I can easily hit the drops with my knees on a 140mm stem. Can't say about short people but for lanky mutants that climb out of the saddle it's definitely a problem
I'm only 187cm but have long thighs and have never done that with 130mm stems. Nipped my knees on the back of the stem once or twice though but never on a road bike. They look shit however and I can't solo for toffee so I wont be buying a pair anyway....
I can easily hit the drops with my knees on a 140mm stem. Can't say about short people but for lanky mutants that climb out of the saddle it's definitely a problem