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Thread: I am puzzled!

  1. #1
    Fellow Frogger!
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    Default I am puzzled!

    In amongst the small mountain of parts which came with the 5 Gordini there are a pair of front uprights with hubs. These are front wheel drive, but here's the query, the stud spacing is not the same as 5/12 etc. It is bigger, more like the stud spacing found on an 8!
    What could they be?

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  2. #2
    COL
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    The stud PCD of the R8/10/12/15/16/17/18 are 3 x 150 mm

    The stud PCD for the R4/5/6 is 3 x 130 mm I think
    Regards Col

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    Thanks Col. I am even more puzzled now, as the 5G uses R12 brakes, and they appear unmodified. The Group 2 uses, of course you guessed it, the 15/17 ones. You are right about the 130mm.
    Perhaps the original rotors were supplied as blanks and drilled to suit the 130mm spacing. Hmmmmm

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    COL
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    Maybe the 5G had the bigger brakes from the R12 and hence the 150mm PCD.

    Will have to wait for Simon to spot this thread and give us the real story.
    Regards Col

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    Quote Originally Posted by kiwia110 View Post
    Perhaps the original rotors were supplied as blanks and drilled to suit the 130mm spacing. Hmmmmm
    The part number in the catalogue for disc brake 5 Mk1s (including the 5A/G) is identical to the Renault 12 non-vented front disc. So no drilling of blanks needed. :-)

    Any chance of a pic of the mystery front hubs? I'd guess the answer would be up in a jiffy!
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    I am puzzled!-p2180234.jpg
    Quote Originally Posted by Simon View Post
    The part number in the catalogue for disc brake 5 Mk1s (including the 5A/G) is identical to the Renault 12 non-vented front disc. So no drilling of blanks needed. :-)

    Any chance of a pic of the mystery front hubs? I'd guess the answer would be up in a jiffy!
    Photo done, as you can see it looks like a wishbone type set up. I don't have a good memory of the 12, but wasn't that a bit different to account for the long spring? The 5G has the smaller stud spacing than a 12.
    Interesting that your listing comes up as that Simon, as when I went to sort pads the "standard" 5 ones were nothing like the ones on the G. It wasn't till we went down the line of looking at 12s, just in case, that we came up with the correct pads. As you say the part number is the same, what would account for the 130mm stud spacing? I am in no way doubting you, just puzzled!
    Last edited by kiwia110; 31st October 2015 at 11:27 AM.

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    Quote Originally Posted by kiwia110 View Post
    I am in no way doubting you, just puzzled!
    I just thought I was very lucky to have been given the Renault 5 Mk1 microfiche (among many others) a few years ago.

    So, I guess it depends on what you are calling the rotor. I call that the disc part, the one that gets stopped by the pads. That is the part specified as being the same as a non-vented Renault 12 brake disc. The part that the disc bolts to, which is splined for the driveshaft, I call the wheel hub, which is bespoke 5A/G (with the 130mm PCD). Even though the wheel bearings are the same dimension as those on the late Renault 12, (35 x 72 x 17), for the 5A/G they have a different unique part number which likely indicates a different material spec.
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    Ok Simon so that we are clear, I normally use the word disc, but was told on this site years ago that they are really called rotors, so you and I would normally call them discs
    The wheel hub we use the same words. On the 5A/G they have a much larger driveshaft diameter and splines size than the garden variety 5 which would explain the different part number?
    What I had totally forgotten is where the disc bolts on. My dumb memory forgot that unlike most cars the wheel studs do not pass through the disc,
    None of the above resolves what the hubs and what I call uprights are from though. Any ideas?

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    Quote Originally Posted by kiwia110 View Post
    Any ideas?
    Oh, Renault 12/15TL, LHS. It needs turning over to tell whether it is early or late.
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    I agree they are disc's. Drum brakes have drums and disc brake have discs. Rotors, where does that come from U.S.A?

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    Quote Originally Posted by Simon View Post
    Oh, Renault 12/15TL, LHS. It needs turning over to tell whether it is early or late.
    Thanks. That turns them into scrap.

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    Quote Originally Posted by Sunroof View Post
    I agree they are disc's. Drum brakes have drums and disc brake have discs. Rotors, where does that come from U.S.A?
    Dunno. I think I first heard them referred to as rotors was the time our Peugeot 306 needed new ones, perhaps 12-15 years ago.
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    If you type "rotors and brakes" into the web it refers you to disc brakes.

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