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Old 11th February 2019, 20:58   #1
patrolman pete
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Default Ride comfort from 18'' hairpins

After just enjoying a near 1000 mile trip around Scotland in my Connie auto one thing that spoils the driving experience is the ride on the 45 profile tyres on these hairpin wheels that the car came with when I bought her just over a year ago. I'm sure if I ran over a coin I could tell if it was heads or tails. Is this fairly normal for these wheels ? My tourer is fitted with 16'' unions and it soaks up the bumps with ease and gives a lovely ride unlike the Connie which crashes and bangs. Not wanting the faff of swapping my wheels from car to car to see if there is a difference, I was thinking about looking for a set of serpents which are 17'' and would like opinions of how these wheels perform as they look quite an attractive wheel.
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Old 11th February 2019, 21:13   #2
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lower profiles will always give a harder ride because the walls are much stiffer. A 60 profile for example will have a lot more "flex" in the side wall than a 45 profile and so give a more supple ride.

I'm not sure what profiles would be fitted to 17" wheels, I know 18" run with 45 profile on the ZT and I certainly found that the Mk1 ZT could rattle your fillings on rough roads.

Last edited by kelvo; 11th February 2019 at 21:16..
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Old 11th February 2019, 21:24   #3
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It’s probably common sense that the lower profile will give a harsher ride, but it’s not enough to compare one car to another, by tyre profile alone, unless both have same spring and damper set up.
Both my saloons, on 16” unions have front springs, by Suplex but of different model numbers.
The silver car has taller springs, and glides over certain road bumps that the gold car crashes into.🙄


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Old 11th February 2019, 22:38   #4
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Quote:
Originally Posted by kelvo View Post
lower profiles will always give a harder ride because the walls are much stiffer. A 60 profile for example will have a lot more "flex" in the side wall than a 45 profile and so give a more supple ride.

I'm not sure what profiles would be fitted to 17" wheels, I know 18" run with 45 profile on the ZT and I certainly found that the Mk1 ZT could rattle your fillings on rough roads.
Confirmed! Harsh isn't a strong enough word sometimes
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Old 11th February 2019, 23:44   #5
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[QUOTE=I was thinking about looking for a set of serpents which are 17'' and would like opinions of how these wheels perform as they look quite an attractive wheel.[/QUOTE]


Serpents run with 225/45r17 I have them on my conni, I wouldn't call the ride harsh at all, very good road holding and stability though.
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Old 11th February 2019, 23:48   #6
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Had hairpins on my ZT 160 when I bought it. Never thought they were substantial enough, had to replace two because they were no longer round!
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Old 11th February 2019, 23:49   #7
patrolman pete
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So it appears that the only good thing about the wheels is the looks as I've had plenty of compliments about them but I'm struggling to live with them. Surely someone has the 17'' serpents fitted and can advise on the ride to help me decide Oops ! Someone did whilst I was typing this out !��

Last edited by patrolman pete; 11th February 2019 at 23:52..
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Old 12th February 2019, 00:12   #8
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Hi Peter.
Another good wheel to look out for are the star spokes 215/50/17 you will get a nice ride from those as well.
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Old 12th February 2019, 05:56   #9
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I have 225/40/ZR18 on my hairpins and ZT suspension. No wonder I take my R45 to work. Once, a Renault came by my window, asked me what type of racing suspension I have as he said "your rear end of the car jumps with every single bump"

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Old 12th February 2019, 13:40   #10
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A reminder of the Handbook specs needed to ensure speedo conformity.

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