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Trimble Inverse 4 Mountain Bike-1988


With the Trimble Inverse 4, designer Brent Trimble revised a shape that was first popular in the 1800s- the cross or girder frame. In early bicycle design, this shape was rejected as it was considered too flexible; it was quickly replaced with the familiar diamond frame. Using modern technology, Trimble was able to solve the flexibility issues of the design by using a combination of carbon fiber and fiberglass to create a light yet strong frame. The large diameter sections contribute to its stiffness.



Designer/builder: Brent Trimble

Country of Origin: Berryville, Arkansas, USA

Weight: 13154g/ 29lbs.