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As thread title really, just bought a new FS frame with a head angle the manufacturer states as 67 degrees with a 140mm 27.5 Revelation.
I've got a 150mm 27.5 Rev laying around ready to go on, I have always understood an extra 20mm will slacken the HA by 1 degree so with all things being equal here what am I looking at with another 10mm of travel?...66.5 HA?....near as makes bugger all difference?...etc etc
I would dare say 10mm on most frames give or take makes little difference.
Slight increase on wheelbase bb height etc
Approx half a degree and 5mm on the bb height.
I could tell when I shortened my Lyriks, subtle but made a difference.
according to Cotic website ( yes not your bike but gives some idea):
On the Rocket changing from 150 to 160mm forks reduces head angle by 0.8 degrees and raises BB by 6mm
on the Soul, going from 140 to 150mm reduces head angle by 0.6 degrees and raises bb by 3.7mm
bear in mind you will run an extra couple of mil of sag...
Ok, doesn't sound too disastrous, i'll get it built up.
Next question:
I've only ever used threaded BBs, this has a pushfit BB, i'm a Shimano fanboy, what cranksets will go in this....SLX double and bash OK?
Just added 20mm on my Trance. Bit lifty on front on steep up, but I've put a shorter stem on too. Otherwise doesn't feel much different. When I'm riding, the forks are almost always in a greater or lesser state of compression so the head angle and bb height are constantly changing.
If you've already got the forks, youve really got nothing to lose.
threaded and pressfit* are the same in terms of what fits in them.
*not BB30 obviously.