i just did exactly the same as the op. i got a shim for my smaller bars which cost me like £4 and i will see if this 110 to 90mm stem change is enough. if i need to get a compact bar that will be the next step.
unfortunately it has been raining non-stop since the stem was changed and i can't say if 110 to 90 was right. surely 20mm shorter should feel different right?
__________________
coasting, few quotes are worthy of him, and of those, even fewer printable in a family forum......quote 3alarmer
No @coasting, you should stay 100% as you are right now, don't change a thing....quote Heathpack