19x9.5 ET36 on 2015 allroad

[MacRoadie]

I've looked through tons of threads regarding wheel size options for the B8 allroad, and keep finding posts regarding fender clearance but none addressing caliper clearance. My plan is to mount 19x9.5 wheels, with 275/35R19 G-FORCE COMP-2 A/S tires on a stock ride height 2015 Premium Plus allroad (see pic). I understand the stock offset for the OEM 18" wheels is ET26 (but that could be wrong), and my plan is to run the 19" wheels with a ET36 offset.

Understanding the stock ride height, and no suspension mods, I think the tires will be fine relative to strut and fender lip clearance, but with the 10mm change inboard in offset, do I run the risk of rubbing the calipers?

First time post, so thanks in advance for the help.

[adamazing]

Offset has virtually no bearing on spoke-to-caliper clearance. Offset impacts in how far inward or outward the barrels of the wheel will sit. The specific spoke design of the wheel will mostly dictate caliper clearance. You can have a wheel with sweeping spoke arches that will clear a caliper, or a wheel of the exact same offset with shallow spokes that wont.

[MacRoadie]

Offset has virtually no bearing on spoke-to-caliper clearance. Offset impacts in how far inward or outward the barrels of the wheel will sit. The specific spoke design of the wheel will mostly dictate caliper clearance. You can have a wheel with sweeping spoke arches that will clear a caliper, or a wheel of the exact same offset with shallow spokes that wont.

See, that’s what I’ve always assumed. However, today in doing some fitment research, I used wheel-size.com to do some comparisons between stock and various aftermarket wheel sizes, and with the 9.5” wheels and the ET36 offset, a warning came up regarding brake clearance.

"Rim offset is more than OE, so brake support will be closer to the rim. Make sure they are not touching."

[adamazing]

See, that’s what I’ve always assumed. However, today in doing some fitment research, I used wheel-size.com to do some comparisons between stock and various aftermarket wheel sizes, and with the 9.5” wheels and the ET36 offset, a warning came up regarding brake clearance.

"Rim offset is more than OE, so brake support will be closer to the rim. Make sure they are not touching."

You can make that argument if you're comparing different sizes of the exact same wheel.

For example:

• AG M590 wheels wheel in two different offsets; +45 and +35. The +45 will have slightly less spoke-to-caliper clearance because the design is constant between both wheels.
• But if you compare M590's with M310's, all bets are off because how the spoke arcs from the hub to the barrel will be different between both models.

Although this diagram is specifically intended for multi-piece wheels, the concept is the same for regular cast wheels. Spoke arcs and faces for any wheel can differ from model to model. (Ignore the fact they used different wheel designs for this visual - assume they are all the same design.)



You can see how a wheel with a more concave spoke design [like Spec 1] will have less caliper clearance closer to the hub. Whereas a design like Spec 2 will have plenty of space, even when width and offset are equal between the two.

[MacRoadie]

You can make that argument if you're comparing different sizes of the exact same wheel.

For example:

• AG M590 wheels wheel in two different offsets; +45 and +35. The +45 will have slightly less spoke-to-caliper clearance because the design is constant between both wheels.
• But if you compare M590's with M310's, all bets are off because how the spoke arcs from the hub to the barrel will be different between both models.

Although this diagram is specifically intended for multi-piece wheels, the concept is the same for regular cast wheels. Spoke arcs and faces for any wheel can differ from model to model. (Ignore the fact they used different wheel designs for this visual - assume they are all the same design.)



You can see how a wheel with a more concave spoke design [like Spec 1] will have less caliper clearance closer to the hub. Whereas a design like Spec 2 will have plenty of space, even when width and offset are equal between the two.

That's always been my assumption. Just needed a second opinion before I shell out the dough. Thanks for confirming.

[Smac770]

Here's from a B8.0 A4 with 1LA (320mm) brakes. The B8.5 A4 allroad should be similar. You'll simply have to check the wheels you want to use for the necessary clearance. There's no spec for a wheel that designates caliper clearance.

If the new wheels have a 66.5mm center bore, 150mm mating face, the spokes rise from the mating face at at least a 45° angle to at least 30mm above the mounting face, and stay at that height or more until 200mm from center, you should be fine.

A4 1LA (320mm) front caliper.jpg

[MacRoadie]

Here's from a B8.0 A4 with 1LA (320mm) brakes. The B8.5 A4 allroad should be similar. You'll simply have to check the wheels you want to use for the necessary clearance. There's no spec for a wheel that designates caliper clearance.

If the new wheels have a 66.5mm center bore, 150mm mating face, the spokes rise from the mating face at at least a 45° angle to at least 30mm above the mounting face, and stay at that height or more until 200mm from center, you should be fine.

A4 1LA (320mm) front caliper.jpg

I think that caliper max intrusion point would be the only potential issue. As your photo indicates, it's only 25mm outboard from the mounting face, so we should be good. As a pure precaution, I ordered a set of 5mm spacers and an extra set of lug bolts (+5mm) just in case I have to push the wheel out a little. Really hate spacers with a passion, especially with hub-centric wheels, but I'm ready just in case.

[Smac770]

Yeah, if my x8 et47 OEM wheels clear the scenario, I've got to imagine your x9.5 et36 would. Mine only have 54mm from the mounting face to the outer rim lip; half that space is needed to clear the caliper. But yours will have 84mm from the mounting face to the outer rim lip. Over an inch more room to work with. So long as the spokes come up and away when they leave the mounting face, I would find it hard to imagine they will have a conflict.

[MacRoadie]

Looks like it worked out perfectly. No rubbing, and flush with fender flares.

[a5matt401]

Look great! Really like the wheel color, and how well it ties in with the lip, side skirt and fender flares. Any plans for future suspension mods?

[MacRoadie]

Look great! Really like the wheel color, and how well it ties in with the lip, side skirt and fender flares. Any plans for future suspension mods?

I've been debating the suspension a lot over the last few days. On one hand, I love a more aggressive stance (my weekend car is my 2017 Z06 Vette), on the other hand I kinda like that whole "allroad" idea and the car will definitely be seeing some mountain snow this winter. I may end up doing a compromise, and swapping in some S4 springs which I understand are slightly shorter, but allow for a better ride than the HR-type lowering springs. We shall see.

The wheels are almost a dead match for the fender flares and skirt. You can really see it in the center caps.

[MacRoadie]

Look great! Really like the wheel color, and how well it ties in with the lip, side skirt and fender flares. Any plans for future suspension mods?

H&R Sport springs (28969-1)
Bilstein B8 shocks (24-145992 front, 24-145985 rear)

Happy with the look as it sits for now. At first I thought the front came down too far, but now that I see it in the daylight (just installed the suspension last night), I'm liking it more. I was aware of the possible rake issue before I installed, and the rear definitely came down less than H&R's estimated 1.4", but I'm going to withhold judgement until it has a chance to settle in some (although I doubt it will drop significantly) and I didn't want the ass in the weeds as I do carry people and stuff in the car and I don't want any rubbing. I definitely wanted to go with the Bilstein B8's for handling as well.

[Peter.dupuis]

Will 19x9.5 with 275/40/19 tires fit on a stock allroad without rubbing


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[eurotuner123]

Looks like it worked out perfectly. No rubbing, and flush with fender flares.

I really love this setup and have been looking for this style and color wheel. Can you provide the wheel brand, model and spec? Thanks.