17 inch Cup II's
Drifting
Joined: Sep 2006
Posts: 3,379
Likes: 128
From: Stratford-upon-Avon
I think you’re fine if you order the wheels with the 993 part number ending 61M. They have the identical design and offsets but were intended for 968, and do not have any holes for RDK as per that list of wheel p/ns posted earlier.
You also posted link to the Porsche wheels and it was link to 968 wheels but with ET65 offset, part ending 61M and no holes.
So if you ordered wheels with p/n starting 965, just change to ones starting 993 and there’s no faff with holes.
You also posted link to the Porsche wheels and it was link to 968 wheels but with ET65 offset, part ending 61M and no holes.
So if you ordered wheels with p/n starting 965, just change to ones starting 993 and there’s no faff with holes.
Rennlist Member
Joined: May 2016
Posts: 443
Likes: 154
From: Ferndown, Dorset, England
I think you’re fine if you order the wheels with the 993 part number ending 61M. They have the identical design and offsets but were intended for 968, and do not have any holes for RDK as per that list of wheel p/ns posted earlier.
You also posted link to the Porsche wheels and it was link to 968 wheels but with ET65 offset, part ending 61M and no holes.
So if you ordered wheels with p/n starting 965, just change to ones starting 993 and there’s no faff with holes.
You also posted link to the Porsche wheels and it was link to 968 wheels but with ET65 offset, part ending 61M and no holes.
So if you ordered wheels with p/n starting 965, just change to ones starting 993 and there’s no faff with holes.
Will report back!
Rennlist Member
Joined: May 2016
Posts: 443
Likes: 154
From: Ferndown, Dorset, England
I think you’re fine if you order the wheels with the 993 part number ending 61M. They have the identical design and offsets but were intended for 968, and do not have any holes for RDK as per that list of wheel p/ns posted earlier.
You also posted link to the Porsche wheels and it was link to 968 wheels but with ET65 offset, part ending 61M and no holes.
So if you ordered wheels with p/n starting 965, just change to ones starting 993 and there’s no faff with holes.
You also posted link to the Porsche wheels and it was link to 968 wheels but with ET65 offset, part ending 61M and no holes.
So if you ordered wheels with p/n starting 965, just change to ones starting 993 and there’s no faff with holes.
Interestingly, I've now found a few sets for sale, that look like the part number has been changed on the wheel (there's only one character difference between the RDK and non-RDK equipped wheels).
My brain is about to explode with different issues, but I hope that helps someone!
I've also attached a Porsche Technical Bulletin, which may also help someone.
Rennlist Member
Joined: Jun 2005
Posts: 10,590
Likes: 1,032
From: Oman
John,
At least they are not selling wheels with holes in them!
The wheels you are looking at are what I refer to as Cup1 design. The later GTS's had the Cup 2 design- whether that is a factory term or a corruption I have no idea. As I understand Porsche dropped the RDK system for the later Cup2 wheels thus why they used a 993 part designation as there presumably was no need for a 928 specific designator. Interesting that the replacement part for Cup1 has no holes in them- maybe they are sending a retro message that the RDK system is "crap" after all!
At least they are not selling wheels with holes in them!
The wheels you are looking at are what I refer to as Cup1 design. The later GTS's had the Cup 2 design- whether that is a factory term or a corruption I have no idea. As I understand Porsche dropped the RDK system for the later Cup2 wheels thus why they used a 993 part designation as there presumably was no need for a 928 specific designator. Interesting that the replacement part for Cup1 has no holes in them- maybe they are sending a retro message that the RDK system is "crap" after all!
Rennlist Member
Joined: May 2016
Posts: 443
Likes: 154
From: Ferndown, Dorset, England
John,
At least they are not selling wheels with holes in them!
The wheels you are looking at are what I refer to as Cup1 design. The later GTS's had the Cup 2 design- whether that is a factory term or a corruption I have no idea. As I understand Porsche dropped the RDK system for the later Cup2 wheels thus why they used a 993 part designation as there presumably was no need for a 928 specific designator. Interesting that the replacement part for Cup1 has no holes in them- maybe they are sending a retro message that the RDK system is "crap" after all!
At least they are not selling wheels with holes in them!
The wheels you are looking at are what I refer to as Cup1 design. The later GTS's had the Cup 2 design- whether that is a factory term or a corruption I have no idea. As I understand Porsche dropped the RDK system for the later Cup2 wheels thus why they used a 993 part designation as there presumably was no need for a 928 specific designator. Interesting that the replacement part for Cup1 has no holes in them- maybe they are sending a retro message that the RDK system is "crap" after all!
17" Cup 1 vs Cup 2 - Rennlist - Porsche Discussion Forums
