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Offset Question

Discussion in 'Handling' started by Punisher, Feb 26, 2005.

  1. Punisher
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    Punisher New Member

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    [Feb 26, 2005]
    I have found a set of alloys that i like but the offset is ET40
    I currently have alloys on with ET35

    Can you tell me if the ET40 rims will stick out further or tuck in under the arches?
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  3. jojo
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    jojo S3 Drift King! Staff Member Moderator

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    [Feb 26, 2005]
    [ QUOTE ]
    I have found a set of alloys that i like but the offset is ET40
    I currently have alloys on with ET35

    Can you tell me if the ET40 rims will stick out further or tuck in under the arches?

    [/ QUOTE ]

    Further in the arches /ubbthreads/images/graemlins/beerchug.gif
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  4. scoTTy
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    scoTTy Active Member

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    [Feb 26, 2005]
    This may help /ubbthreads/images/graemlins/wink.gif
    [​IMG]
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  5. Punisher
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    Punisher New Member

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    [Feb 26, 2005]
    Thanks
    So if if i want to get the correct offset for the new alloys i will need spacers?
    Yes/No
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  6. scoTTy
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    scoTTy Active Member

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    [Feb 26, 2005]
    Yes

    Are they the same width as the OEM ones? If not then to ensure they clear the wheels arches etc you also need to factor this in.
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  7. Punisher
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    Punisher New Member

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    [Feb 26, 2005]
    The ones coming off are 7.5" wide and the new ones are 8" wide
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  8. curtis11
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    curtis11 Member

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    [Feb 26, 2005]
    they might rub on the inside , will probably need a 5 mm spacer to make it like a 35mm offset
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  9. scoTTy
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    scoTTy Active Member

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    [Feb 26, 2005]
    Offsets are in mm and the widths are Inches so to make it easier lets stick to mm.

    The width is 12.5mm wider.(i.e 1/2 inch) which is 6.25mm extra on either side of the central point. The offset is 5mm extra.

    This means that the inner edge of the wheel will be 6.25+5=11.25mm further in and the outsider edge of the wheel will be 6.25-5mm=1.25mm further out.

    (I think I did my sums right!!)

    Whether this works on your car I have no idea. If the forum knew what car you had then someone might be able to advise.

    Don't forget if you go for spacers you'll also need longer wheel bolts and locking bolts.

    Of course there's still no guarantee as it depends on the shpe of the wheel and if the "spokes" come in and hence could hit the caliper.

    If you're also increasing the diameter then you need to ensure you get the correct tyre size to keep the overall radius the same otherwise your speedo etc will be out.
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  10. Punisher
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    Punisher New Member

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    [Feb 26, 2005]
    I have a 99 Golf 1.8T. PCD 5X100
    The wheels i want to get have a PCD 5x120 (ala BMW) and i will get some hub adapters.
    the size is 8.5x19 et 40
    Will i encounter problems do you think? my car has coilovers fitted but not lowered excessively.
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  11. scoTTy
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    scoTTy Active Member

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    [Feb 26, 2005]
    I've never used hub adaptors and therefore can't comment. I guess they will have their own thickness which you need to factor in.

    You've now said they're 8.5J whereas before you said 8. This means you need to add another 6.5mm to the differences. Your inside will therefore be 17.75mm further in.

    I don't know but I'd be quite concerned about the risk of rubbing on the arches particulalry if you've lowered it.

    I know the theory and the maths but I have no experience of your car so I can't advise on it. A specialist Golf forum may be of more help.
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  12. curtis11
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    curtis11 Member

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    [Feb 26, 2005]
    [ QUOTE ]
    I have a 99 Golf 1.8T. PCD 5X100
    The wheels i want to get have a PCD 5x120 (ala BMW) and i will get some hub adapters.
    the size is 8.5x19 et 40
    Will i encounter problems do you think? my car has coilovers fitted but not lowered excessively.

    [/ QUOTE ]

    m8 how could u be arsed with all the hassle just buy rims for ur car
    #11
  13. jojo
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    jojo S3 Drift King! Staff Member Moderator

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    [Feb 26, 2005]
    [ QUOTE ]
    I have a 99 Golf 1.8T. PCD 5X100
    The wheels i want to get have a PCD 5x120 (ala BMW) and i will get some hub adapters.
    the size is 8.5x19 et 40
    Will i encounter problems do you think? my car has coilovers fitted but not lowered excessively.

    [/ QUOTE ]

    I think that hub adaptors will add 10mm, so bringing your wheels to ET 30 off set, I'm running 8.5x19" on my S3 at the mo' with 235/35 tyres all round, you should be able to accomodate 245 tyres for the rear with no arch problems with these offsets, but I suggest you have narrower tyres on the fronts, say 215/35R19 to avoid arch problems on full lock.
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  14. Punisher
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    Punisher New Member

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    [Feb 27, 2005]
    Yeah sorry they are 8.5 wide not 8
    I know it's a lot of hassle just for alloys,
    Do you think i should go for 18's rather than 19's
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  15. scoTTy
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    scoTTy Active Member

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    [Feb 27, 2005]
    It depends what you're after. I'd never go for 19s. Theres a couple of reasons; ride comfort and the risk to the wheel.

    19s have so little rubber around them it can make the ride harsh. Of course this depends on the suspension you have. The 'sportier' the harder the resulting ride. Also the small amount of rubber means you're more likely to damage the wheel on potholes etc.

    In general increasing size also increases weight and this has a negative effect on handling.

    If you're just into poseing then I guess you'll sacrifice all the above. If you're into 'driving' then perhaps you'll downsize.

    Just my opinion /ubbthreads/images/graemlins/wink.gif

    <waiting to be flamed by the big wheel brigade!!>
    #14

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