Can we just use the wheels of Strida 3 to replace the wheels on Strida 2?
That is a great question Amuro 
… Thankyou for reminding me … YES,
Strida3+ wheels can be used on Strida1 & 2 BUT the axles must also be changed, as Strida3 + uses cartridge bearings. This would give the magnetic wheel clip system. The brake shoes may need to be adjusted or shaved / filed to fit (or use Strida 3 brakes too).