Rear Trailing Arms - Red Polybushes

[Bainzy]

Why is it recommended to use the hardest possible bushes in the rear trailing arms on a swing spring setup? Ie what
effect does this have on the behaviour of the wheels/suspension...

[bob dunn]

i fitted the blue ones , because of very bad roads in galway

[drofgum]

Bainzy,
On smooth roads the hard bushes prevent fore and aft motion of the wheel due to compression of the bushes which leads to rear wheel steering. The rougher the roads the more the hard bushes cause twisting loads in the trailing arm and its mountings.
                                                                    Cheers,
                                                                    Paul

[Bainzy]

cheers Paul! exactly what I was after.

Bob, not sure roads in Bradford are much better! Not surprising when UK pothole budgets got diverted to 'road safety partnerships', and was spent on making roads WORSE with humps instead.

I think I might go for red ones in the front ARB mounts too, as I would've thought you want the bar as stiff as possible - is this logic correct?

[bob dunn]

mine work fine on smooth roads too , blue ones easy to fit .