10 captured repliesDiscussion pagination complete · Source accounts, not a confirmed diagnosis
THIS DISCUSSION / SOURCE-DERIVED OVERVIEW
Discussion summary
YOUR RESEARCHBumpsteer with GT3 Wheels
Leading reported evidence
Install pss9's those same rims wouldn't fit back up
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
However when I fitted the pss9's those same rims wouldn't fit back up!
Leading evidence: 'Install pss9's those same rims wouldn't fit back up' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Check since the shop was nice enough' (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 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
As I understand it lowered cars are prone to bumpsteer due to changes in the steering rack geometry/alignment (on old 911s you installed spacers under the steering rack to compensate).
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 · Original poster
Currently I am using 18" Carrera 5-spoke with offset of 50mm/65mm.
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
You might want to check since the shop was nice enough to give you a week to try out the rims...
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
Basically you encounter bumpsteer when you change the centerline of the tire, i.e.
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
As I understand it lowered cars are prone to bumpsteer due to changes in the steering rack geometry/alignment (on old 911s you installed spacers under the steering rack to compensate).
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 have my local shop installed the 04 GT3 Wheels yesterday and the shop agreed that I can test the wheels out for one week and if there is any problem, I can return the wheels.
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.
10 eligible posts · 0 unverified posts · 1 discussions match the subject in their title or opening post.
Rennlist: 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: 20261026T122219Z · outcome-qualification-6. Deterministic extraction; no AI model inference. How we use sources
Would fitting 04 'GT3 wheels with offset 40mm/63mm to 02 C2 Coupe lead to bumpsteer? Currently I am using 18" Carrera 5-spoke with offset of 50mm/65mm. I raises this issue with my local shop today and the mechanic says that there won't be any bumpsteer with the GT3 wheels. Is he right or is he just trying to sell me those wheels? Any comments is appreciated.
As I understand it lowered cars are prone to bumpsteer due to changes in the steering rack geometry/alignment (on old 911s you installed spacers under the steering rack to compensate). Even with a different offset from the wheels you have now I expect the GT3 wheels will maintain the centerline of the wheel in relation to the hub so that would be minimal change in suspension geometry there.
Seem to recall that the GT3 front wheels are outsized for the C2 wheel well....the C2's front cowling impeding the full range of steering
Wheel Enhancement (no association) should be able to give you a definitive answer.
I have/had a set of bbs re's and with their offset even at 56 v. 52 it gave the car noticable bumpsteer. However when I fitted the pss9's those same rims wouldn't fit back up! needless to say Tom from Lucent is letting me borrow his rims 52mm sport designs and BTW there is no bumpsteer with those fronts- FYI to make the bbs re's fit with my pss9's it required 15mm spacers which screwed up the offset even more.
Basically you encounter bumpsteer when you change the centerline of the tire, i.e. offset. it's really a shame because I do like the look of the re's but they just do not work for me period. I am also a very sensitive driver, and I would expect most people wouldn't notice the problem as marked as I would. I am hopefully going to work out a deal with Wheel enhancement where I bought the re's and have been waiting for a call back for a week now, to see what we can do about this issue.
btw front gt3 rims are 40mm offset with an 8.5 rim. BBS re's are 8.5 with a 56mm offset and stock rims are 8" with 52 mm offset, dunno what the 7.5's are for offset or what the 17's are -
I thought the Carrera 5 spoke has 50mm offset at the front. This was show in Carnewal's website. Would your 56mm offset make the wheel go deeper towards the wheel hub versus the 40mm GT3 wheel offset which pushes the wheel towards the outside?
Has anybody try fitting these GT3 wheels on the C2 Coupe?
deeper in. I guess the 5 spokes are 50 whereas the sport design/gt3mk1 wheels are 52. I have seen the rims on a few other cars but I haven't driven them but was told there was no bumpsteer. I find this hard to believe given my problems with spacers giving me basically 40mm give 1mm of offset with those bbs'ers
I have my local shop installed the 04 GT3 Wheels yesterday and the shop agreed that I can test the wheels out for one week and if there is any problem, I can return the wheels. Meantime, I still keep my Carerra 5-spoke. Since I do not want to spend any money on new tires (235/295) yet, I reuse the tires on the Carrera 5-spoke which is PZero Corsa 225/285. I went for a casual drive after the installation and at this stage, there seems to be no problem with the wheels: the tires are not touching the fenders from lock to lock. I will go for a hard drive this weekend to see whether there is any bumpsteer.
The shop does not have any access to a bumpsteer measuring device. What does a bumpsteer feel like?
Is there a chance that once you put on the 235/295 tires they might rub? You might want to check since the shop was nice enough to give you a week to try out the rims...
This is a source reference. Confirm exact model applicability in the original material.
