XBimmers X1   XBimmers X1
  XBimmers X1

Go Back   XBimmers | BMW X1 Forum > BMW X1 Forums > General BMW X1 (E84) Forum

Post Reply
 
Thread Tools Search this Thread
      05-24-2016, 08:21 PM   #1
spoolinX1
Private
5
Rep
73
Posts

Drives: X1
Join Date: Feb 2015
Location: New York

iTrader: (0)

Will they fit - 7 Series Wheels?

Local deal on some ASA GT1's that were on a 2013 7 series. 19x8.5 in all four corners with ET35 offset. Plan to equip them with some 225/40R19 rubber.

I don't know very much about the ASA brand but there seem to be quite a few 3 series on Google Images rocking them and they look pretty sweet.

I looked up the 7 series wheel specs and compared them to our X1 and everything is the same except for the lug size. M14 on the 7 vs M12 on our cars.

Will I be ok to pull the trigger?
Appreciate 0
      05-24-2016, 10:08 PM   #2
vstolpner
Lieutenant
6
Rep
420
Posts

Drives: 2013 BMW X1 xdrive28i
Join Date: Sep 2015
Location: Vancouver, BC

iTrader: (0)

I had the same lug size difference on my set of wheels (off of a 5 series). Only had them on for a couple months but didn't have any issues. The wheel sits on the hub (which should be same but double check) and on the rim of the lug nut. Since it doesn't sit on the actual thread I don't think the 2mm difference in thread size should matter.
Appreciate 0
      05-25-2016, 01:03 PM   #3
Aerospike
Private
United_States
0
Rep
56
Posts

Drives: 2014 X1 35i
Join Date: Oct 2014
Location: The Beach, NC

iTrader: (0)

I would check the weight of the wheels vs. the OEM X1 19" first.

While the wheel doesn't sit on the studs, they are still what's reacting the loads from the car. The 2mm difference in thread size results in ~ 27% reduction in the stud cross section area under loads from acceleration/deceleration/turning. It's most likely that BMW used larger studs to react the V12 7 Series' 553 ftlbs of torque and the + 5,000 curb weight or whatever the max torque and weight were for the 5 series. However, heavier wheels exert larger forces on the studs, throw in a few thousand cycles of acceleration, braking, and turning and you get cracks.

Not saying this will happen, just thinking why BMW would use two different size studs and how it affects what you're doing.
Appreciate 0
      05-25-2016, 01:50 PM   #4
vstolpner
Lieutenant
6
Rep
420
Posts

Drives: 2013 BMW X1 xdrive28i
Join Date: Sep 2015
Location: Vancouver, BC

iTrader: (0)

That's a fantastic explanation Aerospike. I actually went with the original wheels because I found them to be a little lighter (so better fuel economy) and they looked better. I didn't compare the exact weights, just by how they felt.

Actually weight of the tire was a strong consideration for getting rid of my RFT's as well
Appreciate 0
      05-25-2016, 02:33 PM   #5
Aerospike
Private
United_States
0
Rep
56
Posts

Drives: 2014 X1 35i
Join Date: Oct 2014
Location: The Beach, NC

iTrader: (0)

Yep, I hate RFT's. I'm replacing mine on Friday.
Appreciate 0
      05-26-2016, 03:52 PM   #6
spoolinX1
Private
5
Rep
73
Posts

Drives: X1
Join Date: Feb 2015
Location: New York

iTrader: (0)

Seems like weight should not be an issue. The stock 19" X1 rear wheels are showing at 13.72kg which is 30.24 lbs. Now add in the weight of a run flat tire on top of that.

The aftermarket wheels I am purchasing are 28 lbs plus non-run flats.

I think I should be ok but I totally agree that they put a bigger stud to carry the heavier weight of the vehicle and hold up under the extra TQ and/or HP.
Appreciate 0
      05-26-2016, 10:19 PM   #7
spoolinX1
Private
5
Rep
73
Posts

Drives: X1
Join Date: Feb 2015
Location: New York

iTrader: (0)

So... I've been duped. Rather odd situation. Let me know your honest opinion.

Guy told me they were from a 2013 7 series. I picked them up, was very satisfied. Got home and noticed that there was a small dangling tag hanging from one of the spokes. It read "2010 BMW B7 Alpina." That set me off because it wasn't year 2013 as he told me. I looked up the Alpina and found that it has a slightly more aggressive offset than a standard 7 series.

This prompted me to measure the offset. Damnit. It wasn't ET35 as I was told. It was ET15. Square setup. 19x8.5 with a 15mm offset. So. What do I do now? I'm guessing that's way too aggressive for our cars, especially since I plan to lower it on H&R's/Billsteins this Summer.

Do I just relist them on Craigslist or ebay or do I try to give them a shot. The problem is that there are no tires on the rims, so I can't even throw them on to check fitment with the car sitting on the ground.
Appreciate 0
      Yesterday, 12:23 AM   #8
tristanpaglia
BMW IS LIFE
tristanpaglia's Avatar
Canada
2
Rep
110
Posts

Drives: 2012 BMW X1
Join Date: Jul 2014
Location: Canada

iTrader: (0)

ET15 is very aggressive. They will stick out a lot, too much for my liking.
I would say try to jack up the car and throw just the rims on to see how far they stick out.
Appreciate 0
      Yesterday, 02:00 AM   #9
vstolpner
Lieutenant
6
Rep
420
Posts

Drives: 2013 BMW X1 xdrive28i
Join Date: Sep 2015
Location: Vancouver, BC

iTrader: (0)

Agree to just try it. I'm not sure how safe this would be, but I would try to place something underneath the rims so i could actually lower the car - not tires, but maybe some very thick heavy rubber or similar.
Appreciate 0
      Yesterday, 09:11 AM   #10
spoolinX1
Private
5
Rep
73
Posts

Drives: X1
Join Date: Feb 2015
Location: New York

iTrader: (0)

Yeah, I don't know guys. I played around with an offset calculator. I think maybe it's a bit too aggressive for my own personal taste. There will be an added 6.3mm of strut clearance, which is great, but the face of the rims will poke outwards 1.25" (31.7mm) further than my stock 17's.

I mean, that's probably too far, right?
Appreciate 0
Post Reply

Bookmarks

Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Forum Jump


All times are GMT -4. The time now is 04:06 PM.




xbimmers
xbimmers
Powered by vBulletin® Version 3.7.0
Copyright ©2000 - 2016, Jelsoft Enterprises Ltd.
1Addicts.com, BIMMERPOST.com, E90Post.com, F30Post.com, M3Post.com, ZPost.com, 5Post.com, 6Post.com, 7Post.com, XBimmers.com logo and trademark are properties of BIMMERPOST