E30 Zone

Is it possible to fit 7.5x16 ET30 on 318i (drums on rear axle) without any spacers? And if I will fit 225/45R16 on it, will I have any problems with arches?
Cheers,
Jan

That's a good question.
Applies to me also but with rear discs.
Anyone ?

while we're at it, how about 7 x 15 with 205 rubber et 35 (discs all round)? Cheers

Yaninnya wrote:Is it possible to fit 7.5x16 ET30 on 318i (drums on rear axle) without any spacers? And if I will fit 225/45R16 on it, will I have any problems with arches?
Cheers,
Jan

Firstly, for that size rim with that offset of ET30, you would need 5mm spacers for it to sit as it should at ET25. If not they will sit too far to the caliper and reduce handling efficency. This is based on correct tyre size of 205/50/16 tyres.

By having the tyre size 225/45/16 will not only put you speedo out but you may also need an additional 5mm on the spacer.

This is the way i understand it

HTH

Think you might just get away with it as there 7.5J's though not sure on rubber size.. might have to go 205/215's instead to be safe....im near that point myself and im afraid its one of those things you wont know till there on the car as everycar sits differently etc... if you use spacers go for the smallest poss 5mm if you can the you might save yerself the job of arch rolling which then doenst make yer wheel and tyre cost that cheap

bigmattpowell wrote:while we're at it, how about 7 x 15 with 205 rubber et 35 (discs all round)? Cheers

For this set up, the correct offset for the rim is ET26.

If you are putting ET35 7x15 rims with 205/55/15 tyres, 9mm spacers would be required for it to be the correct offset.

HTH

massive wrote:

Yaninnya wrote:Is it possible to fit 7.5x16 ET30 on 318i (drums on rear axle) without any spacers? And if I will fit 225/45R16 on it, will I have any problems with arches?
Cheers,
Jan

Firstly, for that size rim with that offset of ET30, you would need 5mm spacers for it to sit as it should at ET25. If not they will sit too far to the caliper and reduce handling efficency. This is based on correct tyre size of 205/50/60 tyres.

By having the tyre size 225/45/16 will not only put you speedo out but you may also need an additional 5mm on the spacer.

This is the way i understand it

HTH

16 x 7.5j with an offset of 30 is listed to fit depending on rubber size.

the offset of 25 is recommended but not essential on the e30..there is room either way..could get rubbing on full lock for instance,might hit strut if youve got 3 peeps in the back going over bumps...

one of them things you gota try..problem is unless your real freidnly with the tyre supplier how do you know what choice to go for..once there on there on..

i got 8jx17's all round going on mine soon and got no idea on what il need but 5mm spacers looks the way atm if i can get em for the e30

JAMZ wrote:

massive wrote:

Yaninnya wrote:Is it possible to fit 7.5x16 ET30 on 318i (drums on rear axle) without any spacers? And if I will fit 225/45R16 on it, will I have any problems with arches?
Cheers,
Jan

Firstly, for that size rim with that offset of ET30, you would need 5mm spacers for it to sit as it should at ET25. If not they will sit too far to the caliper and reduce handling efficency. This is based on correct tyre size of 205/50/60 tyres.

By having the tyre size 225/45/16 will not only put you speedo out but you may also need an additional 5mm on the spacer.

This is the way i understand it

HTH

16 x 7.5j with an offset of 30 is listed to fit depending on rubber size.

Rubber size 205/50/16

massive wrote:Firstly, for that size rim with that offset of ET30, you would need 5mm spacers for it to sit as it should at ET25. If not they will sit too far to the caliper and reduce handling efficency.

You can't notice that 5 mm difference during even fast road driving .

massive wrote:By having the tyre size 225/45/16 will not only put you speedo out .

Why? 205/50 and 225/45 have the same diameter.

JAMZ wrote:16 x 7.5j with an offset of 30 is listed to fit depending on rubber size. The offset of 25 is recommended but not essential on the e30..there is room either way..could get rubbing on full lock for instance,might hit strut if youve got 3 peeps in the back going over bumps...

Good news! I have standard suspension height (off road style ) and I'm used to driving alone. Also rubbing on full lock is acceptable for me. Cheers!

massive wrote:

JAMZ wrote:16 x 7.5j with an offset of 30 is listed to fit depending on rubber size.

