I am trying to bring in carbon fibe bicycle frames, wheels and parts at affordable prices together with this I will be keeping Shimano XT and 105 parts in stock. Follow the links to find details and indication of prices of the products I can supply this might differ due to exchange rate fluctuations. Delivery time is 3- 4 weeks on Items not in stock. On frames we can order them to have the bottom bracket fitting you prefer and painted with the UIS brand in red/white or white/green or unbranded in different weave patterns see below.  
UIS mountain biking


e-mail: sandtracks@gmail.com mobile:+264 64 811241839
3K
12K
UD
Carbon fibre details

Bicycle components, specifically carbon frames & rims are made using various grades of carbon fiber characterized mainly by their tensile strength and tensile modulus. Tensile strength is the amount of force needed to cause the fibers to break, while the tensile modulus is a measure of the carbon fiber's stiffness.

The cost of carbon fiber goes up with the increase in tensile strength, or increase in tensile modulus. Carbon fiber weave also determines the cost of material with larger weave prepreg (eg.12K) costing less, due to the lower cost of manufacturing.

Carbon fiber layer (prepreg) has maximum strength only along the lengths of the fibers. Prepreg" is short for Pre-impregnated cloth- it just means that the cloth whether carbon fiber, fiber glass, Kevlar, etc is pre wetted out with epoxy.

That is why almost all the inside prepreg are using uni-directional carbon fiber while making carbon rims & frames. The inside layup charts are not identical for example, the orientation are different some are placed at 0 degree, some are 45 degree, 90 degree to the stess points.

This is very important to make carbon rims & frames with good strength & performance. That is also why using uni-directional fiber instead of woven carbon fiber (eg. 3K, 12K) creates stronger frames & rims.

The main use of woven carbon fiber is for appearance but there is one mechanical benefit for 3K when putting it around a hole area it can prevent  delaminating while machining holes.

Woven fiber is heavier than UD fiber the weight difference is caused by woven fiber strands that pass across each other. For rims, the quantity of carbon fiber used is not large so the weight difference of the different weaves is not big +/-15g.

For big product like a frame the weight diffenence between 3K and 12 K is minimal but will be heavier than a UD frame.

Different weaves different ride

3K - 3K is the most common carbon fiber that you will find on a bicycle. It provides a comfortable ride while still allowing the bike to be stiff and strong enough to handle a powerful rider in the midst of his/her best sprint.

12K - 12K is the largest weave and the stiffest. This outer layer featured on the Fascenario 0.8 makes for the stiffest "feeling" ride of all three. It is slightly heavier and much less expensive to use in production, hence the price difference in the Fascenario 0.7 and the Fascenario 0.8.

Uni-Directional - Uni-Directional (UD) carbon is another type of carbon fiber that can be used to create a carbon bicycle. UD carbon has fibers that run the same way rather than being woven together. This carbon is used on the Fenomalist and Aero UD in the Storck line-up and is only used as the outer layer."