Re: [T3] Bias plys

[Jim Adney <jadney@vwtype3.org>]

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


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