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YOUR RESEARCHNeed a quick answer please - 03' C4S - Twist Wheels: Hollow or Solid Spokes?
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Use tt hollows and they are lighter
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I also bought a set of used TT hollows and they are lighter.
Need a quick answer please - 03' C4S - Twist Wheels: Hollow or Solid Spokes?
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Leading evidence: 'Use tt hollows and they are lighter' (no explicit attributable resolution; this is a reported action or suggestion). Across 1 matching discussions, The most frequently discussed action is 'Use hollow' (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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Need a quick answer please - 03' C4S - Twist Wheels: Hollow or Solid Spokes?
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There are two ways I'm aware of... Hollow spokes have a lip (indentation) on the backside of the spoke. You can feel this by reaching around a spoke. They also have metal valve stems, as opposed to rubber.
Actually the hollows feel smooth and rounded around the back of the spokes while the solids have 2 ridges or grooves behind the spokes...I know it sounds like it should be the other way around, but it isn't. And the valve stems on hollows are metal with a visible nut at the base of them. If you have a C4S, it did not come from the factory with hollows.
I have the hollow wheels on a narrow body 996.
part#s are
993.362.136.00, 8x18, 52mm offset, tire size 225/40 ZR 18;
rears are part no. 993.362.140.01, 10x18, 65mm offset, tire size 285/30 ZR 18.
they are VERY light... lighter than my stock 17s, which are now for the winter tires.
I have both. The stock C4S wheels are solid, then I bought a set of "new" hollows off a 2003 turbo on eBay.
Hollows are definitely lighter and fetch a higher price either new or used. To be honest, though, I think the lighter weight is all about bragging rights more than anything else. I've tracked the car with both, and I can't tell the difference. They look the same since I have the full metal valve caps on the solids, and they feel the same on the track.
Those are 993 wheels, NOT 996.
I see where the miscommunication came from. Those are the 996 narrowbody hollow spokes, equal to the 993 turbo hollow spokes. But, they are NOT the 996 turbo hollow spokes.
Here are the part numbers for the 996 turbo hollow spokes:
Front: 996.362.136.04
Rear: 996.362.142.11
They are also of different dimensions. The front 996 turbo is 8x18 with a 50 mm offset, while the 993 turbo/996 narrowbody is 8x18 with a 52 mm offset . Small difference, really, but the rear difference is more substantial. The rear 996 turbo is 11X18 with a 45 mm offset, while the 993 turbo is 10x18 with a 65mm offset. I'm quoting your numbers for the latter, as I only know the 996 turbo numbers.
Those are also the exact dimensions for the 996 C4S solids. AW 21 has the C4S, and the easiest swap would be to get the exact same wheels but hollow spokes from a 996 turbo, not the 993 turbo. Those are what I have, and I just swap street tires/wheels on the solids with track tires/wheels on the hollows whenever the need arises.
This is a source reference. Confirm exact model applicability in the original material.
