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Brake/rim Problems

GtrVspec
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GtrVspec Collaborator

GtrVspec

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Hey guys i have a slight dilemma with my brakes/rims. I have put on a set of alcons both front and back with 6 pot at the front and 4 back. Mechanic has now realised my 3 piece rims dont fit. Problem i have is that ive had 6 different tyre shops tell me different offsets i need. Along with one telling me it will fit and another supplier telling me none will fit. Has anyone had any of the same issues with alcon brake kits ? the car is a r33 gtr. i dont understand what the offsets are or how to work them out etcc ive had the mechanic fill in the sheets from Work Wheels and they're saying they wont fit yet the guy who sells them says they will. Can anyone shed any light at all ? The size of the rims i have are 18' atm with 275mm tyres. apprently stock RX8 wheels fit on as they mechanic had them on the car to move it around the shop. though i doubt theyre the same width rim and tyre.

Cheers.

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djr81 Grand Master

djr81

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Posted

It would help if you stated what the offset is.

There are two issues.

1. Getting enough room between the calliper & the spokes of the rim. This has nothing much to do with the offset.

2. Getting the offset right. From memory a number of about +12 is ok for a R33 gt-r (not sure) but you need also take into account rim width, tyre width, suspension camber.

Basically offset is all about how much of the cars track width the rim provides. A smaller number givers you a rim that sticks further out into guard which is a bit upside down but there it is.

FineLine Grand Master

FineLine

Posted
Posted
I would tell you the offset but i have no idea what it was previously. the rims on there previously where a set of blitz 3 piece im not sure what offset they are. apparently +12 isnt going to work either.

I.m running +12 volk gtc in 18 inch on the front of mine. The 6 pot alcons fit with room to spare.

Its not even about offset. Its about disc clearance. R type disc I think is what you need.

djr81 Grand Master

djr81

Posted
Posted (edited)
I would tell you the offset but i have no idea what it was previously. the rims on there previously where a set of blitz 3 piece im not sure what offset they are. apparently +12 isnt going to work either.

Most Blitz rims have the size, offset, manufacture date etc cast into them on the inside of the hub. Take the wheel off & have a look.

Are you happy with the size/offset of the rims you have? Remember the calliper clearance is not related to the offset.

I have a set of Blitz rims that only just clear the front callipers on my GT-R. The Volk CE28's I also have clear them by a good half an inch in all directions. The rims are the same size & the same offset ie 17*9 +22. So changing the offset is not the key to fixing the problem.

See this for sizing.

http://www.nismo.co.jp/en/products/competi...pdf/wheel02.pdf

Edited by djr81

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