I'm planning on going from a 65mm stem to a 90mm to try and increase stability on technical climbs - but the one i'm looking at is 17 degrees rise as opposed to my current one which is probably 6deg rise, will this accentuate or lessen the difference?
It will lessen the difference. You really want to get the front end lower - both for climbing and keeping weight on the front for cornering.
65-90 that's quite a jump, I'd try something inbetween, can you borrow a mates to try?
I was happily riding my On One when a pal pointed out my stem was very short and doesnt that make it very twitchy.
No seems OK to me was my reply...
Ever since I cant get out of my head how twitchy it is, felt fine before he said anything.
My heads been messed with.
No wonder they call them 'A-Head' fitting.!
Haha, I have this with tyres, they're fine untill someone tells me theirs are better.
I ran my 456 with a 90mm stem, spolied it a little. But 65mm to 90 isn't that a big jump, unless you find an 80mm one, but then the difference might not be enough to notice.
I'd just try 90mm, hate it (O-O's are designed arround small stems, they compensate with longer TT's), then go back to 65mm (which is still longer than my 50mm on the 456).
