Whoa - The facts
OK, here goes....
QBP owns Salsa. That's not a secret. What isn't clear though is the management of the websites. Salsa and QBP report geometry differently. Here are the facts and why.
Mamasita is offered in 4 sizes. Small, Medium, Large, X-Large. The rough equivalent sizes are 16", 18", 20" and 22" respectively. QBP's website needs to put equivalent sizes in so that it fits in a nice little table. Since QBP distributes many brands and we all size our bikes differently, it can look like there is different information.
Salsa catalog and new website (coming soon) show size and then show the corresponding overall seat tube measurement. OAL is the length from the center of the BB to the very top of the seat clamp. This measurement is typically about 2" above the actual seat tube and top tube junction.
So to recap,
Small = roughly a 16" with an 18" overall seat tube length
Medium = roughly 18" with an 18.7" overall seat tube length
Large = roughly a 20" with a 20" overall seat tube length
X-Large = roughtly a 22" with a 22" overall seat tube length.
A Small has an 18" overall seat tube length while the medium has an 18.7" OAL. Why is there only a .7" different difference between the Small/Medium and a 2" difference between the other larger sizes? I'm glad you asked. We chose to make the small and medium sizes compatible with two water bottles. Many mfg don't do this and we still want two mounts on our bikes whenever possible. Our bikes are perfect for endurance type events, 100 milers, adventure racing etc and we believe two mounts are better than one.
I hope this helps.
Jason
