What 2WD Tyres for grass?

[geekster]

Hi guys

Not raced for 15 years...and thinking of doing some vintage racing with a Losi XX.

Used to race a Cougar/Cougar 2000 off road (grass only) with the following:

Front 2.0 inch wheels
Yellow/Green Minispikes (outer row trimmed) or Staggered Ribs

Rear 2.2 inch wheels
Green or Blue Minispikes

Is this still a good choice, or have tyres (for grass) moved on since then?