GT i-drive full suspension frames

minor_LEGEND

Senior Retro Guru
Does anyone have ay info on the GT i-drive full suspension design?

I have been given an i-drive 3.0 by a friend to srvice & get ready for some riding.

It's an ebay purchase, specced with Red Judy's & a mix of XT & LX components & cable disc brakes. I can deal with all the servicing but wondered whatthe deal is withthe floating linkage of the b/b & why it says 'preload' on the b/b shell. Is this adjustable? What for?

Thanks
 
I believe its actually a sag measurement. An arrow is it? The arrows should line up when sat on the bike stationary as i recall.
 
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