hop2manual42
Guest
Yea BMW is 5x120... you could try hub adaptors but be careful with the offset, you'll need around an ET35-40. So if the wheels are off a 5 or 7 seiries they won't fit. Most 3 series fitments would be about an ET40.
Gr4eme
Guest
Mercs are 5x112 you'd need hub adapters again... I think the offset on those would be about right... normally a 32-35 I think :S the Mk1v should be ok on 18's the guys back at work would know a bit more than me though.
^^ Erm... What Mk4 CupraR?
PCD
Just Remember The PCD (Pitch Circle Diameter) is the arrangement of the studs/bolt pattern on the hub:
So as said you'll need 5(studs) x 100mm diameter (how far the studs are from the centre of the hub)
If the wheel has a different PCD you can buy an adapter kit (which will also act as a spacer)
Offset (ET)
Now the Offset for the standard wheels are ET37 IIRC?? but it's usually acceptable to got 5-7mm either way of this (depending on width)
If you Reduce the Offset (Say ET37-ET30) you are moving the wheel 7mm further towards the wheel arch of the car and can get rubbing etc
Conversely if you go (Say ET37 - ET40) then you are moving the wheel 3mm further into the wheel arch and can risk fouling the suspension strut/brake caliper (to counter this you can use spacers)
If you get wider wheels, ie moving from a 7J to 8J (7" - J is a denomination of the Wheel profile and determines what type of tyre it can take) you may need to alter the offset to move it further out/in from the hub depending if it's a deep dish (and may foul the arch) or not so deep and foul the strut... but that depends
Spigot diameter
Another thing to consider is the spigot diameter - if the spigot size is larger than your current spigot size then you will need a spigot ring tio stop all the stress being placed on your wheel studs (which can shear if this is the case!)
PCD
Just Remember The PCD (Pitch Circle Diameter) is the arrangement of the studs/bolt pattern on the hub:
So as said you'll need 5(studs) x 100mm diameter (how far the studs are from the centre of the hub)
If the wheel has a different PCD you can buy an adapter kit (which will also act as a spacer)
Offset (ET)
Now the Offset for the standard wheels are ET37 IIRC?? but it's usually acceptable to got 5-7mm either way of this (depending on width)
If you Reduce the Offset (Say ET37-ET30) you are moving the wheel 7mm further towards the wheel arch of the car and can get rubbing etc
Conversely if you go (Say ET37 - ET40) then you are moving the wheel 3mm further into the wheel arch and can risk fouling the suspension strut/brake caliper (to counter this you can use spacers)
If you get wider wheels, ie moving from a 7J to 8J (7" - J is a denomination of the Wheel profile and determines what type of tyre it can take) you may need to alter the offset to move it further out/in from the hub depending if it's a deep dish (and may foul the arch) or not so deep and foul the strut... but that depends
Spigot diameter
Another thing to consider is the spigot diameter - if the spigot size is larger than your current spigot size then you will need a spigot ring tio stop all the stress being placed on your wheel studs (which can shear if this is the case!)
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Gr4eme
Guest
what kind a money is it for wheel adapters and where would u get them or are u better goin 4 a smaller size with the right size hub bolts.
I'm not sure on the pricing but maybe £150 for a kit? I'd try to stick with the right PCD if you can! The only reason to really use adaptors is if your dream wheel isnt made in the right PCD imo
Gr4eme
Guest
What BMW wheels were they out of interest?
You can get hubcentric adapters off EBay for about £150 as mentioned...
You can get hubcentric adapters off EBay for about £150 as mentioned...
Gr4eme
Guest
they were m3 wheels ma pal was selln me them 4 cheap cheap so a wanted some advice b4 i bought them lol.
205/50 r15 86v
EDIT
Ah, I now see the point of the magic calculator thing. It seems like my new alloys should fit easy!
EDIT
Ah, I now see the point of the magic calculator thing. It seems like my new alloys should fit easy!
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What you've quoted hasn't got anything to do with the wheel (dirtectly anyway) it's the specification for the tyre:
205 - Width of tyre in mm
50 - Tyre profile (aspect ratio of tyre width to tyre wall height)
R - Radial type construction
86 - This has something to do with loading I think
V - This is the speed rating (V= up to 149mph)
205 - Width of tyre in mm
50 - Tyre profile (aspect ratio of tyre width to tyre wall height)
R - Radial type construction
86 - This has something to do with loading I think
V - This is the speed rating (V= up to 149mph)
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