Holland ExoGrid® Bicycle
Our ExoGrid® bikes offer exceptional ride quality in a stunning
high-durability package by combining the best features of high-modulus
prepreg carbon with U.S. milled aerospace grade titanium.
Our ExoGrid® bikes offer exceptional ride quality in a stunning high-durability package by combining the best features of high-modulus prepreg carbon with U.S. milled aerospace grade titanium. ExoGrid® technology combines the best attributes of advanced composites with those of traditional metals.
A high modulus carbon tube with a proprietary mix of longitudinal and bias fibers designed specifically to deliver the desired Holland ExoGrid® ride characteristics is laid up inside the titanium shell. This adds torsional (twisting) stiffness without increasing the bending stiffness to produce a highly responsive but superbly comfortable ride. Multiple layers of die-cut carbon are hand placed within each titanium diamond, increasing the titanium tube’s ability to withstand buckling stresses and protecting the underlying carbon from environmental wear. These carbon diamonds are layered to end up the precise thickness of the titanium tube after curing.
The raw Ti/C structure is heat and pressure molded together using the patented Bi/Fusion™ process that fuses the titanium and carbon into a single tube and produces flush transitions between the two materials. The perfectly smooth inner bore of the titanium/carbon tube produced by this process prevents the fibers of the inner carbon tube from bowing out. This keeps the fibers of this carbon tube straight – important because carbon is anisotropic, only being strong in tension. The excess titanium on the tube ends allows it to be trimmed to any length for a totally customizable fit.
The resulting ExoGrid® tube is lighter and has improved bending/torsion performance than its pure titanium counterpart. A Holland ExoGrid® frame is as durable as titanium, as opposed to a molded carbon frame, which may or may not survive a crash. And while a molded carbon frame may make a good, short-term economical choice, the limited mold sizes also restrict the available frame sizes and geometries. Holland Cycles specializes in building bikes that fit its customers, regardless of what that size is. An ExoGrid® frame offers a custom fit but with superior carbon feel.
The Ti/C ExoGrid® structure has unique vibration damping qualities due to the dissimilar natural frequencies of the carbon and titanium. When these elements are molded together, some of these frequencies cancel each other out, a phenomenon called constrained layer damping. When ExoGrid® is used in substantial bike frame elements such as the top tube, seat tube and down tube, the built frame delivers improved road feel and exceptional ride quality that are unobtainable from a titanium or carbon fiber frame on their own.
An ExoGrid® frame generally weighs slightly more than a molded carbon frame and slightly less than a pure titanium frame. It also delivers considerably more durability (and safety), which is quite useful unless you are a sponsored pro unconcerned with the economics of replacing a damaged frame. And no one rides just a frame – the component choices available for an ExoGrid® can make the built bike weight comparable to a molded carbon production bike.
The ExoGrid® frame construction is also available with the Jet Travel Coupling.