Rubber size 205/50/16

205/50 is too narrow for 7.5' rim. 7' is maximum for 205/50.

You can't notice that 5 mm difference during even fast road driving

Dont understand what this meant however, I didnt say it wouldn't fit, just said for the CORRECT offset you'd need a 5mm spacer. Perhaps 5mm negative offset wont make a noticable difference.

Why? 205/50 and 225/45 have the same diameter.

Errr how did you come to that conclusion

205/50/16.....the middle part is the profile so there is 5mm difference between the two. By having 45 as the profile will make the overall wheel and tyre diameter smaller.....and put your speedo out

205/50 is too narrow for 7.5' rim. 7' is maximum for 205/50.

Strange that, Ive got 205 tyres on my 7.5J x 17


Hope this helps

tyre sizes work like this: the first part is the width in mm, the second part is the height as a percentage of the width, the last part is obviously the wheel size in inches.

therefore a 205/50/16 has a tread height of 102.5mm (50% of 205mm) whereas a 225/45/16 has a tread height of 101.25mm (45% of 225mm)

that's only a 2.5mm difference in diameter...

Guys i saw 8J rims with 205 tyres on when i picked mine up..it goes but i dont like the look of it..

I tried my Keskins on today real quick to see what was going on..there only rims atm no rubber..

8Jx17 et30 and they are close to the struts on the front,didnt try back but i think il have a lil more room on the rears? anyway car was on axle stands so dont know if its gunna make any difference once dropped.

As for the arch.. they are completely level with the arch so i could have problems..but these rims have a polished lip on the facing edge where the tyre sits so there not surposed to go past that...i might get away with it but im only going 215/45/17 tyres or 215/50/17.

massive wrote:

You can't notice that 5 mm difference during even fast road driving

Dont understand what this meant however, I didnt say it wouldn't fit, just said for the CORRECT offset you'd need a 5mm spacer. Perhaps 5mm negative offset wont make a noticable difference.

It means that if the offset is much different it will afect the car handling. 5 mm is marginal.

massive wrote:

Why? 205/50 and 225/45 have the same diameter.

Errr how did you come to that conclusion
205/50/16.....the middle part is the profile so there is 5mm difference between the two. By having 45 as the profile will make the overall wheel and tyre diameter smaller.....and put your speedo out

Absolutely not. Profile on road tyres (in slicks is usualy the overall diameter in size) is in % not mm.

massive wrote:

205/50 is too narrow for 7.5' rim. 7' is maximum for 205/50.

Strange that, Ive got 205 tyres on my 7.5J x 17

And the rim is wider than tyre, isn't it?

i've got 215, stretched on to an 8.5j,

on my 16" x 7.5j rims i rub 205/45 and 225/40, but you can also use 205/50 and 225/45

et30 should not be a problem, bottle caps are et33 or there abouts i belive, and most afetrmarke 17" rims are around et30
so your handling will not suffer any major draw backs

Yaninnya wrote:

massive wrote:

You can't notice that 5 mm difference during even fast road driving

Dont understand what this meant however, I didnt say it wouldn't fit, just said for the CORRECT offset you'd need a 5mm spacer. Perhaps 5mm negative offset wont make a noticable difference.

It means that if the offset is much different it will afect the car handling. 5 mm is marginal.

massive wrote:

Why? 205/50 and 225/45 have the same diameter.

Errr how did you come to that conclusion
205/50/16.....the middle part is the profile so there is 5mm difference between the two. By having 45 as the profile will make the overall wheel and tyre diameter smaller.....and put your speedo out

Absolutely not. Profile on road tyres (in slicks is usualy the overall diameter in size) is in % not mm.

massive wrote:

205/50 is too narrow for 7.5' rim. 7' is maximum for 205/50.

Strange that, Ive got 205 tyres on my 7.5J x 17

And the rim is wider than tyre, isn't it?

Your correct its a %, not mm as the guy above explained. Thats not important....the debate is whether a 205/50 tyre on a rim has a overall larger diameter than a 225/45.

