Thread: Cranked trailing arms ... articulation?

Originally Posted by Tikirocker

Can anybody set me straight about cranked radius arms and articulation? In a case of my County 110 with 2" lift, is there any benefit to be had in the articulation stakes by my fitting cranked arms?

Simon.

yes when you fitted the 2'
lift you made the arms think that the axle was droped so yes you need to fit cranked ard plus when you life it it make the axle move fowoard and moe the prop angel
''
'

Top,

The previous owner did the lift, not me ... right now the arms are standard. I am about to do a completely renewed suspension set up and I am wondering if fitting cranked arms will add to the benefit I am seeking in flex?

Simon.

yes it will all so it is a good idea to fit 3"cranked front radius arms as when lifting buy 2"it all so makes the axel think it is lifted and puts front prop out of line puts you wheel alignment out

Cranked trailing arms reduce the at-rest stress on the chassis end trailing arm bushes. If you look at yours now, the bushes will be distorted when sitting level, so when the axle drops they'll distort even more. Cranked arms lessen or remove the distortion at rest so the bushes are free-er to distort when getting down travel.
Without the cranked arms the bushes will wear faster.

(about to send you a PM)

Thought I'd be cheeky and jump in...we have front and rear arms in stock at the moment as well as the bushes Mark is talking about (if you were looking at replacing, we have the full bush kit). I'd be happy to quote if you'd like pricing.
The front arms we have are terrafirma, the rear are britpart.


Sarah

it helps with the misalignment of the chassis bush.....plus the fact that the stock ones are made from bread sticks....

with only a 2 inch lift you should not need to worry about the front. Yes castor will be changed but the prop angle is correct as it is following the stock path.

As far as length change Ie with the lift the wheelbase gets shorter the more the lift...at 2 inches its bugger all, like maybe 5mm each for front and rear.

dont forget to do your brake lines,bumpstops and shock mounts to suit your lift

Serg

Thanks all, that was exactly what I wanted and needed to know ... is there any kind of basic formula, even without taking the limiting factor of the shocks into consideration, to calculate how much additional downward travel you'd get from cranked trailing arms alone?

LSD - Thanks for the offer of quotes mate, PM me if you like but I got a quote from somebody else and then checked for myself the U.K prices and I'd be cheaper to import them myself by about 1/3rd. I'd still be interested to hear your best price.

Simon.

at 2 inches of lift I doubt the arms will be your limiting factor. It will be your spring rate, length and whether you retain them or not....then you will need to find a shock to match the travel of that spring and mount it up so it doesnt top out during up travel before the axle hits the bump stop, infact the shock should have atleast 1 inch of up travel left when the axle touches the bumpstop as when you hit the bumpstop hard with a bit of speed the rubber will compress alot more than when just cycling the suspension

cheers,
Serg