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YOUR RESEARCH18 vs 19 wheels
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Replace effective spring rate at a minimum
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Change it and you've changed the effective spring rate at a minimum.
Leading evidence: 'Replace effective spring rate at a minimum' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Replace effective spring rate at a minimum' (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.
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Suggestion
They run regular 996's (not even GT3's) on race slicks in this series.
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Well, for what it's worth - Walther Rohl (sp?) - the Porsche Test driver, when talking about 18's or 19's on the latest model Porsches, said basically 19's may look cooler but he preferred 18's because they were more "sporting" and fun to drive.
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Suggestion
Well, for what it's worth - Walther Rohl (sp?) - the Porsche Test driver, when talking about 18's or 19's on the latest model Porsches, said basically 19's may look cooler but he preferred 18's because they were more "sporting" and fun to drive.
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Curious if 19" wheels on a 996's suspension is a problem. I've read some threads that the 996 suspension/frame can't handle the increase in wheel size,19. Anyone have info? Thanks. JW
Officially, Porsche will not certify 19" on a 996
Concerned it may lead to inner body damage?
They have no problems with the suspension taking 19" wheels.
I have 19" rims, and love them.
Firm ride, not harsh, handles well.
Suspect that Porsche are being their usual cautious selves to avoid claims.
Porsche began the 997 redesign by putting 19s on 996 suspensioned chassis'. In no time they discovered that they wouldn't hold up to the force potential of the 19 in rims and tires. They had to redesign all the suspension parts. (They wanted to share that between the 996 and 997 for cost containment purposes but were unable).
I'd call BS on that rumor. Look at the Grand Am Cup series. They run regular 996's (not even GT3's) on race slicks in this series. If the suspension can handle the loads generated in wheel to wheel racing on slicks I can't see how 19's would be a problem.
Additionally, the only additional "load" 19's would likely place on the suspension would be weight. A 19" tire will not provide any traction/adhesion advantage over a similarly sized 18" tire (although, like the 19" wheel, it will also weigh more than a simialr 18" tire).
Just a thought on tire weights vs. wheel weights.
If the diameter of two tires , one a 18" and one a 19", were the same (assuming identical width, say 285's), then the sidewall of the 19" tire would be shorter in order to accommodate the greater diameter of the 19" wheel. This would mean less rubber in the tire, and therefore less weight for the tire when compared to the 18" tire of identical outside diameter. So, unless something is escaping me here, the 19"
tire
will be lighter, which will ever so slightly offset the definitely heavier 19" wheel.
Well, for what it's worth - Walther Rohl (sp?) - the Porsche Test driver, when talking about 18's or 19's on the latest model Porsches, said basically 19's may look cooler but he preferred 18's because they were more "sporting" and fun to drive. 19's may or may not provide slightly better overall grip on a track, but in the real world- with imperfections in the roads, the 19's will jump and skip over bumps mid-turn whereas 18's will stay more planted. The only real benefit of 19's is that they look cool - and even then they can look sorta cheesy if you have small brake disks inside of the vast wheel with all sorts of empty space - some wheels show the disks more than others.
I could be wrong
, but I'm pretty sure the "load(s)" that were looked at in the suspension redesign of the 997 are peak impact loads which absolutely are worse on lower profile tires. The tire sidewall is part of the suspension system. Change it and you've changed the effective spring rate at a minimum.
Review El Torrente's post. It speaks directly to these changes.
Look at the size of the sidewalls on Formula 1 wheels.
Go with 19's....but here are the questions I would REALLY ask....what are you replacing? Go 19's if you replce them with similar weight or LIGHTER 19's....Yes there are lighter 19's than some stock 18's available....this will give you a performance advantage AND better look....For example I went from solid spoke 18" chrome twists...probably the heaviest wheel Porsche made.....to 19" Sport Designs...the probably the lightest 19 they make....I think its about a 5 pound per wheel savings....which makes the car more responsive. Now I can go lighter in an 18 if I want to, but I like th elook of 19's...18's just looked small with the body kit on it.
paid $1k (used) included install. that's why... The other car was a lease return and I happened to walk in the shop when the owner was returning the car and needed my stock suspensions.
also want to get the ugly MK 1 wing, I can get me one for $2,300 (new) including paint/wire harness for disabling wing light... and the wing is perfect workmanship (adjustable) but not those crappy ones you see once in a while.
but I will keep the original deck lid
