I’m planning on doing a road race in norcal, Copperopolis (called the Paris Roubaix of California), that has very rough concrete / gravel (as seen on youtube and read in various comments). I have a 2018 Trek Madone 9.0 (rim brakes and stock wheelset): https://www.trekbikes.com/us/en_US/bikes/road-bikes/performance-road-bikes/madone/madone-9-series/madone-9-0/p/21585/
A few threads I’ve read and videos I’ve watched are recommending 28s w/ lower pressure for the race. The link above has a couple comments asking about 28s on the Madone but Trek responds that they recommend a max of 25. Has anybody mounted 28s or larger on a Madone? Which wheels and tires did you use? Ultimately, what’s the best way to know the largest tires that my bike and wheelset can support?