Whilst chopping off yet more of my rear bump stops i noticed that both my rear tyres are wearing on the iner edges. Is this normal or can anything be adjusted on the rear? Sent from my SM-G960F using Tapatalk
There is a procedure using the four bolts that hold the rear hub carrier to the suspension spring plate, that can reduce the camber on a lowered bus. If you look at tyre wear vs inflation pictures, you will find that the closest match to that wear pattern on the edges is under inflation. So another part-solution is to increase the pressure. ONLY IF THE LOAD RATING ALLOWS. For instance, my 92XL rated tyres allow up to 50 PSI, so I increased the rear pressure to 45 psi. Dont know if it works, as the tyres are still fairly new.
65psi they are 185 R14 C They do bulge a bit I have them at 40 psi at the mo. Sent from my SM-G960F using Tapatalk
Correct size and the pressure is thereabouts . As Mike rightly says there are 4 bolts holding on the rear hub assembly which are adjustable on the plate , i`ve never altered mine but i suppose the option is there if you feel the need to play with the rear geometry ..
As Mike says, the four bolts. Looking at the plate and rear carrier... Max -ve camber (which you're wanting to get away from) is when the angle is ^ Min -ve camber (the best you can do) is when the angle is v. If the carrier is unsupported as you tighten those bolts the result is max -ve camber. Bad. To set to minimum, loosen the 4 x 22mm spanner bolts, delicately jack under the shock end of the carrier (probably easier to judge without shock fitted) until the free rotational play between the springplate and the carrier is taken up, then tighten the bolts.
If you lower 'em, you have to do your best with the camber because even the best is out of spec. Doing the opposite is asking for tyre wear.
Well for now I've taken the easy route Upped the psi to 45 See how that gets on. If not then ill av a go at the four bolts. Cheers all. Sent from my SM-G960F using Tapatalk
Hi Sorry to interfere with this post but it's sort of similar. I have 195 65 R15 95T tyres on the back. Tyre says max pressure 50 psi (3.4 Bar) is this the correct pressure - thick skinned so I don't mind if this is embarrassingly stupid question. Thanks for the help and comments...
Basically correct pressure stock height is about 40 psi, 42 for heavy load . Increasing it by 10% to 45 psi still leaves room for error with 50 psi rated tyres. Scariest I have seen was a 4 tonne boat on a 2 wheel trailer with 4 inches ground clearance, tyres at max 120psi pressure and bulging. Made it to Scotland from the south coast though..
On my long trip around Wales recently my 185x14 were awful at 30F/40R. Bus was all over the place. Not enough load rating. Pumped them up to 40F/50R and it handles a lot better but every time I screech around an island I'm waiting for a tyre to pop. Need to get better tyres soon.
I had the opposite! Garage fitted new tyres and the bus was bouncing all over the place. When I git home, I checked the pressures and they were all at 40. Dropped the fronts back to 30 and normal service was resumed.
I temporarily fitted some 82 rated tyres to the lowered front of my early, it was like having blamange tyres and felt like they'd peel off the rims round long corners.
I would have thought the 4 bolts holding the hub carrier to the spring plate were for adjusting the Toe in/out. I did my beetle this way after changing a rear arm. Used the basic tracking gauges from work but fitted to the rear wheels.
Both. It's in your Bentley or Haynes. You're effectively twisting the diagonal arm one way or the other, the hub is at 45 degs on the end. There isn't much adjustment but from max to min is noticeable. Ideally, lowerers would move the diagonal arm brackets higher up on the torsion beam which would take the twist out of the spring plates and correct the camber. I drew it up on CAD years ago IIRC it's appoximately an inch but I never had the guts to try it.
