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Unread 12-25-2013, 07:31 AM   #1
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Default Modifying alloy rim bolt pattern

Hi all!

I was wondering is it safe to modify bolt pattern from these alloys (104,3 mm 1/2 inch hole x4) to fit 108 mm M14 1.5 x4 pattern. 14mm bolts fit through these half inch holes already so only modification that would be needed is to mill these holes few millimeters towards edge of the rim. Maybe also extend the nut holes a bit too. I have access to manual and automatic milling machines at school so manufacturing is not a problem.

I don't have original nuts for these rims and those would not fit my hubs anyway. Is it safe to use for example standard m14 1.5 thread hex bolts with standard washers? The holes in these alloys are flat (not conical). Or can you think better fastening solutions?

These wheels are original Saab 99/900 EMS wheels but my 1988 900 is a bit too new. Wheel hubs changed earlier the same year. Would really like to have them on.

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Unread 12-25-2013, 11:55 AM   #2
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Don't mess around with wheel attachment.
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Unread 12-25-2013, 02:26 PM   #3
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It's never okay to modify rims.
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Unread 12-25-2013, 05:30 PM   #4
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A safer option would be to buy a wheel adapter (hub and wheel centric of course) to adapt the wheel to whatever fitment you need.
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