I’m fairly certain that the offset variations are done at the crown, so that the lowers can be common between the various models as they’re much bigger parts. Much of the offset comes from the forward position of the axle on on the lowers though.
Could be, I probably spoke outside the envelope of my knowledge there.
That link makes no sense though. You’re talking about decreasing trail by 5% and increasing wheelbase by less than 0.5%.
The first comment on the page says “the explanation is good, but the wheelbase issue is a specious argument (IMO). Pull out a ruler and look at how much 5 mm would change your wheelbase — essentially none. However, trail is a trigonometric function so small changes in offset can have profound effects on trail and, consequently, handling. I humbly suggest that any difference felt between two fork offsets is due to changes in trail and not wheelbase.”
I don’t know either way myself, just cut and pasting.
@chest my Pikes are 46mm, run at 140mm on a 29er HT, which should put the head angle at 67 degrees. Anyway whatever it is, it works well for me. I’m in Surrey Hills if you want to try before you buy.