Ive heard this lots and had it lots when my S2 was on 17's, but never asked 'why it does it'? Why does bigger wheels make it do this?

 

its usually down to worn bushes and worn control arms and wheels blamed i belive

when my BMW was tramlining it was worn suspention rather than the wheels

 

imo bigger/wider wheels give more leverage against already tired bushes hence why tramlining is more noticable when you swap to bigger rims.

 

Also directional tyres, which I guess are the norm more on bigger wheels.

 

My front end bushes were all renewed and i rebuilt the hubs etc....

 

and the lower arms ??

steering rack ???

top mounts ???

tyres used ???

these ALL make a difference, but again just the larger size will affect the car anyway, fit

 

you need to make sure the centreline on the replacement rims are the same as your normal rims

and seeing as most are only skiiny rims that get replaced with wider ones this might explain the cause

that said, i noticed that when swapping over to 8" rims from 7.5" ones caused the steering to get noticably lghter

 

am going back about 8 years now but iirc they were some falken tyre of some sort!

 

Bit scary on a bike at 100+ on sunken tractor 'tramlines' I shat myself!

 

Had this with the T5, worn lower arm bushes and track rod ends. Alot better when replaced but still did a little bit...

 

Wide front wheels, suspension play, bad geometry

 

you forgot to add " old car "

 

mainly big wheels and tyres can cause this also

my car is all over the shop with the r888 in the damp never had an issue with the goodyear f1's

 

Inside lane on the approach to the m4 junction on the M25 - go there to experience tramlining...its great

 

Tramlining, as the name implies is a tendancy for the wheels of a car to follow the longitudinal ruts in the road as found in highly worn lanes or where heavy truck traffic is common, funnily just like a tram following its tracks. Its exacerbated by wider tyres as they hit more irregularities and varied offsets which affect suspension angles. Worn components only allow tramlining to be more pronounced rather than causing it. performance wheel angles such as camber and caster make it harder to manage once the car begins to follow the ruts.
Cheers,

Justin p

 

That must have come from Wik Wik Wikipedia

 

nope, nope, nope it didnt.

 

very good, your reply was the one that made most sense