Originally Posted by Jonathan Bradbury
The ''glaswegian insert'' on the M5 seems to do very well on grass with an even and smooth surface.I'll bet any Arx450 owner will concur. As Gartenzweg was speculating about hard inserts being the best way on road, so I suspect nice flat grassed ground (eg Millenium Stadium, Cardiff) would be best with a rock hard insert.
The problem of course is all the little stones, that scaled up, become huge monsters! That's where this thread belongs. Finding what works in less than Savile Row Pressed surfaces.
The truggy insert is not rock hard by any stretch.
It is however slightly stiffer and more resistant to roll than the std insert. This is why I say it would be best suited to higher traction conditions. It still handles bumps and rocks quite well, I just prefer a slightly softer feel. I'll keep searching and maybe try a HPI one next.