGNED & MADE IN THE UK. FOR THE WORLDS WORST WEATHER. 

The derailleur drivetrain was invented in 1928 and works perfectly fine for road bikes where precision shifting is not impaired by mud sand and more mud.  A lot of design and engineering has gone into improving the rear derailleur, but this system is still exposed to the elements and mud. The derailleur has become the mechanical Achilles heel when long distances and trail conditions turn bad. 

Gearboxes have more long-term benefits for mountain biking than an exposed rear derailleur system. Years of maintenance free cycling. 10000 quite belt-drive miles.  At Olsen Bicycles, I have designed a frame around the Pinion gearbox based on UK hardtail geometry. With the Pinion gearbox and Gates Carbon-drive belts, this frame has both low maintenance and ride versatility. 

OLSEN BICYCLES offers a semi-custom geometry tailored precisely to the customer.  OLSEN Carbon frames are monocoque and are all hand laid.   Each frame uses a combination of UD Carbon and 3K Kevlar/Carbon weave laid into a tool.   I offer advice on geometry options to suit your forks and type of riding that you do. 

The RAM: Long-travel build.

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semi-custom geometry:

for long-travel or rigid forks:

This frame uses the benefits of carbon monocoque construction.  However I have designed the frame to allow for some small changes to create a semi-custom frame geometry:   The "reach" (top tube) can be changed from between 400 - 455mm.
The head angle can be anything from 66 to 70 degrees.  Bottom bracket drop can be changed by changing the mounting plates.

With low-maintenance at the heart of the design, lets break down some of the frames unique features:  Elevated chainstays allow the frame design to use continuous runs of uni-directional (UD) carbon from the axles to the head tube. Elevated chainstays also gives the frame large tyre clearance around the chainstays and chainring. The gearbox is suspended from this structure on some adjustable "swing plates" that also tension the belt. 
This frame will also fit two different wheel sizes, both 29 x 2.4" and 27.5 x 3.0" (plus sized) tyres without affecting the handling.

LONG TRAVEL GEOMETRY:
With a 66 or 68 degree slack head angle this frame can handle 120mm forks with 29er tyres or 140mm forks with 27.5" tyres.  This makes the riding style aggressive and perfect for jumps, burms and table tops at Trail centres.

RIGID FORK GEOMETRY:
With 68 or 70 degree head angle this from feels balanced with 470mm Axle to Crown rigid fork.  This make the bike ideal for bike packing and long distance cycling.  The bottom bracket drop can also be changed by changing to the +5mm "swing plate".

 

The SWAN:
Long-distance machine

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