Road bike sizing help
Looking to get a Wilier GTR and my height is 174cm, inseam at 81cm.
My old bike's effective top tube is 545mm and I use a 100mm stem with a 172.5mm crank arm.
For this new bike, it comes with a 170mm crank arm, 100mm stem. The size I am looking at is the S size, which gives an effective top tube of 523mm.
Does this new bike fits me well, if i plan to install a 120mm and slam the stem?
Or should I go for a M size, which gives 537mm effective top tube and a 100mm stem?
Between these 2 sizes, the M's head tube length is 145mm compared to the S's head tube which is 115mm.