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@gbj_tester
For a light race build, everything bar the frame/fork/headset comes to about 4.7kg, so a chassis weight under 2.1kg just means you're going to have to ballast it to pass scrutineering. Pros don't worry about these things, most of the top level track bikes are well over 6.8. IIRC, even Vicki P's sprint bike runs about 7.5kg.