Caster how to add some

[Alan]

The first thing to work out is why it doesn’t have enough caster already, because it should have. Is something bent, worn or in the wrong place? Otherwise, options are to rotate the radius arms which will increase castor. Or, put a spacer behind the radius arm mount on the crossmember, but remember these are a bodge. What you really need is an angled wedge in the spring mount and to drop the radius arm mount to suit.