Hello Strida Fans, I have been riding the last few months with 16 inch Schwalbe Big Apples mounted on my EVO. I love the ride but when the Big Apples are fully inflated the front wheel magnet will not connect with the rear wheel magnet keeper. I solved this by having my friend a machinist machine a aluminum 5 mm spacer.
With this spacer the magnet connects with the tires inflated to 70 psi or 5 bar. Folded the Strida will still roll easy using the spacer.