Our Tech Report on frame stiffness in VeloNews issue 5, "Flexing Their Muscles," contained two errors, one of measurement and one of protocol.

We incorrectly reported the weight of the Specialized S-Works Tarmac 56cm frame. The correct weight of this frame is 989 grams, or 2.180 pounds.

The suitability of the 1999 Trek OCLV frame we used for comparison purposes was called into question at the conclusion of the test. Our intention in including the Trek was to use it as a well-accepted benchmark for carbon frame performance, prior to the recent push to develop ProTour frames that weigh less than 900 grams (see "Road Frames Version 0.9" in the 2006 VeloNews Buyer's Guide for the complete story on these frames). The Trek frame performed very well in the tests. However, while reviewing the results at the conclusion of the tests, we found a disconformity with the predicted correlation, indicating that the frame may have suffered a delamination of the bottom bracket threaded insert into the carbon shell at some point in its service life. While we noted this discrepancy in the text of the article, we should have excluded the frame from the test until the condition of the frame was verified.

VeloNews regrets the errors.