ETRTO 35-355 Schwalbe Art.No.: 11111348 EAN-Code: 4026495473668
http://www.schwalbetires.com/node/1323
http://www.schwalbe.com/ger/de/suche/produkte/ergebnis/?tn_mainPoint=&tn_subPoint=&ID_Produktgruppe=
[url]Bag for Strida SX?]
Fits perfect on my 18" wheeled single - Strida.
These tyres have much more traction than the Kojak’s, which are really dangerous on bad roads.
I bought also Innova’s from G.U.M. some days ago for spare parts, but have not tested them by now.
picture was found here:
[url]Where to sell my Strida SX?]
Thanks, Amuro!
For my feeling is the 18" Strida more stable and less nervous than the 16" version.
(I’m riding alternatively a 16" Schlumpf SD [more] and a 18" SX [less]).
Upgrading a two speed Strida to 18" wheels possibly has a disadvantage:
The enormous gear ratio might not suit all Stridanauts legs… 
Btw, is there any other bike on the market which makes tube- or tyrechanging possible as fast and easy as on a Strida? 