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2Addicts | BMW 2-Series forum Technical Topics Wheels and Tires -- Sponsored by The Tire Rack Anyone running 17in wheels?

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      02-12-2019, 11:03 AM   #1
GrimJaw
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Anyone running 17in wheels?

If so what are you running? Why?
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      02-12-2019, 11:18 AM   #2
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I had BBS SRs when I was running 17" - not a lot of 17" options that will clear the blue brakes. I loved them, have them on GF car now actually. Those work, SX is a different style that works as well. Enkei makes a few options.

I loved the 17" Sportstick will chime in as well. Very little compromise in terms of handling, huge upside in durability and cost.

Only went back to 18" through a long saga of related changes. Got dad Apex Arc8 for his E46 then wanted the F23 to look similar but updated and the EC7 that I chose 18" was only option. Added benefit is they clear the BBK so I can use that on F23 then transfer stock brakes to F31.
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      02-12-2019, 11:23 AM   #3
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Agree to pros/cons. 17" is far more compatible with the "lunar surface" roads we have in Moonchigan. If well chosen, a 17" wheel is also lighter, directionally improving acceleration, braking, ride comfort, etc., all the benefits of a lower rotating mass. Aesthetics are personal, but BBS SR certainly brings a lot of style to a 17" wheel while also clearing the blue MSport calipers. I've never found anyone near my car with a tape measure checking my wheel diameter!
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      02-12-2019, 11:26 AM   #4
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      02-12-2019, 04:28 PM   #5
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Originally Posted by GrimJaw View Post
If so what are you running? Why?
BBS SR 17X7 ET35 in Bright Silver with 225/45-17 Michelin X-Ice Xi3.

I needed a winter set for my monthly winter outing and found this forum member's set in the classifieds for $750. The price was right and he was within driving distance.
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      02-12-2019, 04:49 PM   #6
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Quote:
Originally Posted by Sportstick View Post
Agree to pros/cons. 17" is far more compatible with the "lunar surface" roads we have in Moonchigan. If well chosen, a 17" wheel is also lighter, directionally improving acceleration, braking, ride comfort, etc., all the benefits of a lower rotating mass. Aesthetics are personal, but BBS SR certainly brings a lot of style to a 17" wheel while also clearing the blue MSport calipers. I've never found anyone near my car with a tape measure checking my wheel diameter!
Sportstick, since you're the engineer, I'd like to understand this a bit better if you don't mind. Of course the 17" wheel will be lighter but the higher profile of the tire would make the tire weigh more than the 18" tire so wouldn't overall weight of wheel/tire combo be roughly the same? Or does it have more to do with the weight closer to the hub being lower? I'm thinking about picking up a set of 17's to throw snow tires on.
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      02-12-2019, 06:05 PM   #7
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Originally Posted by hwntime View Post
Sportstick, since you're the engineer, I'd like to understand this a bit better if you don't mind. Of course the 17" wheel will be lighter but the higher profile of the tire would make the tire weigh more than the 18" tire so wouldn't overall weight of wheel/tire combo be roughly the same? Or does it have more to do with the weight closer to the hub being lower? I'm thinking about picking up a set of 17's to throw snow tires on.
Actually, retired vehicle product planner who worked with engineering teams for a few decades, so I picked up much of what I learned through the informal training of colleagues. The answer to your question is that the weight reduction of the wheel can be greater than the weight increase of the added thiner part of tire - more sidewall - depending on the wheel chosen, so the net change is a mass reduction. One of my favorite sayings I learned back then was, "Designers love big wheels. Engineers don't!" I heard that one when I got shot down for a larger quite good-looking wheel I wanted to add to a vehicle line I was managing. The added option margin didn't outweigh the detriment to the CAFE loss from reduced fuel economy.
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      02-12-2019, 09:40 PM   #8
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Originally Posted by hwntime View Post
the higher profile of the tire would make the tire weigh more than the 18" tire
FWIW, Tire Rack shows 225/45-17 & 225/40-18 PS4 & DWS06 all weighing 21#. No doubt there are differences that don't show up when the weights are rounded to the nearest pound (which is what I assume the tire manufacturers do).

I can't recall where I read it, but somewhere I came across info stating that relatively more steel is required to maintain the shape of a lower profile tire, thereby adding back some or all of the weight that was lost when the amount of rubber, etc. was reduced.
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      02-14-2019, 11:08 PM   #9
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I've been wanting these bbs wheels. Yet, I guess they are a more stable quality rather than performance. I'm honestly looking for a wheel that is durable, but still provides at least stock performance. Would these wheels be suitable? Or are they too heavy compared to oem wheels. If I bought these bbs wheels I'd be switch to Michelin's rather than keep the run flats. That would also mean the added weight of a spare in the trunk. (Pics below)
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      02-16-2019, 06:56 PM   #10
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I actually have two sets of 17" wheels, in addition to the stock 18" staggered summers the car came with.

Like many, I have 17's for my winter tire set. Cheaper, and the fatter sidewall for rougher winter roads were the key things.

I also have a set of cheap 17's with Hankook RS4 for track use. For the track I went 17" because the combination wheel/tire was about 2 lb. lighter than any cheapish 18". Fancy forged 18" wheels could go lighter, but I wasn't going to spend $400+/wheel. Also, the 17" tires are cheaper than the 18" (by about $30 each), so when I use up the track tires it's cheaper to replace them.
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      02-18-2019, 04:57 PM   #11
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When you see a giant SUV with about 2" of rubber between the rim and the road, just laugh. These are almost always black, all for show

Applaud the enthusiasm but decry the lack of automotive savvy

I am an engineer agree with Sportstick and dradernh
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      02-18-2019, 06:02 PM   #12
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Quote:
Originally Posted by GrimJaw View Post
I've been wanting these bbs wheels. Yet, I guess they are a more stable quality rather than performance. I'm honestly looking for a wheel that is durable, but still provides at least stock performance. Would these wheels be suitable? Or are they too heavy compared to oem wheels. If I bought these bbs wheels I'd be switch to Michelin's rather than keep the run flats. That would also mean the added weight of a spare in the trunk. (Pics below)
BBS makes high-quality wheels, and if the SX's weigh more than the OEM units it's not by much. At that size and weight, and with them being manufactured in Germany, they'll certainly be as durable as you can ask for.
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      03-10-2019, 08:04 PM   #13
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Quote:
Originally Posted by GrimJaw View Post
If so what are you running? Why?
OEM - because I like the BBS mesh look. I like the style of meaty tires, and the ride is better/quieter.
I'm sure there's some weight benefit that aids in handling, accelerating, braking, etc. but that's mostly meaningless in commuting.
Also, I didn't want to upgrade the brakes and getting larger rims sort of requires larger brakes too in order to fill the extra air space - purely aesthetic of course (which is the point of larger rims right )

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      03-14-2019, 10:01 PM   #14
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I'm thinking of running 17's for daily, anyone have any feedback on the MT6 Vita specifically the 17x7.5 40mm offset. Will it clear the Msport brakes?
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      03-15-2019, 10:39 AM   #15
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Quote:
Originally Posted by dradernh View Post
BBS makes high-quality wheels, and if the SX's weigh more than the OEM units it's not by much. At that size and weight, and with them being manufactured in Germany, they'll certainly be as durable as you can ask for.
I ran over a snow covered curb once, completely destroying my Blizzak but the BBS wheel was unharmed. They can definitely take a beating.
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      03-15-2019, 03:14 PM   #16
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I forgot about this possibly lowering ride height
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