Jan Ullrich uses a Limar aero' helmet. It seems to be as aerodynamic as any out there, but offers little protection. It's made of plastic that is probably no thicker than a common two-liter pop bottle.  |  Photo: L. Zinn
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Jan Ullrich uses a Limar aero' helmet. It seems to be as aerodynamic as any out there, but offers little prote ...
Jan Ullrich uses a Limar aero' helmet. It seems to be as aerodynamic as any out there, but offers little protection. It's made of plastic that is probably no thicker than a common two-liter pop bottle.  |  Photo: L. Zinn
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