Take note, sizing between Sirrus models varies a bit... For example, in medium:

• Sirrus 6.0, x 5.0 & 4.0 reach: 384 and stack: 631
• Sirrus x 4.0, reach: 382 and stack: 635
• Sirrus x 3.0, 3.0 & 2.0, reach: 398 and stack: 593

Nothing huge, but to some it may play a factor. I'm 5'9" with a 32" inseam (not pants) and I was between a M/L on the Sirrus x 5.0. Went with the medium and it feels great. Easier to "extend" a bike, then to shorten it... within reason.



A medium x 4.0 an

the geometries are not the same. For example a x 4.0 and x 5.0 both in medium have different stacks and reaches.