There are so many quality stems now at good prices. I was researching a 70 mm stem to replace the 80 on my bike, when I came across the Kalloy Uno Stealth stem. It weighs about 90-100 grams for a 70 mm, and you can get one for $50 or less. I know some associate Kalloy with "cheap", but my experience with Kalloy products has been good. So, for a few bucks you can try out a shorter stem with no real regrets if it doesn't work out.