Nope, 205 is the recommended size IIRC

my racing dynamic wheels were ET30 and above 80mph they wobbled like hell.
my hartges are et25 and there are no issues whatsoever
im sorry but im with massive on this one, why would BMW recommend a specific offset? its there for a reason so why abuse it? i reckon the 5mm would make a difference

I've got 205/50/16 on my 7.5Jx16 Hartges

rim is NOT wider than the tyre

using a 'ruler' it looks to me like 8 inches is about 205mm, so 7.5J rim would be narrower than a 205 profile tyre

please correct my maths....

Kos wrote:i've got 215, stretched on to an 8.5j,

on my 16" x 7.5j rims i rub 205/45 and 225/40, but you can also use 205/50 and 225/45

et30 should not be a problem, bottle caps are et33 or there abouts i belive, and most afetrmarke 17" rims are around et30
so your handling will not suffer any major draw backs

Bottle tops would have a different offset they are narrow as fook

as the Massive says, Bottletops are 6J (or at very most 6.5J) IIRC and so have a very different offset

318-is wrote:my racing dynamic wheels were ET30 and above 80mph they wobbled like hell.
my hartges are et25 and there are no issues whatsoever
im sorry but im with massive on this one, why would BMW recommend a specific offset? its there for a reason so why abuse it? i reckon the 5mm would make a difference

That wouldnt cause wobble.. thats yer wheel not on yer Hub correctly or there crap rims... pina reps BK's spring to mind..

If youve got a rim that id TUV approved and has been checked for all sorts of issues not on just wether they look good then you 'shouldnt' get any probs..pay for what you get

PS.. il let yer know for sure on that theory once mine are on..

I am running 7.5J 16" ET35 with 205/50/16 on. To get these on the front you need at least a 5mm spacer to clear the strut. On the back you don't have to worry unless your worried about the slight offset difference. This is something you won't notice driving unless your doing some track / hard driving.

the other point of course is that if the offset is wrong the hub will be subjected to different forces from the original design (i.e. the wheel is further in or out than BMW intended) but you probably will only get through wheel bearings faster, rather than anything serious going wrong....

Still, wheel bearings are cheap yes?

orangecurry wrote:I've got 205/50/16 on my 7.5Jx16 Hartges

rim is NOT wider than the tyre

using a 'ruler' it looks to me like 8 inches is about 205mm, so 7.5J rim would be narrower than a 205 profile tyre

please correct my maths....

Sorry, but it is. The tyre widh is overall so the tread is narrower. Also the widh of rim (in this case 7.5') is measured where tyre is sitting on rim. But you have side edges which are outside of the tyre. On the rims which I want to fit I have 215/40 in the past (Yokohamas - quite wide tyres) and the tyres where exactly as wide as rims. Michelins Pilot SX 205/50 where to narrow.

Yaninnya wrote:

orangecurry wrote:I've got 205/50/16 on my 7.5Jx16 Hartges

rim is NOT wider than the tyre

using a 'ruler' it looks to me like 8 inches is about 205mm, so 7.5J rim would be narrower than a 205 profile tyre

please correct my maths....

Sorry, but it is. The tyre widh is overall so the tread is narrower. Also the widh of rim (in this case 7.5') is measured where tyre is sitting on rim. But you have side edges which are outside of the tyre. On the rims which I want to fit I have 215/40 in the past (Yokohamas - quite wide tyres) and the tyres where exactly as wide as rims. Michelins Pilot SX 205/50 where to narrow.

Must be only in America then cus a number of people have posted saying they run 205 on 7.5J rims....including myself.

massive wrote:Must be only in America then cus a number of people have posted saying they run 205 on 7.5J rims....including myself.

CI means Channel Islands which you shoud know if you are from England. Second - have you any photos of your pictures? show me that...
I'm not saying that it is impossible to fit. It is but looks strange (german style) and affect the handling in comparsion to 225/45.

micktdel wrote:I am running 7.5J 16" ET35 with 205/50/16 on. To get these on the front you need at least a 5mm spacer to clear the strut. On the back you don't have to worry unless your worried about the slight offset difference. This is something you won't notice driving unless your doing some track / hard driving.

Thats the information what I need. Thanks! It means that 7.5x16 ET30 shoud fit without any spacers. What producers are yours tyres?
Jan

Yaninnya wrote:

orangecurry wrote:I've got 205/50/16 on my 7.5Jx16 Hartges

rim is NOT wider than the tyre

using a 'ruler' it looks to me like 8 inches is about 205mm, so 7.5J rim would be narrower than a 205 profile tyre

please correct my maths....

