Check that your saddle is set horizontally, in relation to the pedals, correctly. If it is too far back, that can increase the reach. DONT set the saddle position to change your reach, but only to set your saddle-to-pedal distance. With the correct sized cranks, you should ride with your knee joint direcly above the pedal spinde (but personal preferance can shift it +- 1cm).
On a medium sized bike, an 6cm stem is about the shortest you can go before the handling becomes unacceptable.
The handlebar design and the type of brake lever can also affect the reach.