What's the pedal spindle size for the NordicTrack GX 4.7 R exercise bike? I am trying to find out pedal spindle size for the NordicTrack GX 4.7 R exercise bike. Is it 1/2 or 9/16?

I want to replace the pedals with larger more substantial ones with a strap.

Thank you!
The Nordic Track GX 4.7 comes with a three piece crank so it has 9/16 pedals.