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"I like big brakes and I cannot lie!" - BBK Wheel Fitment Thread - 240 Edition (17z, R Brakes, etc)

Sharingan 19

Sharingan 19

Member
Joined
Sep 5, 2013
Location
Jacksonville/ Tampa
So you're considering upgrading your brakes, and wondering if your current wheels will fit?....or more likely.... you've just mounted your new BBK and discovered that your wheels no longer fit! 😲 Either way, you've come to the right place!

The purpose of this thread is simple: Provide a resource of confirmed wheels / specs that fit with the most popular brake upgrades available for the 240.

In order for this thread to be useful the following information is required:
Wheel Name - Diameter x Width - Offset - Picture with BBK

If you have fitment information for a BBK that is not on the list, post the above information and it will be added.
If you have tried a specific wheel and know it doesn't fit, post that too!

(Brake kits are listed in order of size/ clearance required. It is fairly reasonable to assume a wheel that will fit a larger brake kit, will also fit any of the smaller kits as well.... basically you can work down the list, but not up)


1) Brembo 17z / Porsche Cayenne/ VW Touareg BBK
Currently offered by BNE Dynamics and originally developed by Homer , this kit utilizes massive 6 piston front calipers with 4 piston rears in combination with S60R/V70R front/rear 13" rotors. The "17" in 17z refers to the fact that a minimum wheel diameter of 17" is required to accommodate this caliper.

Note: that running the rear parking brake rotor hat increases the rear track width by approximately 5mm (-5 offset) this is NOT accounted for in this table but is the case with any BBK utilizing a turned down 240 rotor to retain the parking brake functionality.

WHEEL_NAMEDIAMETERWIDTHOFFSETEFFECTIVE OFFSET (ET)
*After Spacers		WHEEL POSITION
(F/ R/ F&R)		TIRE SIZEFITMENT NOTES:
Contributor...
Fifteen52 Tarmac179+7+7F & R245/40/17Homer: Clears strut up front. Rear Fenders need rolling.
Enkei RPF1179+22+6F & R245/40/17Homer: 16mm adapters
BBS LM178+200F225/45/17Homer: 20mm spacer
BBS LM179+20+5R245/40/17Homer: 15mm spacer
Volvo - Tethys177.5+49+24F & R235/45/17AnthonyHardy2: 25mm adapters
Volvo - Pegasus178+46+21F & R235/45/17AnthonyHardy2: 25mm adapters
BBS RX 239188+40+10F & R225/40/18Sharingan 19: 30mm adapters. Trimmed / folded rear fenders.


2) "R Brakes" Volvo S60R / V70R Brembo BBK
Currently offered by a number of suppliers including STS Machining this kit utilizes the Large 4 piston Front and rear Brembo Calipers that come stock on the Volvo S60R/V70R as well as the 13" F/R rotors. Similar to the 17z kit turned down 240 brake rotors are used to retain the parking brake functionality. 17" wheels are required to run this kit.
WHEEL_NAMEDIAMETERWIDTHOFFSETEFFECTIVE OFFSET (ET)
*After Spacers		WHEEL POSITION
(F / R/ F&R)		TIRE SIZEFITMENT NOTES:
Contributor...
HRE 525178+23+9F245/40/17TIPSP: 14mm spacers front to clear the caliper and the strut. -1.5 degrees camber. Had to roll front fender lip slightly on the front passenger side.
HRE 525178+23+13R245/40/17TIPSP: 10mm spacer on the rear. rear fenders rolled.
Enkei VR5178+32+7F225/45/172turbotoys: Continental Extreme Contact tires. Bilstein shocks, new IPD lowering springs. No rubbing.
Enkei VR5178+320R245/40/172turbotoys: Continental Extreme Contact tires. Trimmed inside fender well edge. Still rubbed under a heavy bump with Bilstein shocks and new IPD lowering springs. Recommend 235 width tire.
 
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EXAMPLE:

index.php
17z Porsche Brembo BBK
Fifteen52 Tarmac 17x9 +7 square - 245/40/17
- Redrilled to 5x108 - no spacers. Clears front struts. Rear fenders require rolling.
 
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STS has a brake fitting template for their Wilwood kit that they’ll email to you, no guessing needed. Just some paper and a printer.
 
Sharingan 19 said:
The Wilwood kit that's smaller than the R Brakes and designed to fit virgo wheels? ....who would need help finding wheels to fit those?
Click to expand...
lol. Theres a lot more to brakes then just diameter…
Yes it’s smaller than R brakes, but it’s more appropriately sized for the system. R brakes do work, but they really throw the brake balance off in the car and when driven hard on track you’re going to find that out really quickly. They also don’t fit Virgo’s, but they will clear a Motorsports designed 15” wheel with the smaller rotor option. Edit: They will fit virgos with a ~15mm spacer.

