Originally Posted by
wgscott
They did that very tastefully. How wide a tire can you cram in there if you ignore all the official directives?
The recommended 700x38 max is pretty accurate. I don't think you're going to find a road bike with Ultegra that can handle a much larger tire as the crankset limits the bottom bracket width. I believe this is one reason why Shimano introduced the GRX group set.
