Minimum seatpost in frame?

Boy Lard
Boy Lard Posts: 445
edited November 2011 in MTB workshop & tech
I bought my wife a second hand Trek Fuel Ex 5.5. She loves the bike, the fit is pretty good, but the interupted seat tube means that I can't get the saddle far enough out of the way for her when she's doing something a bit steep or a bit more technical and just needs that bit more clearance to feel confident. There is no minimum insertion point on the seatpost, maybe it's worn off. Is the minimum insertion point specific to the tube though? Does minimum insertion depend on the type of frame? I've read that so long as the seatpost is inserted into the frame so that it comes 1-2cm below the bottom of the weld of the top tube/seat tube that will be safe, is this correct?

Cheers in advance.

Comments

  • nicklouse
    nicklouse Posts: 50,675
    both.

    but 90mm is "average"

    make and model of post would be good.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown
  • 1mancity2
    1mancity2 Posts: 2,355
    I thought 100mm was about right, may be wrong usually am.
    Finished, Check out my custom Giant Reign 2010
    Dirt Jumper Dmr Sidekick2
  • Boy Lard
    Boy Lard Posts: 445
    I think seatpost is the Bontagger SSR 20mm offset. Can I just chop the post with a hacksaw so that , at the maximum height the missus requires the saddle there is still 90-100mm left in frame then?
  • nicklouse
    nicklouse Posts: 50,675
    yep.
    "Do not follow where the path may lead, Go instead where there is no path, and Leave a Trail."
    Parktools :?:SheldonBrown

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