Sure, they’re not as big as a set of R brakes, but they’re exactly what’s needed for road racing and rally. So if you think you need more brakes than that, go ahead and get R brakes.
 
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culberro said:
lol. Theres a lot more to brakes then just diameter…
Yes it’s smaller than R brakes, but it’s more appropriately sized for the system. R brakes do work, but they really throw the brake balance off in the car and when driven hard on track you’re going to find that out really quickly. They also don’t fit Virgo’s, but they will clear a Motorsports designed 15” wheel with the smaller rotor option. Edit: They will fit virgos with a ~15mm spacer.

Sure, they’re not as big as a set of R brakes, but they’re exactly what’s needed for road racing and rally. So if you think you need more brakes than that, go ahead and get R brakes.
Click to expand...
I think you misunderstand the entire purpose if this thread. It is NOT to argue the merits of this BBK vs that BBK, it is only to provide a resource on wheel fitment, for those BBK's for which that information is not already readily available. Period.

However, since that is the conversation you are determined to have....
I am more than aware; I actually have Wilwood Superlites on my other car, which sees significant track use. The lack of seals on the pistons in that application I am completely fine with... in a road car that is less than ideal, hence the focus on calipers/BBK's actually designed for road use.

In racing cost of consumables is an important consideration, being able to run cheap 15" wheels /tires is beneficial; however for a street car that matters a lot less. I can't speak for everyone running the R Brakes/ 17z but I'll probably be doing more towing (my car running Wilwoods) than racing, lol. So Looks and fade resistance matter more than being able to run tiny wheels and play nicely with the stock master and rear brake setup (which is all being replaced anyway).
 
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Sharingan 19 said:
In racing cost of consumables is an important consideration, being able to run cheap 15" wheels /tires is beneficial; however for a street car that matters a lot less. I can't speak for everyone running the R Brakes/ 17z but I'll probably be doing more towing (my car running Wilwoods) than racing, lol. So Looks and fade resistance matter more than being able to run tiny wheels and play nicely with the stock master and rear brake setup (which is all being replaced anyway).
Click to expand...
I think you misunderstand what I was trying to do in my first post. It was to show that STS has a template, they could also make a template for the R-caliper kits they sell. This is very easy. Then there is no guess work.

I do understand the want for a BBK and to find the correct wheels, and I applaud your list. But the wheels are not the always the same clearance. There have been all sorts of tooling changes in wheels, and if you get one with an incompatible design... then your SOL. That's why I'm a fan of the brake template to check fitment.

If you'd like to discuss the merits and braking performance, F/R splits, weights, and cooling capacity (somewhat) of all the common brake kits, let me know.. I have that all compiled into my own brake calculator spreadsheet that I use for designing brake systems for fast road and race cars :)
 
culberro said:
I think you misunderstand what I was trying to do in my first post. It was to show that STS has a template, they could also make a template for the R-caliper kits they sell. This is very easy. Then there is no guess work.

I do understand the want for a BBK and to find the correct wheels, and I applaud your list. But the wheels are not the always the same clearance. There have been all sorts of tooling changes in wheels, and if you get one with an incompatible design... then your SOL. That's why I'm a fan of the brake template to check fitment.

If you'd like to discuss the merits and braking performance, F/R splits, weights, and cooling capacity (somewhat) of all the common brake kits, let me know.. I have that all compiled into my own brake calculator spreadsheet that I use for designing brake systems for fast road and race cars :)
Click to expand...
That is a fair point, and I suppose BNE could create a template for the 17z kit. However as of yet I am not aware of one, and I don't have the components in front of me even if it is as easy as you say to create one. While a template would help determine if your current wheels fit it would be of limited utility in helping one to purchase new wheels if i didn't have physical access to them.

While minor tooling changes do happen, they do not change the entire shape of a wheel. In fact I would be curious to know of a concrete example of such a change relevant to the topic at hand. Even if that is true, this is EXACTLY the type of information this thread is seeking to provide. Flying with a partially complete map is still better than flying blind.... no?

That does sound like an interesting conversation indeed! Albeit for another thread (please link if applicable), or DM conversation
 
Sharingan 19 said:
That is a fair point, and I suppose BNE could create a template for the 17z kit. However as of yet I am not aware of one, and I don't have the components in front of me even if it is as easy as you say to create one. While a template would help determine if your current wheels fit it would be of limited utility in helping one to purchase new wheels if i didn't have physical access to them.

While minor tooling changes do happen, they do not change the entire shape of a wheel. In fact I would be curious to know of a concrete example of such a change relevant to the topic at hand. Even if that is true, this is EXACTLY the type of information this thread is seeking to provide. Flying with a partially complete map is still better than flying blind.... no?

