At 178cm I'm also always between M and L on the sizing charts, here is my two cents: Going back to 2014, my YT Capra was a Medium, and the reach ( just checked ) was only 422mm; I was then a medium also by their sizing charts. In the last decade and a bit, bikes didn't only get longer, but the sizing charts usually also send us to a larger size, so if I follow some recommendations, I should be riding an L bike on most manufacturers which will usually have now 475-480 reach. That's a big change! Since...