I have an older bike that I've only recently started using, got it serviced by the local bike shop, but the rear (disc) brakes still can't stop the bike - They slow it down, at best.
The front brakes seem (overly) powerful in that half a pull of the brake lever will stop the wheel, but the rear brakes slow the bike down slowly even when fully pulled.
Is there a way to adjust the tension required? Also, is this by design, or a problem?
The bike has mid-1990s Shimano Deore XT levers.