Sorry, but it is. The tyre widh is overall so the tread is narrower. Also the widh of rim (in this case 7.5') is measured where tyre is sitting on rim. But you have side edges which are outside of the tyre. On the rims which I want to fit I have 215/40 in the past (Yokohamas - quite wide tyres) and the tyres where exactly as wide as rims. Michelins Pilot SX 205/50 where to narrow.

well perhaps what we all should be saying is 'the wheels and tyres I have in front of me...'

I swop my 7.5Jx16s 205s every year (I run them as winter wheels), and when I lie them flat on the ground the rims don't touch the ground because the tyre is wider than the rim.

What you get on the 'zone is peoples actual experience, rather than armchair nonsense ; so there are 3 'zoners who actually have 205 tyres - that's all we are trying to say. Not telling you what to buy.

As to 'affecting the handling', as our wheels have the correct offset, if there is a handling issue, you'll be the one who has that, with wider tyres set too far in.

to add to the tyre fitting discussions...

my mate has hartage alloys, fronts are 8.5j and are running 205's, rear alloys are 9.5j and are running 225's



topic here:

Cruise-south-west

orangecurry wrote:

Yaninnya wrote:

orangecurry wrote:I've got 205/50/16 on my 7.5Jx16 Hartges

rim is NOT wider than the tyre

using a 'ruler' it looks to me like 8 inches is about 205mm, so 7.5J rim would be narrower than a 205 profile tyre

please correct my maths....

Sorry, but it is. The tyre widh is overall so the tread is narrower. Also the widh of rim (in this case 7.5') is measured where tyre is sitting on rim. But you have side edges which are outside of the tyre. On the rims which I want to fit I have 215/40 in the past (Yokohamas - quite wide tyres) and the tyres where exactly as wide as rims. Michelins Pilot SX 205/50 where to narrow.

well perhaps what we all should be saying is 'the wheels and tyres I have in front of me...'

I swop my 7.5Jx16s 205s every year (I run them as winter wheels), and when I lie them flat on the ground the rims don't touch the ground because the tyre is wider than the rim.

What you get on the 'zone is peoples actual experience, rather than armchair nonsense ; so there are 3 'zoners who actually have 205 tyres - that's all we are trying to say. Not telling you what to buy.

As to 'affecting the handling', as our wheels have the correct offset, if there is a handling issue, you'll be the one who has that, with wider tyres set too far in.

Well said

tregzybmw wrote:to add to the tyre fitting discussions...

my mate has hartage alloys, fronts are 8.5j and are running 205's, rear alloys are 9.5j and are running 225's



topic here:

Cruise-south-west

What's the ET's?

tregzybmw wrote:to add to the tyre fitting discussions...

my mate has hartage alloys, fronts are 8.5j and are running 205's, rear alloys are 9.5j and are running 225's



topic here:

Cruise-south-west

That is silly stretched.....bet you dont let your misses drive that sucka

feck!

do you have to re-inflate those every morning??!!

there my mates...he gets along with them fine!

the et is 30, but its on a e36. so rather irrelvent in terms of fitting the car...

orangecurry wrote: well perhaps what we all should be saying is 'the wheels and tyres I have in front of me...'
I swop my 7.5Jx16s 205s every year (I run them as winter wheels), and when I lie them flat on the ground the rims don't touch the ground because the tyre is wider than the rim.

You still do not understand me. The rim is not touching the ground. But what about the tread? Is it touching the ground as well? I dont think so. Also for 90% your tyres have RPB (Rim Protection Bar).
Second thing is that tyres from different manufacturers have different width in the same dimension. I.e. Yokohama will be even 40 mm wider (on thread) than Uniroyal.

i run 215/40 on a 9 inch rim and the wheels r definately wider than the tyres!!!

I recently bought some 15*7s et 35 (after i was told they came off an e30 no probs) and they definately did not fit! Didn't clear the struts at the front. Could have bought spacers but as the centre hole was too big any way it would have to be expensive hub centric spacers especially for the e30. At £75 a pop for my £20 wheels I think I'll sell them on to a lucky vauxhall owner and put some decent rims on my credit card.