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On 23 Dec 2002 at 10:18, Per Lindgren wrote: > Jim Adney wrote: > >I also thought the J meant the safety profile. You can easily feel this bump > >from the outside. It's the bump that the tire bead has to pop over when you > >install it. Early rims don't have this at all, > > > This is correct, Jim. Since the rim has this bump, it will look like a J > shape from the edge. This bump does in fact help the tire to stay > seated. Still, it is possible to knock a tire off this bump, I've BTDT. Someone else posted that the J meant the offset, but I disagree with that. All the late VW safety (with the bump) rims have the J, regardless of the offset. I have a Mercedes factory manual which refers to the J as meaning a safety rim and also mentions a K (and maybe an L) rim. It does not mention what the difference might be. -- Jim Adney jadney@vwtype3.org Madison, WI 53711-3054 USA ------------------------------------------------ To unsubscribe, E-mail to: <type3-off@vwtype3.org> For more help, see http://vwtype3.org/list/