CTS V calipers installed and......

[rocket69GTP]

Rubbing my VMR's because they are a +50 offset. How big of a spacer would I need in order for these to clear, 3mm? How big can I go before I have to worry about having longer studs in the hubs?

[MIEngineer]

I've heard 5mm is the safest to run on stock studs but maybe someone here who actually has them can chime in.

[STL_G8GT]

When I was looking at doing the brembo's with stock 19" wheels, I looked into this. Most said 7-10mm spacer, to clear the brakes... and again most agreed that 5mm was the max "safe" spacer to apply. At 7 or 10 you would lose two to four threads, a big difference. I wasn't comfortable with spacers, and didn't want to change out studs... so I went the easy way and got the Camaro 20's. :) hope that helps...

[-Ray-]

When I was looking at doing the brembo's with stock 19" wheels, I looked into this. Most said 7-10mm spacer, to clear the brakes... and again most agreed that 5mm was the max "safe" spacer to apply. At 7 or 10 you would lose two to four threads, a big difference. I wasn't comfortable with spacers, and didn't want to change out studs... so I went the easy way and got the Camaro 20's. :) hope that helps...

Excellent advice.

[I12XLR8]

It has been shown that a 5mm spacer will allow the stock 18" rims to clear the Brembo's. I don't have the off-set numbers handy but hopefully the information helps. If your rim is similar you should be good.

See here (http://forum.grrrr8.net/showthread.php?t=27870&p=405617&viewfull=1#post405617).

[Todasi]

Rubbing my VMR's because they are a +50 offset. How big of a spacer would I need in order for these to clear, 3mm? How big can I go before I have to worry about having longer studs in the hubs?

Which VMR rims are they? Offset has little to do with if they will rub or not, the wheel spoke design and how it comes off the hub is more important. Since you have the brakes and the wheels, you need to determine how close they are and how much room you need. Safe = no rub, so, whatever it takes not to rub. Don't go more than 5mm, but that's my opinion. If they barely touch, use the smallest possible spacer.
Good luck and share what you learn.

[rocket69GTP]

http://forum.grrrr8.net/showthread.php?t=23244&page=2&highlight=VMR

I based everything after reading through this thread and SRG963 has the exact same setup as I do with the only exception being the front rims and I believe he runs the +45 8.5" (I have +50 9.5") wide rims and he has plenty of clearance where I do not. The only conclusion I could draw was the offset was affecting how much clearance I had for the calipers. I have 5mm spacers on the way and will finish the install hopefully tomorrow depending on what time they come in.

[MIEngineer]

Which VMR rims are they? Offset has little to do with if they will rub or not, the wheel spoke design and how it comes off the hub is more important. Since you have the brakes and the wheels, you need to determine how close they are and how much room you need. Safe = no rub, so, whatever it takes not to rub. Don't go more than 5mm, but that's my opinion. If they barely touch, use the smallest possible spacer.
Good luck and share what you learn.

That is not true. Offset has everything to do with clearance! Your distance between the back of the wheel face and the axial dimension on the caliper body is dependent on key wheel dimension - one or them being the wheel offset. Otherwise, we would not be having this discussion and changing offset would not allow calipers to clear the back of the wheel face.

[MIEngineer]

Several wheel companies sell the same rim with just different offsets but the actual spoke dimensions are not altered. Offset matters....

[-Ray-]

That is not true. Offset has everything to do with clearance! Your distance between the back of the wheel face and the axial dimension on the caliper body is dependent on key wheel dimension - one or them being the wheel offset. Otherwise, we would not be having this discussion and changing offset would not allow calipers to clear the back of the wheel face.

I'm sorry but I have to disagree. Wheel offset is only part of it. Since wheel offset refers to the center off the rim relative to the mounting face. Back spoke machining is critical to caliper interference.

[rocket69GTP]

I'm sorry but I have to disagree. Wheel offset is only part of it. Since wheel offset refers to the center off the rim relative to the mounting face. Back spoke machining is critical to caliper interference.

Not sure why the back spoke maching on a vmr v710 rim would differ from one offset to the next so for this application, I believe offset is the issue.

I got to thinking about this and I wonder if VMR manufactured thicker spokes since this is a 9.5" rim...

[rocket69GTP]

I did find out that the touch up paint for my wife's G37S is an EXACT match to the paint used on these calipers. Here is the info: Code K23, NNA Part No. 999PP-DSK23

[I12XLR8]

I did find out that the touch up paint for my wife's G37S is an EXACT match to the paint used on these calipers. Here is the info: Code K23, NNA Part No. 999PP-DSK23

Awesome! I've got a tiny chip on mine that I wanted to touch up but hadn't started to research colors yet...I love this forum!!!

