Erhard can be proud!
Today, Carbo-fibre Tec is a 150 employees factory. Erhard invested into a new production tool: a factory that is four times the area of the previous one. The Lightweight wheels represent nearly the half of the annual gross sales, what a jump forward ! The second half is coming from very different application fields such as medical, aeronautics, aerospace as well as racing cars components.
The B site!
These touches make the difference!
Featured at the entrance, Erhard's bikes preview german technology and unveil a new component Carbon-Sports is currently working on. A full carbon caliper should hit the market soon or late. Probably expected for the next fair trades. The brake still is under development though, its shape will be modified. We won't show it in details as it still is a prototype and we were told to keep it silent. Anyway you can have a first look at it on the picture below.
Erhard's bike, Lightweight rear brake...
Carbo-Tec carbon fibre components feature a structural foam under the visible carbon. This increases the strength and stiffness of the whole while maintaining a low weight. The carbon fibers are all kept cooled in a freezer in order to keep their properties.
When the foam skeletons have been wrapped with carbon, the parts are put in their mold under a very high pressure during several hours. The ovens are sometimes very long, we saw ovens up to 10 meters long.
The hand work is required on most parts: scanner arc, forecast station and a race car component
Some ovens are pretty long
Fibers being weaved
The wheel making department is what stunned us the most. We will call this room the "area 51" of Lightweight factory. We obviously have not been able to take any picture of this area, the competitors from europe, america and especially from asia would have been too happy!
Although we don't have any picture to show you, we can briefly explain how a Lightweight is made.
Basically, the carbon fibers of one side of the wheels are placed in a mold, the spokes are wrapped around the hub then tight with an extreme strength through thumb wheels.
This procedure is similar for the opposite side, while the foam structure takes place in between. The whole receives pressure and heat from an oven, then the paint, sanding and truings finish are all set by hand.
Regarding the clincher version, the manufacturing seems different, it looks like it's made in two parts. The first one includes the hub and its spokes, while the second includes the rim and its clincher bed that is a carefully hand placed with strength. This bed ensures the pressure and impact resistance of the rim, 8 layers of carbon are required for this before the wheel is put in the oven.
Cut rear wheel
Truings and repairs are performed in a different room. When leaving the molds, the wheels are normally very true but in some cases it remains some lateral deflection. Still warm, the wheels are put in a truing stand and are trued by hand while pushing left and right onto the rim! This is a true artisanal work.
The post production truings are made possible while warming up the rim to put it straight again.
Wheels to be repaired
Special truing stand
Lightweight team also performs tests both for quality control and development of their next products.
This is a rim cut for inspection:
Lightweight constantly tests new wheels. After a wait of several years, the clincher version of the full carbon wheel and the rear derailleur finally are available in very small quantities, and high price tag. It looks like the brake calipers may see the light the next year too.
We had the chance to see, in the meeting room, a wheel featuring what seemed a new technology. Indeed it only had 6 spokes meaning these are not double spokes from rim to rim anymore. They probably are independant from each other, which may result into new wheels someday...