Stance is measured from the center of one pedal body across to the other. Therefore, the length of the pedal spindle affects your stance.
The longer the pedal’s spindle, the wider your stance, because it will place your pedals further from the bike’s center-line – and vice versa for shorter pedal spindles.
It’s important to note the spindle length when buying a new set of pedals. Spindle length is measured from the center of the pedal body to where the pedal spindle meets the crank arm. For road pedals, spindle lengths in the mid- to high-50 mms are common.
You will see Spindle length being referred to as Q Factor in many power meter pedal specifications. We refer to spindle length as Q Factor in our comparison chart.