16 captured repliesPartial discussion capture · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCH18" vs 20" rim size - Page 1 - Boxster/Cayman - PistonHeads UK
Leading reported evidence
Run on my cayman, 18s give a slightly better ride
Performed · outcome unconfirmed
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that performed work without a confirmed outcome
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Performed · outcome unconfirmed
Ran both on my Cayman, 18s give a slightly better ride but the 20s look so much better and I think they are slightly lighter.
18" vs 20" rim size - Page 1 - Boxster/Cayman - PistonHeads UK
Frequently discussed work
Run firmer damping, especially
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The thing with going with 18's over 20's is you can run firmer damping, especially on the rear, which will give you so much nicer, sharper steering feel and turn in.
18" vs 20" rim size - Page 1 - Boxster/Cayman - PistonHeads UK
Read full discussion summary
Leading evidence: 'Run on my cayman, 18s give a slightly better ride' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Run firmer damping, especially' (1 discussions). For that action, 0 discussions report a resolution and 0 report an unsuccessful attempt. No action has an explicit, attributable resolution report under the current rules. These are forum reports and suggestions, not a confirmed diagnosis.
Source reports, not a diagnosis or a success probability. Counts refer to discussions and can overlap.
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The thing with going with 18's over 20's is you can run firmer damping, especially on the rear, which will give you so much nicer, sharper steering feel and turn in.
18" vs 20" rim size - Page 1 - Boxster/Cayman - PistonHeads UK
Use car, rather than just keeping it in the garage
Suggestion or failed attempt
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Explicit resolution reports before identified causes, performed actions and suggestions. Within each level, matching component labels precede direct query mentions and inherited thread context; successful versus unsuccessful discussion counts, owner confirmations and independent discussion support determine order. This is not a probability of success.
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion · Original poster
(I mean if you actually use the car, rather than just keeping it in the garage and cleaning it...
18" vs 20" rim size - Page 1 - Boxster/Cayman - PistonHeads UK
Frequently discussed actions (3)
These are separate views of the same evidence. Frequency alone does not establish a fix, and these counts must not be added together.
Run firmer damping, especially
No successful repair reported for this finding.
0
Reported fixes
0
Unsuccessful attempts
1
Discussions
Read evidence and context
Discussions that contain suggestions
1
0 original-poster resolution reports. Counts can overlap; they are not unique people or a success rate.
0 discussions have direct query context; 0 report a fix in that context. Other evidence may inherit the discussion’s subject.
Suggestion
The thing with going with 18's over 20's is you can run firmer damping, especially on the rear, which will give you so much nicer, sharper steering feel and turn in.
18" vs 20" rim size - Page 1 - Boxster/Cayman - PistonHeads UK
Coverage and how to read this overview
Counts describe captured discussions, not unique people or a diagnosis. Author identities are not reliably stored. Exact duplicate evidence is counted once across matching discussions; one discussion counts at most once per action/state. Multiple repairs reported together remain a combination. Suggestions and failed attempts do not establish a fix. Matches cover whole discussions and can include related faults, model variants and incomplete threads.
16 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
PistonHeads: 1 discussions
0 evidence records excluded for query context · 0 excluded by outcome qualification · 0 adjusted by outcome qualification.
0 acknowledgements have no verified action link; they do not establish a repair result.
Generation: 20261027T011819Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Sure 20" rims look nice but are there any other advantages? Roads near me are full of potholes so I'd be a bit concerned of damaging them like the below:
Anyone gone 20" and regretted it? (I mean if you actually use the car, rather than just keeping it in the garage and cleaning it...
I saw in the Tesla forum (don't ask) the smaller wheel sizes seem to have quite a significant improvement in range, so I did wonder if 18"s had better economy.
Ran both on my Cayman, 18s give a slightly better ride but the 20s look so much better and I think they are slightly lighter.
I have switched back to the 20s recently and I am much more careful of holes and big ruts.
Probably going to be shifting the 18s on now as the car just doesn't look right with them.
TheOctaneAddict said:
the 20s look so much better and I think they are slightly lighter.
Given an identical wheel design in 18" & 20", the 18" will weigh less, because it is made with less metal.
Super Sonic said:
Given an identical wheel design in 18" & 20", the 18" will weigh less, because it is made with less metal.
I think you’ll find that might not be the case.
Often rolling radius is maintained between wheel sizes and tyres with a higher profile negate any weight saving from the smaller alloy.
That’s been my experience when I’ve weighed my Cayman summer wheels/winter wheels.
SkinnyPete said:
I think you’ll find that might not be the case.
Often rolling radius is maintained between wheel sizes and tyres with a higher profile negate any weight saving from the smaller alloy.
That’s been my experience when I’ve weighed my Cayman summer wheels/winter wheels.
I was comparing the weight of the wheels, not the wheels with tyres. Bigger wheels are heavier. A smaller wheel with more added weight may weigh the same as a bigger wheel with less added weight, it may even weigh more, but that's not what I said.
Super Sonic said:
SkinnyPete said:
I think you’ll find that might not be the case.
Often rolling radius is maintained between wheel sizes and tyres with a higher profile negate any weight saving from the smaller alloy.
That’s been my experience when I’ve weighed my Cayman summer wheels/winter wheels.
I was comparing the weight of the wheels, not the wheels with tyres. Bigger wheels are heavier. A smaller wheel with more added weight may weigh the same as a bigger wheel with less added weight, it may even weigh more, but that's not what I said.
What's the point in comparing wheels without tyres? You can't drive your car on wheels without tyres, so there's no reason to compare weights of wheels without tyres unless you're comparing how much metal you get for a particular price.
LunarOne said:
What's the point in comparing wheels without tyres? You can't drive your car on wheels without tyres, so there's no reason to compare weights of wheels without tyres unless you're comparing how much metal you get for a particular price.
Doesn't make me wrong though, does it?
Same wheels, same profile/ width tyres in two different sizes, the smaller one will be lighter.
You can fit 18's over the big brakes on the GTS 4.0 as I have 18s as my winter set.
Sadly I think it's just the poor condition of our roads that are to blame however there may be a compen case with your local council if they fail to maintain a road which then leads to damage of a vehicle.
LunarOne said:
What's the point in comparing wheels without tyres? You can't drive your car on wheels without tyres,
The chap I saw on Motorway Cops was giving it a good try.
The thing with going with 18's over 20's is you can run firmer damping, especially on the rear, which will give you so much nicer, sharper steering feel and turn in. It sharpens everything up and with the 18's means it is not shaking your teeth out.
I have both 18" and 20" wheels with summer tyres, given the state of our roads the 18" do a far better job overall IMO.
When I go abroad I put the 20" back on as they seem to have roads that are fit for purpose over there for some reason.
This is a source reference. Confirm exact model applicability in the original material.
