224 on non m.. tramlining?

S

stevespg

Member
I put some 224 rims and new ns2r tyres ( std non m size tyres). Picked up a degree of tramlining which was absent before.

Pressure was 33/35 but tried 36/37, which seems to make it a little better but still feels more nervous than on the old rims/ tyres

i can't determine if it's the wider rims stance due to different offsets or the new tyres that is causing this.. anyone just swapped the rims but not tyres, and able to comment? Given that so many space rims wider, does that have a negative effect on tramlining?

I can go tyreswapping , but thought it makes sense to ask first



Thanks
 
I spoke with a few guys that had the issue as my z4 with CSL reps is tramlining all over the place! Many have fixed it with different tyres. I've yet to get rid of mine with falken fk453...
 
My 108's on falkens were as twitchy as hell. Tried diff pressures but same result everytime.
When i swapped on to my tiny winter tyres 225x50x16 all round, the tramlining and twitchyness totally disappeared. Can drive along with one finger on the wheel all day. Steering wheel is rock solid and stable. No vibration whatsoever and the ride quality is also transformed by the high profile tyres. Now supersoft.
Will almost be a shame to put the summer tyres back on come spring but might swap on some new vreds to see if that helps....
 
My car came on original 17's and runflats which were a tramlining nighmare! On forum advice I switched to Falken's on the 17's which were perfect and cured the issue. A few years later I swapped to 18" staggered 108's on Eagle F1a2's and experienced straight line 'wander' rather than tramlining, months of tinkering with pressures, two 4-wheel alignments, front suspension re-build and rear springs finally cured it!

This article on tramlining is in my opinion spot on and explains why softer, less grippy tyres tramline less and the crucial line for me is
quote: "a higher performance tire will also uncover any previously unnoticed looseness in the rest of the suspension". And I think that's the most common cause when we upgrade our wheels and tyres. Time to check your bushes :thumbsup:

tramlining article http://www.tirerack.com/tires/tiretech/techpage.jsp?techid=47
 
Thanks for the comments , all appreciated and I'll read the link with a beer tonight.

I swapped my stock fronts back in, (left the rear 224 in as I wondered if it was the wider rear track causing the issue vs the fronts) ....Mv2 I think the stock ones are called.... with Newish vrdestein.....

tram lining totally gone! I don't know the offset differences between the 224 and stock mv2 at the front, but it doesn't look much different

If anyone knows the offset difference that would be great, but it would seem Zed just don't like the new tyres.....vredesteins it is then...
 
stevespg said:
Thanks for the comments , all appreciated and I'll read the link with a beer tonight.

I swapped my stock fronts back in, (left the rear 224 in as I wondered if it was the wider rear track causing the issue vs the fronts) ....Mv2 I think the stock ones are called.... with Newish vrdestein.....

tram lining totally gone! I don't know the offset differences between the 224 and stock mv2 at the front, but it doesn't look much different

If anyone knows the offset difference that would be great, but it would seem Zed just don't like the new tyres.....vredesteins it is then...
Click to expand...

Glad you made some headway Steve , apologies for going off contact yesterday PM , i was at a 50th wedding bash that turned out better than expected & didn't leave until 1am :oops: :cry: :)
 
Get it aligned buddy and change your geo settings as run a little more front camber and a bit less rear and that will help a alot.

Also check your front lollipops and rear trailing arm bushes these won't help things when worn, the grippy tyres aren't helping but the things mentioned will help it alot.

Let us know how you get on.
 
hopz121 said:
change your geo settings as run a little more front camber and a bit less rear
Click to expand...

Interesting, I've read this advice to ease tramlining on several forums recently, apparently the Z4 has unusual stock settings compared to other BMW models, even those that share components :thumbsup:
 
Ewazix said:
hopz121 said:
change your geo settings as run a little more front camber and a bit less rear
Click to expand...

Interesting, I've read this advice to ease tramlining on several forums recently, apparently the Z4 has unusual stock settings compared to other BMW models, even those that share components :thumbsup:
Click to expand...

They are a lot different, I couldn't get on with standard Z4 settings after a few sessions on a hunter machine and finding a good alignment guy it transformed the car and it drove how I expected. They advise far to much rear camber in standard form IMO.
 
so how much is "a bit" ....


anyone have any geo settings that have worked well? I'll look at this longer term, but i do have a set of new front wishbones drop links and lollipops to fit at some point so it'll be after those are fitted.

at the moment, I just swapped the old tyres and rims back on, so all is ok, but I will fit the vredesteins to the 224 rms and use those as they're freshly refurbished.
 
hopz121 said:
Ewazix said:
hopz121 said:
change your geo settings as run a little more front camber and a bit less rear
Click to expand...

Interesting, I've read this advice to ease tramlining on several forums recently, apparently the Z4 has unusual stock settings compared to other BMW models, even those that share components :thumbsup:
Click to expand...

They are a lot different, I couldn't get on with standard Z4 settings after a few sessions on a hunter machine and finding a good alignment guy it transformed the car and it drove how I expected. They advise far to much rear camber in standard form IMO.
Click to expand...

do you by any chance have the numbers for the alignment? any shop should be able to replicate it but not without details.
 
I don't mate no,

The paperwork went with my old z4 I think it was something between Z4M/ CSL settings from memory which I tweaked slightly.

I may have put it on a thread many years ago but I cant remember which I am afraid.

I ended up using Lee at FCM in Bristol and he really knows his stuff, highly recommended.

I will only take the M3 to him or Hounslow tyres now had too many rubbish garages try alignment and mess it up!
 
Since working out what to do to sort my tramlining I've done a lot of reading on alignment and what I hadn't realised is that every change in suspension height, wheel size or spacer use requires different alignment settings, and it's also down to use - track work will require very different settings to those recommended for an average commuting road user.

There is some really good stuff on the Alpina forum (apparently the alpina uses 19's with non-RFT's, lower springs but standard SE alignment geo settings rather than those from M'sport as you might expect so is a mix. Reason? trial and error tuning gave the ride handling compromise that felt right, no computer modelling, no hard-and-fast rules, in fact it seems that is the industry norm. So sticking with stock settings really is a matter of taste within limits.
 
stevespg said:
Thanks for the comments , all appreciated and I'll read the link with a beer tonight.

I swapped my stock fronts back in, (left the rear 224 in as I wondered if it was the wider rear track causing the issue vs the fronts) ....Mv2 I think the stock ones are called.... with Newish vrdestein.....

tram lining totally gone! I don't know the offset differences between the 224 and stock mv2 at the front, but it doesn't look much different

If anyone knows the offset difference that would be great, but it would seem Zed just don't like the new tyres.....vredesteins it is then...
Click to expand...
Offsets for 107/108/MV2 styles F 8.0 x 18 ET47; R 8.5 x 18 ET50 / offsets for ///M 224 style F 8.0 x 18 ET40; R 9.0 x 18 ET30
 
You must log in or register to reply here.
Back
Top Bottom