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2006 Cadillac CTS, Light Tarnished Silver Outside, Gray with Black Inside
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Discussion Starter #1 (Edited by Moderator)
So, I know I have JL9 brakes, I’m replacing the full brake system either way this goes, ( JL9 or JE5 ), including hub assemblies and brake hoses, figured I have time, might as well do it all, my work office is closed til the first of the year ! So, I’d love to upgrade the entire system to JE5 brakes, just concerned about the fittment ?

And I see what the different sizes are and such, 11.9 vs 12. 7 front, and 11.7 vs 12.5 rear . It looks like a lot of room to do it, but could be very dicey and so unsure ? But, so many variables are concerning, would it clear the inside rim / wheel weights, will it make it too close to and the rub on the suspension, will it need realigned to make the tires and rims fit with the new brake system, would I then need to go to 17X8, or 18X8 wheels and then tires to fit the those rims / wheels, or are the 17X7.5‘s 225/50R17’s ok for the JE5’s ? Or just stick with the JL9 brakes ?

I want to be sure, and check, and double check, before I order either brake set up ! Thanks in advance for any and all help ! It will be, and would be very great full and,
so much appreciated ! Thanks again !

Later, peace out, HOSE !
 

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'05 CTS-V
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8,299 Posts
Can’t catch a brake, need them yesterday ( full front... - So others can see where this discussion began.

Based on what Argent already told you in that thread, and based on the pictures you posted that show you have massive amounts of clearance between the calipers and your current wheels, I don't see any reason to think the JE5 brakes won't fit with your wheels.
 

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2006 Cadillac CTS, Light Tarnished Silver Outside, Gray with Black Inside
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Discussion Starter #3 (Edited by Moderator)
AAIIIC, yeah it was sort of bitter sweet when Argent posted that it should work, and was so very excited, and then the, they are narrower, part has been stuck in my head ! And agreed so much room, but how deceiving it may be, and then as all I listed above, I start thinking about how it could all go awry and sideways ! Also thanks for taking the time to look at it, checking it out, and responding as well, appreciate the input !

I figured, if I started a new discussion but differently, cause first I was trying to figure my brakes out, now I’m on to the wheels, and was hoping someone who has had experience at this, tried it, and or done this, win, lose, or draw ?

I’m hoping this is the last car I ever have or need, unless I hit it big out at the Hollywood casino, horse track, & sports book, then I can buy a second newer Cadillac ? Ha !

But, I just try and do what’s best for the car, no matter, mechanical, fluids, or cleaning, I love this car, It is art and speed, so, nothing but the best for it ! Thanks for the post,
Later, peace out, HOSE !
 

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2006 Cadillac CTS, Light Tarnished Silver Outside, Gray with Black Inside
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18 Posts
Discussion Starter #4
So, I may have broke my wife‘s crafting ruler, but I think I have the room for the JE5’s, as Argent, AAIIIC belived and said I should be able to do, so thank you to them for the get up for me to go measure ! Ha ! Now I’m no mathematics major, but do I know
odds and fractions, but it looks good !

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Fronts, above with wheel space at caliper to wheel, about 2mm, wheel space at rotor to wheel, about 4mm, wheel space .
 

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2006 Cadillac CTS, Light Tarnished Silver Outside, Gray with Black Inside
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Discussion Starter #5
And now the rears with pretty
much the same spacing’s

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2006 Cadillac CTS, Light Tarnished Silver Outside, Gray with Black Inside
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Discussion Starter #6
Thanks again to AAIIIC, and Argent !
Will still take any input from you guys and any one else ! Thanks to all on the site ! Later, peace out, HOSE !
 

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2006 Cadillac CTS, Light Tarnished Silver Outside, Gray with Black Inside
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Discussion Starter #7
And for your help, I’ll brighten you day with these beautiful shots in the back yard on the river over looking the Susquehanna river, and the Rockville bridge, longest stone arch bridge in the world, enjoy !

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2007 CTS
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226 Posts
You might want to check the rotor diameter also, my set up came with the larger ones,almost 12" dia. It is listed as Sport Suspension whenever I order parts.
 

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'05 CTS-V
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So, I may have broke my wife‘s crafting ruler, but I think I have the room for the JE5’s, as Argent, AAIIIC belived and said I should be able to do, so thank you to them for the get up for me to go measure ! Ha ! Now I’m no mathematics major, but do I know
odds and fractions, but it looks good !

Fronts, above with wheel space at caliper to wheel, about 2mm, wheel space at rotor to wheel, about 4mm, wheel space .
Those aren't millimeters, those are centimeters. And since the new rotors are about 20mm larger in diameter, you've got plenty of room for the JE5 rotors.

And now the rears with pretty much the same spacing’s
Which makes sense, as the front and rear rotors are nearly the same size (303 vs 298mm).


You might want to check the rotor diameter also, my set up came with the larger ones,almost 12" dia. It is listed as Sport Suspension whenever I order parts.
The smaller brakes are almost 12"; the larger ones are closer to 13". 12.72" front and 12.56" rear with the JE5 brakes, compared to 11.93"/11.73" with the JL9 setup.
 

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2007 6 speed manual tarnished platinum
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377 Posts
100% yes will work, I've done it, same wheels. Was at the pick n pull and found a true sport model pulled them all and the grille and the nivomat rear shocks. I already had a shock tower brace so left it. Had the rotors turned and akebono pads. I don't get on here much anymore or I would have chimed in sooner. An easy way to tell what you have without measuring is the front jl9 caliper doesn't have a square opening on top the je5 has one. Anyone need some low mileage jl9 EBC rotors? Lol I already had a sport model grille but didn't want to see it crushed if anyone is interested, it's a gray blue color.
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2007 CTS
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Now, check out the Ghettano Air Box Mod in the stickys up top, then get some V sway bars, you won't regret it.
 
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