Anyone know what the seatpost size is on a 02' Marin Rocky Ridge? I've searched and searched, and came up with two different spec sheets for the same (17" 2002). 27.0mm, and 27.2mm. I measured with an older pair of calipers(standard, may or maynot be 100% accurate though), and converted to metric, and came up with 26.8mm.. Anyone know for sure? The guys at Marin aren't to eager to pull out the spec sheets for me.