Hello, new forum member here. My SO has purchased a SQ5. Expecting delivery within a week or so.
Our model is coming with the 21" Optional tires in which we never really had a choice. The roads where I live in Northern Alberta are far too crappy for that low of an aspect ratio for her tastes. I drive an Evo X with a 265/35 so I know what she means.
Anyhow to the point: I am looking to see if the stock wheel size from the regular Q5 will fit and clear the calipers etc.
I am looking for hopefully 18's in a narrow wheel for winter. Anyone have any ideas? I will be buying an aftermarket winter wheel/tire combo.
We will be replacing the 21"s for summer as well but that can wait until spring. (Probably with 19s or 20s.
Still not confirmed they even need 19's despite the echo's.
The 19" stuff on SQ's remains internet echo as far as I know. I have not seen a single post yet where anyone has first person tried to fit either 19's, or especially 18's on it. Nor has there been an answer to my simple suggestion someone spend about 30 seconds and look at what size spare (the wheel diameter, not the tire) is back there on an SQ. That will be another obvious clue about wheel diameters. The suggested official Audi fitments don't mean those are the only ones or the minimum ones that fit either AFAIK.
As I've said before, my D3 A8 with 385mm brakes of very similar design to the SQ's (slightly smaller at 380 mm) clears the brakes with factory 18's for that vehicle. My car has factory (optional) 20's but the factory spare is a baseline 18". The analog here would be baseline 18" Q5 wheels that are kind of dime a dozen available in the U.S. and could be good donor candidates for those who want narrow widths and higher aspect ratios for winter.
There is nothing magical about the SQ brakes beyond simple sizing and they use a relatively high volume basic floating twin piston caliper design, apparently shared w/ the D4 A8 3.0T by the way, and then with some black paint and a logo on an interchangeable clip. Perfectly competent design and found on other various higher power Audi sedans of fairly recent vintage and even up into some prior gen midsized BMW M's. They aren't at all like the bulky (and nice) many piston Brembo style used on RS4's and RS5's that do seem to require 19's even with only a 365mm rotor. The caliper shaping makes all the difference here and the newer style caliper designs in large measure are to allow rotor sizes to step up without extra big wheels, especially on the sedan/car side of Audi's products.
Someone please try an 18 and 19" factory wheel fitment onto an SQ5, or at least report on the spare wheel size. Anyone with standard Q5 wheels or S5 factory wheels would have prime donor test candidates.
Nor has there been an answer to my simple suggestion someone spend about 30 seconds and look at what size spare (the wheel diameter, not the tire) is back there on an SQ. That will be another obvious clue about wheel diameters. The suggested official Audi fitments don't mean those are the only ones or the minimum ones that fit either AFAIK.
According to ETKA, there are 2 spare wheels available for Q5.
6.0Jx18H2 ET36 - 2009 and later
6.0Jx18H2 ET32 - 2013 and later, 'S' variant
Thanks! And thus, how does an 18" spare fit an S, but ...
the echo's keep bouncing around the forum that supposedly SQ's take 19's as a minimum? Someone should test fit a factory Q5 18" on an SQ, and hopefully save folks a bunch of money who want narrower and higher profile snows, plus actually find a home for the sets of 18's around at the lowest clean OE wheel prices in general.
For those who want a size bigger--if it gets sorted factually to be a "want" rather than "need" on SQ's--19" Q5 OE wheels are also pretty easy to find around for meaningfully less than 20's, and at 8" width rather than 8 1/2" would do better w/ a narrower tire choice for winter. Sometimes specific tire choices in one wheel diameter or another can drive some fine tuning of the final wheel decision too.
I just got 19" TSW Donington wheels put on my SQ5 for a winter set, after Discount Tire attempted a test fit of Konig Crown 18"s - which they were so-so sure would fit (they did an install on an S5 the night before without issue, they told me [5mm smaller caliper? And a different caliper geometry?]). I was very clear with them that I didn't think 18's would fit, and at least with the Crown that was true. The back of the caliber hit the back of the inside of the wheel, enough to take off some paint from the caliper, and enough for them to comp me the difference in the 18" Konig/Michelin Latitude setup to 19" TSW/Bridgestone Bizzak setup (that mistake cost them a pretty penny). The missing paint on the caliper is certainly cosmetic only and not even remotely visible, but the manager was terrified, rightfully so.
Another thread discussed the 18" debate in even more detail, and some poster(s) were saying that the wheels TireRack suggests are very likely to fit okay - because it sounds like they do a real test-fit of everything before listing it on their site. I'd want to hear something from the mechanic who did that test fit before ordering, because it's pretty hard to tell if the wheels will fit otherwise. But as the spare is 18", it's obviously possible to have a wheel that clears the caliper. I didn't have a chance to try stock Q5 18"s as I haven't seen any available in my area.
I'm happy with the 19" TSW's thus far - need some snow to be sure
Look at your (18") spare and you will have an answer.
I love these posts about the SQ5 "big" brakes all the time. My A8 with 385mm rotors (SQ + 5 more mm) and similar calipers will run 18's, and came that way as a base set up in Europe. It's tight, but works; I've done it while having my normal ones refinished. On the Q5, you need to watch the offset and spoke shaping, but like the A8 calipers these are fairly well "rounded off" near the outer spoke area. The big honkin' 6 and 8 piston Brembos found on an RS4 or RS5 or Euro RS6's (and Porsches and...), plus the old bulky HP2's from old S4 and A6 2.7T's are/were where more of the side clearance issues are.