I recently switched from a 2011 Rig to a 2011 Hifi and I feel a little cramped. Both are 19in but they have slightly different geometry. The effective top tube length of the Rig was 5mm longer than the Hifi and the stem was 5mm longer. Is 1cm gonna make that big of a difference. The Stem I have is 105mm so its either a 110 or 120, but my concern is changing the responsiveness of the steering. Any suggestions or advice would be helpful.