Wheels - My head is gonna explode...

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  • Dan
    S2Forum Extremist
    • Jun 2008
    • 1242
    • Country: United Kingdom

    #1

    Wheels - My head is gonna explode...

    Hey guys... just need a quick sanity check please:

    When I bought my S2, it had what I thought were 4 identical 17 inch Avus wheels on it.

    Last week I had 4 new tyres fitted and an alignment. Somewhere during this the guys mixed up the rims and then realised they weren't all the same.

    When they were done, they said they had difficulty with the alignment due to one pair of wheels having a different offset to the other pair.

    Then the other day, I hit that pothole. I took the wheel to show Rob (GT500) and when we tried to order a new one, we found out that the one we had was a replica.

    The measurements of the damaged one are:

    17.5J x 17 ET 35

    ...and I'm assuming that the one on the other side is the same.

    Now today I came to try and figure out what's up with the rear ones. A quick look and they seem to be slightly different inside. Unfortunately, they don't seem to have any info on size/offset/part no./anything on them, except "Made in Germany".

    Since the same size tyre is fitted and the sidewall angle looks exactly the same, I'm assuming that the rear, like the front, is 17.5J.

    This would yeild that just the offset is different. I was trying to measure that by hand, but it was proving difficult with wheel still on car and I don't have a trolley jack handy right now - I'll try and get one at the weekend.

    After appealing on the forum I've been offered a pair of good condition Avus reps from dm80 on here. They're ET42 and he's had them on his Coupe without spacers.

    Obviously this is 7mm less inner clearance - but I presume this will be fine? I mean, they obviously were on his...?

    Now I'm also wondering, if I fit those to the front, what do I do about the rears? Without knowing what offset they are... I dunno, I guess I don't need to, but... meh. Should I just leave them?

    What's the most offset you can put on an S2 with a 7.5J before it starts to interfere, anyway?

    Finally - when we had all the wheel bolts out last weekend after removing all 4 wheels, we found that several of the bolts were shorter and some were longer bolts that had been cut down. Yet the longer ones went in fine and seemed to be the ones that were actually the correct length.

    Any ideas why this would be done?
    1993 ABY Coupe | BMW R1200 GS
    A6 3.0 TDI Quattro (aka Sonic's 'ring support/cargo vehicle )
  • s2_wot
    S2Forum Fiend
    • Aug 2006
    • 2178

    #2
    What a nightmare.

    The only safe thing with the bolts is to remove the wheels and verify that you've got enough thread coming out the back to properly engage the hub. Also check the shape of the head of the bolt where it engages the wheel for a good fit. ET39 is the biggest offset that I have personally verified.

    Have you a brake upgrade in there? Is it possible that some messing was done with a spacer between the disc and the hub to help with caliper fitment. That should be easy to check as this would also give cause for longer bolts.

    The "made in germany" would be good enough on a spare for instance. Best to get the wheels off and verify the offsets for yourself. I'd try to get some genuine wheels as per your wanted thread and at least have them for when the next rep bursts.

    HTH somehow
    Shane

    Comment

    • Dan
      S2Forum Extremist
      • Jun 2008
      • 1242
      • Country: United Kingdom

      #3
      Originally posted by s2_wot
      What a nightmare.

      The only safe thing with the bolts is to remove the wheels and verify that you've got enough thread coming out the back to properly engage the hub.
      We did this and... it seems kinda borderline. I think I'm just gonna pick up a new set (where's best?) at some point.

      Originally posted by s2_wot
      Have you a brake upgrade in there? Is it possible that some messing was done with a spacer between the disc and the hub to help with caliper fitment. That should be easy to check as this would also give cause for longer bolts.
      Yeah, got 996s on the front. I dunno, I still dunno why someone would cut the bolts off shorter?

      Originally posted by s2_wot
      The "made in germany" would be good enough on a spare for instance. Best to get the wheels off and verify the offsets for yourself. I'd try to get some genuine wheels as per your wanted thread and at least have them for when the next rep bursts.
      Yeah, probably - unfortunately I don't have the money to buy 4 new wheels right now, so the back ones are going to have to wait a bit.

      Thanks
      1993 ABY Coupe | BMW R1200 GS
      A6 3.0 TDI Quattro (aka Sonic's 'ring support/cargo vehicle )

      Comment

      • Rusty
        Super Moderator
        • Jun 2004
        • 18953
        • Country: United Kingdom

        #4
        I was tempted to sell off my Dezents, they're 8x17 ET35, let me know if they're the sort of thing you'd be interested in...



        Offset depends on the wheel design really, a replica generally has more material on it, as it's not such a good quality product and hasn't been designed so much as copied.

        I'd say that if they clear the brakes then you're OK, you'll lose 1/4" + 7mm on the outer edge, so nearly 14mm per side, but to get things up and running, you might have to lump it - you can always get some 10mm spacers on there at a later date.

        Overall, the best fit on an S2 is 8J ET35, hence why so many run this
        Cheers'en, AndyC
        1994 ABY Coupe - Projekt Alpinweiss

        Comment

        • dm80
          S2Forum Maniac
          • Apr 2005
          • 812
          • Country: Scotland

          #5
          All I can add to this is that ET42 would be 5mm further in than stock 16 Avus. However, it is stamped on my reps that they are ET42 but look stock and not further in. Go figure as my American neebur would say..

          Comment

          • Dan
            S2Forum Extremist
            • Jun 2008
            • 1242
            • Country: United Kingdom

            #6
            Rusty: Tempted... but I don't have the money to take a full set off you right now.

            dm80: I think I'll go with your set - just hope the calipers fit under. I guess worst case, I get some spacers.
            1993 ABY Coupe | BMW R1200 GS
            A6 3.0 TDI Quattro (aka Sonic's 'ring support/cargo vehicle )

            Comment

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