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I have a 28mm Pro One mounted on a Light Bicycle U 65 rim (https://www.lightbicycle.com/65mm-deep-carbon-700C-25mm-wide-road-rim-clincher-U-shape-tubeless-compatible-with-high-TG-resin-surface.html) that I could measure tonight?
My 25c Schwalbe Pro-One tyres are almost 29mm at ~ 70psi on a 20mm internal width rim (SL23 v2). Does anyone know how wide the 28mm version of the 2017 (herringbone tread) IRC formula pro RBCC comes up at the same pressure on a similarly sized rim? Thanks.