I was wondering how changes in fork height effect frame geometry and handling. I have a GT I drive FS (2001) that came with a 80mm travel fork. I have a 100 mm travel fork that I might put on it. The new fork is about 1/2" taller than the old fork. If I put the 100 mm on the i'drive I was thinking about putting the 80 mm on a 94 steel hardtail I have that has a RS quadra 21 with hardly any travel and quite a bit shorter. Will changing the fork height-travel noticeable effect the feel of the bikes? I know this is the case trying to put a suspension fork on and old bike designed for a rigid fork.