Can I just ask why you have a bumper held on by carbon tape on the seat-tube?
Is it because the shock is too long? Or is the shock correct length but the bumper is just in case it hits frame?
I have 3 different Marin bikes of roughly same year, Wolf Ridge, Wildcat Trail and an East Peak. They are different sizes as they are my wife and daughter's bikes. All have a space of around 5mm between end of shock and seat-tube with shock fully extended. The shocks are 3 sizes, 165mm, 185mm and 200mm i2i.
Only asking as I'd not like you to damage such a nice bike with repeated hits on bumper. :cry: