Tamiya F102/3 Tyres - How Many Degrees?

[Andysan]

Hi all,

As i am whipping out my F102 to once again run it at my local club, i need some new foam tyres.

I've found these by Zen which are available in both fronts and rears in a variety of different degrees (different hardness?). The problem is that i have no idea how these compare to the Tamiya tyres which are just called "Type A" or "Type B". Can anyone suggest which tyres to use for indoor carpet running to get the best lifespan/grip ratio please?

Also the Tamiya fronts are harder than the rears, so again do i go 3 degrees harder or 10? Thanks!