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[feeutfo]

2woody we have discounted all of those.

certainly the tyre compound and tread pattern will have an effect.

Discounted those, if the implication is that grippier tyres tramline more? sc3mo have way more grip have a bigger size in 18' are wider in 245 and lower in 40mm profile. these do not tramline(although they have other shortcomings)

 Falken 912 are narrower in 235mm, higher in 45 profile, and are 17". they have way less grip than Sc3 Mo.
YET....its the smaller tyre with less grip that tramlines more.

in order to deflect to absorb the camber, the tyre would really need to be quite soft with a tread pattern able to move around a lot. Pattern a might not be as good as pattern b. then again pattern a when old might be better than pattern b.

Again the problem there for me is, the comparison between sc3 Audi and sc3 Mo (merc) as they both have the EXACT same tread pattern. Compound could well be different though. But the grip level and wear rate seems the same Afaict.

I'm sorry, but all of this comes as no answer for someone with a tramlining car.

While these are all in the tram lining book of legends, and I accept fully they all increase the likely hood of directional stability issues. I have trouble accepting any of them as the one and only cause, or even collectively, given my experiences.

Construction. Perhaps?


Oh another theory on the sc3 Mo/sc3 Ao1 comparison to discuss perhaps. Thinking along the lines of euro style wheels and tyre fitments. Sorry, bare with me.

 Take an 8j rim, fit a 235 tyres(ao1). 8j is an inch wider, or at least wider than the oe 17" oe omega wheel. This would give a sidewall shape in profile pointing away from the hub centre.
          +
         Hub
      Centre


\___tread____/

But a wider 245 on the same rim would give more vertical side walls perhaps

           +
         Hub
       Centre


|____Tread_____|

In this case I wonder if the top diag would tram line more...?

[05omegav6]

The top pic would suggest that the tyre will be able to roll over the shoulders, whereas the 245 should be better supported, especially if the tyres are XL

[feeutfo]

The top pic would suggest that the tyre will be able to roll over the shoulders, whereas the 245 should be better supported, especially if the tyres are XL

I agree I think.


And XL are alleged to tram line more too. Or at least its mentioned on the wheels in motion web site as such. Yet Entwood has 97load with XL . Iirc...?
They go straight.

(I'm praying SMD's issues are pressure related. Please god.)

[feeutfo]

A would like to add. I have no experience of euro style handling. And that we are only talking 10mm difference across the width. 5mm each side. Although, isn't there a ratio of width and height or sumat?

[2woody]

there are recommended rim widths for every tyre. I've no experience outside those.

I also shouldn't comment on "euro" style tyre fitting just at the moment

[feeutfo]

there are recommended rim widths for every tyre. I've no experience outside those.

I also shouldn't comment on "euro" style tyre fitting just at the moment

Whyzatden?

[pauls]

I run 235 45 17  on elite wheels. tyres on the front are 97w xl. these have been on for about 1k miles so far with no tramlining

[feeutfo]

I run 235 45 17  on elite wheels. tyres on the front are 97w xl. these have been on for about 1k miles so far with no tramlining

What make? Model?

[pauls]

Budget westlake sv308

[feeutfo]

Budget westlake sv308

Sorry, west what? ok ok ignore me.

Hang on I'll start another thread.

[pauls]

Budget westlake sv308

Sorry, west what?

Thats what i thought. But they where round and black so i thought that will do.
 If you want to try them let me know and i will pop over so you can test them on known roads to you

[feeutfo]

Budget westlake sv308

Sorry, west what?

Thats what i thought. But they where round and black so i thought that will do.
 If you want to try them let me know and i will pop over so you can test them on known roads to you

Your more than welcome.

I'd be very interested.

[doz]

I fear I may just about to upset the handling on my Mig. Once I'm up to it I've got a set 18" rims with 225's for the front and 245's for the rear.