High profile tyres, soft suspension

High profile tyres, soft suspension

Author
Discussion

projectgt

Original Poster:

318 posts

161 months

Monday 21st March 2011
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Anyone else gone from enjoying, stiffly sprung cars with little ground clearance and low profile tyres?

I have just restored a completely standard Renault 5 GT Turbo which has relatively soft suspension and high profile tyres compared to modern cars, I must say it does make traveling across our third world roads more manageable than in my modern everyday Audi. I am not old by any means but such is the deterioration of the roads everywhere (south bucks/berks) driving a modern performance car is just not enjoyable with these conditions...and don't start me on tax on fuel.

A friend today announced that he is to move to a far less sporty new car for this very reason.

I love the idea of an 997 GT3 RS on a track day but not on our roads.

kambites

67,654 posts

222 months

Monday 21st March 2011
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yes Modern car wheels/tyre and suspension setups are just stupid, especially in hot hatches and compact execs. People seem to have got it into their heads that sporty = hard riding, despite the fact that many of these cars are so stiff that it ruins the handling on most road surfaces.

EDLT

15,421 posts

207 months

Monday 21st March 2011
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I wonder if overly stiff suspension was chosen by the marketing department instead of the engineers. I can't believe that all of the German manufacturers, for example, would design a rock-solid suspension + giant wheel combo and forget that it ruins the ride when you are not chasing Nurburgring records.

MC Bodge

21,744 posts

176 months

Monday 21st March 2011
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People like to think that they're driving at somewhere like this:


When they are actually driving somewhere like this:

drivin_me_nuts

17,949 posts

212 months

Monday 21st March 2011
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kambites said:
yes Modern car wheels/tyre and suspension setups are just stupid, especially in hot hatches and compact execs. People seem to have got it into their heads that sporty = hard riding, despite the fact that many of these cars are so stiff that it ruins the handling on most road surfaces.
I wonder whether that's part of the whole 'driving experience' thing. You can't drive it like you stole it anymore... certainly not stuck in the daily grind... but the ride gives you the impression that you've just spent an afternoon on a special stage of a Nordic race. Perhaps cars with adaptive selectable suspension are a better alternative, though i'm not sure how viable that would be in smaller cars / mid execs.

Hereward

4,201 posts

231 months

Monday 21st March 2011
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My 4x4's combo of long-travel springs and high profile tyres make for a very relaxed cruise. I'm on 18-inch wheels and tyres with a 65% profile, it was even more waft-esque on the 17-inchers.

EDLT

15,421 posts

207 months

Monday 21st March 2011
quotequote all
MC Bodge said:
People like to think that they're driving at somewhere like this:
The wheels on that Lamborghini don't look like the normal 19-20" you can get on your repmobile. silly

rottie102

3,999 posts

185 months

Monday 21st March 2011
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MC Bodge said:
OT but what a sight in your rear view mirror when something like that is closing up on your 3 series... smile

rix

2,789 posts

191 months

Monday 21st March 2011
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currently wafting in a saab 9-5 with comfy springs and 15" wheels, yes its comfy but boy does it roll!

MC Bodge

21,744 posts

176 months

Monday 21st March 2011
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Personally, as someone who lives in Northern England, I'd rather have a car that is good on undulating, twisting hill roads (and better over potholes and speed humps as a side-effect) than something that would be more suited to a smoooooth race circuit. Tarmac rally style rather than DTM.

I often hear people telling others about the new car they're getting and saying something along the lines of,
"I'm paying a bit extra to get the 19s"

"Why are you doing that? It won't drive as well on most roads" I ask
"Yeah, but it looks better".

What is the end-point? Solid rubber strips on massive, heavy rims that flex in the absence of springs and dampers?

When I next get a fun car, I'll be tempted to fit smaller wheels.

