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      03-16-2015, 09:08 PM   #1
dojk
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2010/11 Z4 35is front rotors. Direct fit to 135i?

Hi,

I am in the market to replace my front rotors and pads on my 2008 135.

Pads wise i think i will be going for StopTech Street Performance.

Rotors originally were looking at the BMW Performance slotted & dimpled rotors, but recently was made aware that lighter Z4 35is ones could be mounted directly.

I would like to verify is this is correct.

Thank you in advance.
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      03-19-2015, 07:57 PM   #2
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They call for different part numbers. They might fit, but get the right part. You won't notice a difference in weight.
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      03-19-2015, 08:12 PM   #3
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Quote:
Originally Posted by dojk View Post
recently was made aware
By who (or is that whom?)?

Any chance you could buy them and return them if they're uninstalled? Maybe then you could check first hand if there's a size or weight difference?

Keeping in mind that you should be willing to pay shipping both directions and possibly a restocking fee as well, no sense putting a company out their time and inventory without some kind of reimbursement.

Or - maybe a dealership would let you have a look?

You'd need to be sure of everything - not just hole pattern but offset, diameters plural, etc.
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      03-19-2015, 08:42 PM   #4
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2008 BMW 128i  [10.00]
135i rotor is 338mmx26
z4 rotors from 2010 + can only fit 335i front calipers. 345mmx28
OR with a special part number the 330i front caliper. 330mmx26
OR with Dieselboost caliper carier from Tronik/dronik/ russian dude you can fit CSL m3 rotor 345mmx28

The only alternative to OEM rotor may be able to fit is the 235i/F30 335i base rotor - non Perf brake version 340mmx30 it may be too thick.
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"The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is
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      03-19-2015, 08:43 PM   #5
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2013 128i  [9.58]
Quote:
Originally Posted by dojk View Post
Hi,

I am in the market to replace my front rotors and pads on my 2008 135.

Pads wise i think i will be going for StopTech Street Performance.

Rotors originally were looking at the BMW Performance slotted & dimpled rotors, but recently was made aware that lighter Z4 35is ones could be mounted directly.

I would like to verify is this is correct.

Thank you in advance.
Z4 35is rotors are not lighter than 135i rotors. The construction is the same, steel rotors riveted to aluminum hats, but the the 335i rotors are larger in diameter and thicker than those of the 135i and of an unknown (to me) difference in offset.
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      03-19-2015, 08:44 PM   #6
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2013 128i  [9.58]
Quote:
Originally Posted by andrey_gta View Post
135i rotor is 338mmx26
z4 rotors from 2010 + can only fit 335i front calipers. 345mmx28
OR with a special part number the 330i front caliper. 330mmx26

The only alternative to OEM rotor may be able to fit is the 235i/F30 335i base rotor - non Perf brake version 340mmx30 it may be too thick.
348mm x 30mm

330mm x 24mm
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      03-19-2015, 08:46 PM   #7
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2008 BMW 128i  [10.00]
Quote:
Originally Posted by Suprgnat View Post
Z4 35is rotors are not lighter than 135i rotors. The construction is the same, steel rotors riveted to aluminum hats, but the the 335i rotors are larger in diameter and thicker than those of the 135i and of an unknown (to me) difference in offset.
No offset difference as far as I know...
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128i Sport 6MT converted to Euro 130i spec, 3.73 diff, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE
In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff


"The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is
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      03-20-2015, 08:26 AM   #8
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2008 BMW 128i  [10.00]
Just occurred to me, if 335i/z4 disk rotor has same offset as 135i
the 135i caliper needs a custom bracket and it will be able to use it...
the samething RacingBrake did
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128i Sport 6MT converted to Euro 130i spec, 3.73 diff, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE
In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff


"The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is
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      03-20-2015, 08:38 AM   #9
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2013 128i  [9.58]
Quote:
Originally Posted by andrey_gta View Post
Just occurred to me, if 335i/z4 disk rotor has same offset as 135i
the 135i caliper needs a custom bracket and it will be able to use it...
the samething RacingBrake did
Don't forget the extra 4mm of thickness of the 335i/Z4 35is rotor.
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      03-20-2015, 09:07 AM   #10
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2008 BMW 128i  [10.00]
Quote:
Originally Posted by Suprgnat View Post
Don't forget the extra 4mm of thickness of the 335i/Z4 35is rotor.
The thickness should be fine, because Tronik/Dieselboost makes the caliper work on a 28mm thick disk.

but you may be correct that the thinness may require the custom braket to be centered in a new way for 28mm vs 26mm.

...
I will check later reardign offset, but in a simple & dangerous scenario someone may simply mill a spacer for the current OEM bracket mounting points to caliper, to make 135i caliper work with 335i rotor. Then use longer Bolts to mount caliper to bracket + spacer, sourced from a different thread - Focusedintentons user and his replacement bolt for caliper mounting could tell you where to find them.
Obviously the safer option is a new custom mill bracket...

anyway thanks Suprgnat for correcting some dimention errors. I guess you are looking for a brake update like the 335i calipers
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128i Sport 6MT converted to Euro 130i spec, 3.73 diff, tuned by evolve ~220 whp 207 wtq(ft-lb) SAE
In-progress: //M front arm, M3 rack, e36M lip Wishlist: Coils, n55 mnts, headers, LSD, e60 finn diff


"The 1-series is the last car that BMW engineered before the Germans, as a car-making culture, fell out of love with driving." - R&T 2013 135is

Last edited by andrey_gta; 03-20-2015 at 09:13 AM..
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      03-20-2015, 09:28 AM   #11
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2013 128i  [9.58]
Quote:
Originally Posted by andrey_gta View Post
I guess you are looking for a brake update like the 335i calipers
I already have the 335i calipers/Z4 35si rotors ready to install. Unfortunately they don't fit in my Style 207M wheels even with my 12mm spacers. The calipers contact the barrels where the barrels taper down to meet the spokes. I currently have them up for sale, but I'm going to try test fitting them this weekend with a rear 7.5 inch wheel and see if that works. If it does, I'll cancel my sale post and wait until I can buy two 17x7.5 Style 207M wheels for the front before I install everything.


Last edited by Suprgnat; 03-16-2023 at 01:23 PM.. Reason: Fixed broken link to photos
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      03-20-2015, 10:10 AM   #12
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2013 128i  [9.58]
Quote:
Originally Posted by andrey_gta View Post
anyway thanks Suprgnat for correcting some dimention errors.
BTW, I deal with dimensions all day, so I'm a bit OCD. Nothing personal
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      03-24-2015, 10:41 PM   #13
dojk
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Thanks guys for the responses.

Guess i will just have to go back to more reading to see my options.
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      03-15-2023, 03:24 AM   #14
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Quote:
Originally Posted by Suprgnat View Post
BTW, I deal with dimensions all day, so I'm a bit OCD. Nothing personal
Hello sprugnant.
Bringing an old thread Back
Do you know if z4 35is calipers are the same to 335i e90/e92 one? Do they share the same carrier too? Thank you
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      03-16-2023, 01:28 PM   #15
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2013 128i  [9.58]
Quote:
Originally Posted by NickTheQuick View Post
Hello sprugnant.
Bringing an old thread Back
Do you know if z4 35is calipers are the same to 335i e90/e92 one? Do they share the same carrier too? Thank you
RealOEM shows the 335i and the Z4 35is use the same front calipers and carriers.

Caliper Left 34116773201
Caliper Right 34116773202
Carrier 34116773203
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