[steveproracing]

They are wound slightly wider. Perhaps half a mm
It helps them feel a little more consistent and less likely to become coil bound

My car is amazing on grass/astro. I
Tend to run around
Front
4x1.4mm piston 40wt Losi oil
Losi green spring

Rear
4x1.5mm piston. 35wt Losi oil
Losi white spring

Hth