[rocket69GTP]

Awesome! I've got a tiny chip on mine that I wanted to touch up but hadn't started to research colors yet...I love this forum!!!

Trust me when I say I got extremely lucky on this. :) Still wondering if these will work as I am trying it tomorrow. I read through and found out that the stockers need a 5mm spacer to work and they have a +48 offset so I am wondering if I need to stick longer studs on this or find someone with a pair of +45 VMR v710's to trade...

[I12XLR8]

You running the 18's? They only need a 5mm spacer and longer studs are not required. If you will be driving the car hard you might want to find hub centric spacers for extra support and longer studs wouldn't hurt. In my case the stock rims are used for my winter tires so a normal spacer and stock studs will work fine.

[MIEngineer]

I'm sorry but I have to disagree. Wheel offset is only part of it. Since wheel offset refers to the center off the rim relative to the mounting face. Back spoke machining is critical to caliper interference.

I won't disagree with you in the back space measurement. But my comment is in regards to what we are dealing with here - trying to gain caliper clearance on an already purchased wheel by adjusting the offset.

BS is an important measurement, and several wheel companies offer different BS for just that reason on the same wheel style, like Weld etc for the same vehicle.


I did find out that the touch up paint for my wife's G37S is an EXACT match to the paint used on these calipers. Here is the info: Code K23, NNA Part No. 999PP-DSK23

Make note:

Document ID# 1735189
2005 Cadillac CTS

Info - Brake Caliper and Line Touch-Up Paint
Availability and Code #05-05-23-011 - (Nov 28,2005)
Brake Caliper and Line Touch-Up Paint Availability and Code
2004-2006 Cadillac CTS-V
2006 Cadillac STS-V

Brake Component Finish Repair:

A painted, decorative silver finish is provided on the CTS and STS V-Series brake calipers. This finish
is also present on the visible section of the brake line and caliper bracket. Touch-Up paint is available
for minor repairs of chips and nicks on these components.

Important: Follow all instructions printed on the bottle to assure the best possible finish and durability.

Use Touch-Up Paint, GM P/N 12345005, available in 0.5 oz tubes. The color is Silver Met (WA 9021),
paint code 13U.

[rocket69GTP]

You running the 18's? They only need a 5mm spacer and longer studs are not required. If you will be driving the car hard you might want to find hub centric spacers for extra support and longer studs wouldn't hurt. In my case the stock rims are used for my winter tires so a normal spacer and stock studs will work fine.

Not running the 18's but was searching through the forum to find out what people had to do in order to run brembos under rims and the idea went out the window with the back spacing discussion. Will be trying this in a couple of hours and I will report back with results.

[rocket69GTP]

Spacers worked. Here are some pics.
http://i291.photobucket.com/albums/ll317/rocket69GTP/G8%20pics/photo-2-1.jpg
http://i291.photobucket.com/albums/ll317/rocket69GTP/G8%20pics/photo-2.jpg

[MIEngineer]

Nice wheels. Any full car shots?

[rocket69GTP]

It's dark out already so I will get some full side profile shots tomorrow. Here is what I have though.
http://i291.photobucket.com/albums/ll317/rocket69GTP/G8%20pics/photo-4.jpg
http://i291.photobucket.com/albums/ll317/rocket69GTP/G8%20pics/photo-5.jpg
http://i291.photobucket.com/albums/ll317/rocket69GTP/G8%20pics/photo-6.jpg
http://i291.photobucket.com/albums/ll317/rocket69GTP/G8%20pics/photo-8.jpg
http://i291.photobucket.com/albums/ll317/rocket69GTP/G8%20pics/photo-7.jpg

Absolutely love this car.

[I12XLR8]

It's dark out already so I will get some full side profile shots tomorrow. Here is what I have though.
http://i291.photobucket.com/albums/ll317/rocket69GTP/G8%20pics/photo-4.jpg
Absolutely love this car.

WOW! That is crazy tight Looks awesome though! ...and touch up those chips on the calipers! ;-P

[MIEngineer]

Looks good!

I posted the GM factory touch up paint p/n as well, should make touch up a breeze...

[I12XLR8]

I posted the GM factory touch up paint p/n as well, should make touch up a breeze...

I'll be picking mine up at the dealer when I do the Air Bag recall next week. Saved me a trip to the Nissan dealer!

[ULTRA Z]

I'm sorry but I have to disagree. Wheel offset is only part of it. Since wheel offset refers to the center off the rim relative to the mounting face. Back spoke machining is critical to caliper interference.

agreed i have seen the same diameter wheels with the same offset and one fit and the other not. Due to the spoke design