 Correct lug nut for Perdrini wheel? See pics |
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| roundtwo |
 Dec 26 2023, 11:10 PM
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#1
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Member  Group: Members Posts: 282 Joined: 9-February 20 From: Petaluma, CA Member No.: 23,905 Region Association: Central California 
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First time taking off the wheels for new tread. The lug nut pictured as B is what’s on the car. Is that the correct lug nut for the wheel or should it be the lug nut pictured as A ? Different shoulders/flang as I’m not sure which is stock for the rims.
Is bolt be the correct length? Seams about right as the hub of the wheel is fairly thick. I forgot to measure the bolts   |
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| bzettner |
Dec 27 2023, 05:22 AM
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#2
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Member Group: Members Posts: 211 Joined: 2-June 13 From: San Antonio, TX Member No.: 15,951 Region Association: Southwest Region |
Almost 100% that my Pedrinis use a 40mm lug bolt (IMG:style_emoticons/default/beer3.gif)
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| 914Sixer |
Dec 27 2023, 06:54 AM
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#3
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914 Guru Group: Members Posts: 8,903 Joined: 17-January 05 From: San Angelo Texas Member No.: 3,457 Region Association: Southwest Region
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Bolt A has the correct flange (ball seat cup) and needs to be 40 mm.
Bolt B is totally incorrect. Here is a more correct option. Factory bolts had 19 mm heads, these are 17mm. Attached thumbnail(s) 
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| roundtwo |
Dec 27 2023, 11:01 AM
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#4
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Member Group: Members Posts: 282 Joined: 9-February 20 From: Petaluma, CA Member No.: 23,905 Region Association: Central California
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| NARP74 |
Dec 27 2023, 11:13 AM
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#5
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Senior Member Group: Members Posts: 1,073 Joined: 29-July 20 From: Colorado, USA, Earth Member No.: 24,549 Region Association: Rocky Mountains |
Same for Mahle and Pedrini I am guessing?
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| GaroldShaffer |
Dec 27 2023, 10:17 PM
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#6
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You bought another 914? Group: Benefactors Posts: 7,624 Joined: 27-June 03 From: Portage, IN Member No.: 865 Region Association: None 
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QUOTE(NARP74 @ Dec 27 2023, 11:13 AM)  Same for Mahle and Pedrini I am guessing? Yes. Fuchs, Mahle and Pedrini all use the same 40mm lug bolt. |
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| BENBRO02 |
Dec 28 2023, 10:34 AM
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#7
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Member Group: Members Posts: 482 Joined: 6-March 15 From: Nokesville, Virginia Member No.: 18,493 Region Association: MidAtlantic Region
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I believe the short ones are for steel wheels because they are not as thick.
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