by istigatrice on Wed May 16, 2018 9:21 am
^If you're reffering to the bicyclerollingresistance website, they test their clinchers with a butyl tube (in general), but they have also shown that a latex tube is faster than butyl, and also tubless. In other words, their 'fastest' tyre is a tubless tyre because their clincher tests featured a standard butyl inner tube.
If they glued their tubulars properly then I'd be willing to bet that tubulars would be faster again (or at least comparable). If I had the citation on hand I would give it, but I recall reading that an american/european group did a test on rolling resistance, and a 'poorly' glued tubular would increase rolling resistance drastically. From their methods with the conti tubular tyres I would take their results regarding tubulars with a pinch of salt (they removed the tubulars and reglued them a few times to repeat the tests). If you glue your tubulars properly then their results won't be representative.
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Disclosure: I'm sponsored by Velocite, but I do give my honest opinion about them (I'm endorsed to race their bikes, not say nice things about them)