Edited by MC Bodge on Monday 21st March 19:52

MC Bodge

21,744 posts

176 months

Monday 21st March 2011
quotequote all
rix said:
currently wafting in a saab 9-5 with comfy springs and 15" wheels, yes its comfy but boy does it roll!
It is a Saab 9-5 though, so we'll discard that comment wink

seismic22

644 posts

170 months

Monday 21st March 2011
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Just bought a boggo 1.8 mk1 foucs ghia, 89,000 mile old suspension and 185/65/14 tyres. Ringing its neck, it would wee all over tons of stuff on the bumpy roads i live on.

i stuck my mx5 on coilovers a while ago and it was ste, put it back on soggy old standard stuff and on REAL uk country roads its awesome again!

deveng

3,917 posts

181 months

Monday 21st March 2011
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All comes down to track width and CoG height, low wide cars can get away with soft suspension as body roll is lesser for and given cornering G.

To resist roll in a higher car you need stiff suspension and stiffer roll bars, which reduces traction, not to mention ride implications.

As for tyres, look at the elastic bands on a range rover 'sport' compared to a Le Mans car, and tell me low profile tyres are sporty.

kambites

67,654 posts

222 months

Monday 21st March 2011
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seismic22 said:
i stuck my mx5 on coilovers a while ago and it was ste, put it back on soggy old standard stuff and on REAL uk country roads its awesome again!
Aren't most "coilovers" (the original suspension is actually a coil-over setup) adjustable?

anonymous-user

55 months

Monday 21st March 2011
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I went from 235/45-17 to 195/65-15 in November and let me tell you, the elastic bands aren't going back on.

paulmeow

95 posts

166 months

Monday 21st March 2011
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im thinking of changing car due to the roads aswell

i drive an e46 saloon with 225/40 and 255/35. and its just such a chore weaving around every bump and pthole in the road. even drains but which have now sunk about an inch or 2 into the road.

when i get to work i drive a vauxhall combi van with 185/60s i believe, in comparison i would call the vauxhall the ultimate driving experience being that my back doesnt hurt in it.

LeoSayer

7,315 posts

245 months

Monday 21st March 2011
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kambites said:
yes Modern car wheels/tyre and suspension setups are just stupid, especially in hot hatches and compact execs. People seem to have got it into their heads that sporty = hard riding, despite the fact that many of these cars are so stiff that it ruins the handling on most road surfaces.
It's about looks and nothing else.

Sam_68

9,939 posts

246 months

Monday 21st March 2011
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Deja vu

Although oddly different in some respects...

deveng said:
To resist roll in a higher car you need stiff suspension and stiffer roll bars, which reduces traction, not to mention ride implications.
deveng previously said:
...As for not being able to drive as quick I drive much quicker ...in my heavily sprung Audi with rubber band tyres...
confused

... one thing that I don't think we discussed before was that stiffer suspension and tyres undoubtedly makes the car feel sharper and more responsive (because it transmits more of the instantaneousd changes in loads directly to the chassis), but that's a double-edged sword: apart from the degradation in grip on less-than-perfect surfaces, it means that you get less progression in the cars handling behaviour, making it less easy to exploit if you're not a driving God.

grumble

17 posts

161 months

Monday 21st March 2011
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i am just going through the same process on my st205, it has been lowered and got adjustable shocks which were set to their hardest,its so hard its just not enjoyable to drive and with the state of the roads i slow down for every bit of crap road there is , and theres plenty round here.
so i have found some standard springs and have adjusted the shocks to their softest, next is a set of 16in wheels and it should handle loads better.
as op said i reckon i will have better journey times and a lot more fun in the car than i have had up till now

Sam_68

9,939 posts

246 months

Monday 21st March 2011
quotequote all
LeoSayer said:
It's about looks and nothing else.
The sad thing is that even Caterham - who you would have thought would deliver what is necessary for the best driving experience and to hell with looks - readily admit that they fit wheels and tyres that are bigger than is optimum for their cars, simply because that's what their customers expect to see.