The original Trimble Carbon Cross frames were not very durable since the bottom bracket wasn't reinforced. Brent added an additional brace which made the frame stronger and was called the Inverse 4 frame since the new frame shape looked like a "4". In the early 1990's, suspension was becoming more common and required a revised geometry to maintain the handling while coping with the additional length of the fork legs. Trimble used the same main frame but revised the dropouts to accommodate the new suspension forks. Weights were also becoming more important so lightened frames were offered. The model names reflected the maximum recommended rider weight: 140, 160 and 180. There was Unlimited versions of each model which lightened up the aluminum frame bits and added $400 to the cost. This frame is a 140 Unlimited which should have been the lightest version. the serial number is 0001 so this may be the first production 140 Unlimited model. We received this bike with a more modern parts kit so we replaced it with a period Campagnolo Record OR parts kit. More pictures and details on the MOMBAT web page.
The FFB Blog future
5 years ago