Update 21 Oct 2016:
The new design
front Federal Formoza AZ01 165-55-15" tires have a smoother ride, very good grip in corners rain or dry roads;
17# air, I used 10oz "Ride On" sealant/balancer each front tire.
I have over
3,000 miles on new front Federal AZ01 tires 2015 F3S SE6 "Touring mod" Spyder, very good grip/handling, smooth ride.
http://www.newegg.com/Product/Product.aspx?Item=9SIAB0Y48R8175
Rear Yokohama SDrive 205-55-15" tire at
23# air has excellent grip/handling rain or dry roads, smooth ride, good wear (on my 2015 F3S, 15,500 miles).
A good combo front & rear for my 2015 F3S Spyder, or other Spyders.
Another car tire option for your Spyders.
Enjoy your rydes.
Jim