That does sound like an interesting conversation indeed! Albeit for another thread (please link if applicable), or DM conversation
Click to expand...
Most wheel companies will supply a template if you're buying new, so you can compare a wheel template with a brake template and you'd know if they'll all fit as a system. I'm sure you could also send a template to someone with used wheels that you are interested in and see what the fitment is like.

In regard to wheels changing shape through production, there are a few different OEM BBS wheels that have had some significant changes in the shape of the spokes/mesh with ~4-6mm of difference in the "same" wheel when comparing different eras of production. Food for thought.
 
i would ask ben, i remember seeing some mention of a template for those somewhere. I went with the sts wilwood kit personally after feeling how heavy those brembo calipers and rotors are
 
culberro said:
Most wheel companies will supply a template if you're buying new, so you can compare a wheel template with a brake template and you'd know if they'll all fit as a system. I'm sure you could also send a template to someone with used wheels that you are interested in and see what the fitment is like.

In regard to wheels changing shape through production, there are a few different OEM BBS wheels that have had some significant changes in the shape of the spokes/mesh with ~4-6mm of difference in the "same" wheel when comparing different eras of production. Food for thought.
Click to expand...
Great, theoretical points.... however we don't live in a world where both wheel templates and 17z templates both exist so until we do..... 🤷‍♂️

One of the great things about the 240 having such a narrow track AND an obscure bolt pattern is that adapters/spacers are a requirement for decent wheel selection and/or fitment about 90% of the time. Accounting for a 4-6mm difference via spacers/adapters is a simple and relatively inexpensive matter. Thought digested.
 
Great shot there @culberro


To add to the wheels count… maybe.

Running R-brakes.

17x8 HRE 525 with 1” lips with 245/40 17 all around.
Going off memory here. its been a while.
offset, if I remember its +23mm.
I am running 14mm spaces front to clear the caliper and the strut. -1.5 degrees camber upfront
18mm on the rear. rear fenders rolled.
Effective offset up front at +9mm and the rear at +5mm

Just got new tires - had to roll front fender lip slightly on the front passenger side and run a 14mm space in rear.

haven't installed rear calipers yet. That is next week. But the rears should have no problem clearing dropping rear spacer size to10mm for the double rotor height.

_DSC4296.jpg IMG_3046_2.jpg IMG_3045_2.jpg

IMG_4406.jpg IMG_4400.jpg IMG_4404.jpg IMG_4405.jpg IMG_4883.jpg IMG_4884.jpg

I could probably get the 17z to fit these. I would need to increase the front spacer thickness to 25mm for effective offset of-2mm.

Edit: 03/29/2024 - Forgot to show the rear brakes. See last 2 images. No problems with plenty of room on 10mm rear spacers.
 
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TIPSP said:
Just got new tires - had to roll front fender lip slightly on the passenger side and run a 14mm space in rear.
Click to expand...
this is a good point. The section width of tires varies, tables are great but you can't really just go "oh this fits". I'm running a 245 RT660 and it's like 3/4" wider than a 245 PS4S.

TIPSP said:
I could probably get the 17z to fit these. I would need to increase the front spacer thickness to 25mm for effective offset of-2mm.
Click to expand...
I've found the front end gets scrubby and pushy with negative offsets.
 
TIPSP said:
Great shot there @culberro


To add to the wheels count… maybe.

Running R-brakes.

17x8 HRE 525 with 1” lips with 245/40 17 all around.
Going off memory here. its been a while.
offset, if I remember its +23mm.
I am running 14mm spaces front to clear the caliper and the strut. -1.5 degrees camber upfront
18mm on the rear. rear fenders rolled.
Effective offset up front at +9mm and the rear at +5mm

Just got new tires - had to roll front fender lip slightly on the front passenger side and run a 14mm space in rear.

haven't installed rear calipers yet. That is next week. But the rears should have no problem clearing dropping rear spacer size to10mm for the double rotor height.

I could probably get the 17z to fit these. I would need to increase the front spacer thickness to 25mm for effective offset of-2mm.
Click to expand...
Shout out to TIPSP for the first organic post to contribute to the table! Updated!

Not sure what your plans are for the car, but the Dunlop ZIII is a solid all around tire! A little off the pace for competitive autoX but it was consistent on track and wears like iron, even in FL heat.

Stiggy Pop said:
this is a good point. The section width of tires varies, tables are great but you can't really just go "oh this fits". I'm running a 245 RT660 and it's like 3/4" wider than a 245 PS4S.
Click to expand...
Fair point, however RT660 are kinda the worst case scenario as far as measured width vs "tire size" in a street-ish tire.

Also, if anyone was is truly concerned they could just simply go to tirerack.com where they actually measure every tire and provide that information. Such a person would know that for example that....

... 245/40/17 Michelin PS4S measures 9.8" wide with a tread width of 8.3"
While a 245/40/17 Falken Azenis RT660 measures 10" wide with a tread width of 8.9"
 
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