new stem advice

aripallaris
aripallaris Posts: 294
edited July 2011 in Road buying advice
so im pretty sure im going to go for a new FSA OS115 stem. just trying to decide on the correct length. my current bontrager is a 100mm when measure from the center bolt to the clamp bolt (came with the bike).

i do feel like im having to overstretch a little to hit the brakes properly. the question is should i go for a 90mm or an 80mm? would the difference be huge?

ari