Offset 101 For Dummies - Page 2 - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

sultan · 12-02-2007, 10:27 AM

Quote:

Originally Posted by Doluck

If your in the wheel business then it is 10" you dont messure a wheel from end to end, you mesure from the seat to seat.
We always use mm... cus engineers and designers never us anything US.. hehe ... only the metric system. This way its the same world wide.

... these are some nice pics you guys are coming up with....
I will use the hell out of these for trainging..

but the point is when you are figuring out offset you do NOT use seat to seat width, you use overall width. if people tried to figure out the offset of their wheels using what people said earlier in the thread it would be wrong. when a wheel size is not marked most sellers of wheels in the US and some in japan (upgarage) do not correctly measure the wheels and you end up with a different offset and width.

and they were talking about converting to mm which is 100% pointless except for offset, not actually measuring in mm. this thread is not about engineers and their fancy metric measuring tools, it's about retarded people on zilvia trying to figure out what size their wheels are.

Steveohoes · 12-02-2007, 11:04 AM

Great write up!

Definitely needs to be stickied

Doluck · 12-02-2007, 11:21 AM

This is true, I always just add 12mm to the side im trying to get a tight fitment on. I t would be nice if the width was taken from lip to lip tho.... If someone need to get detailed you would need to messure the wheel by hand.

*babowc* · 12-02-2007, 04:52 PM

Quote:

Originally Posted by Doluck

If your in the wheel business then it is 10" you dont messure a wheel from end to end, you mesure from the seat to seat.
We always use mm... cus engineers and designers never us anything US.. hehe ... only the metric system. This way its the same world wide.

... these are some nice pics you guys are coming up with....
I will use the hell out of these for trainging..

That is completely irrelevant to this topic.
OP isnt in the wheel business.
You'll HAVE to measure the physical dimensions from lip to lip because ultimately, the seat width doesnt matter for shit when you're fitting the wheels on the car.

koukimonster139 · 12-02-2007, 04:58 PM

Doluck, you're a jackass

we're not talking about how to measure a wheel

we're talking about how to measure the offset of a wheel which is not obtained using the seat width.

Doluck · 12-02-2007, 05:58 PM

Wow ... you guys are tards.... If you read the whole post you woudl see the relevants.

If you have a 10" wide wheel(254mm) with +35mm offset.(254/2+35=162)(254-162=92) so you cant go thinking that you have 162mm / 92mm, cuz when we tell you specs on a wheel its width is from seat to seat. That 10" wide wheel is really 10.8" or so. You back space is really about 102mm not that 92 you would get from that wheels specs. get it... it was just an fyi. So chill out...

*babowc* · 12-02-2007, 06:09 PM

hence our response:
10" wheel is not physically 10", rather nearly 11".

you just reiterated what we said.

Doluck · 12-02-2007, 06:17 PM

But the offset is that of a 10" wheel. which means you need to add a few mm to you math if you are doing the math for a perfect fit.

*rongfk* · 12-02-2007, 06:18 PM

how can you tell the offset from looking at the back of the wheel? what letters are typically used to determin it.

koukimonster139 · 12-02-2007, 06:19 PM

if the wheels are worth a flying fuck there will be a stamping or a sticker showing the size, width, manufacturer, offset, model number etc...

Doluck · 12-02-2007, 06:22 PM

No its not right... thats what im trying to tell you. if the maker says its a 10" wheel its not, and they say the offset is +35 well its not. Cuz the wheel is really 10.8" and the offset (from lip to lip) would change. The offset # we give is off the width from seat to seat.

*babowc* · 12-02-2007, 06:36 PM

Quote:

Originally Posted by Doluck

No its not right... thats what im trying to tell you. if the maker says its a 10" wheel its not, and they say the offset is +35 well its not. Cuz the wheel is really 10.8" and the offset (from lip to lip) would change. The offset # we give is off the width from seat to seat.

posted that earlier.
you must've missed it.

but i see what you're saying.

sultan · 12-02-2007, 06:40 PM

Quote:

Originally Posted by koukimonster139

if the wheels are worth a flying fuck there will be a stamping or a sticker showing the size, width, manufacturer, offset, model number etc...

my work vs-ss and work emitz have the sizes stamped on them, the ssr d5r's have a sticker.
my amistad type d, no sticker or marking. my old weds kranze cerberus, no sticker or marking. i guess they are not worth a flying fuck then.

Quote:

Originally Posted by Doluck

No its not right... thats what im trying to tell you. if the maker says its a 10" wheel its not, and they say the offset is +35 well its not. Cuz the wheel is really 10.8" and the offset (from lip to lip) would change. The offset # we give is off the width from seat to seat.

that is completely wrong. backspace - centerline (based on overall width of course) = offset. i've measured wheels with marked sizes (rota grid off road, work emitz) and my measurements match what is on the wheel. rota said +10, it was +10, work said +0 and -16, it was +0 and -16.

koukimonster139 · 12-02-2007, 06:43 PM

^ thats wierd

my weds kranze cerberus have stickers

guess yours fell off

Doluck · 12-02-2007, 06:52 PM

I do know Rota do give you the total width.. I found that out when I worked with them awhile ago. Thats why they are one of the brands I carry.
My works, volks,enkei and 99% of the other wheels I have sold have never added up. Rota does it to cut down on weight.

usdm180sx · 12-02-2007, 07:30 PM

Wow. You should read the "for all you rota haters" thread haha

Doluck · 12-02-2007, 09:55 PM

I did... I know 240 guys dont like them... I love them, but that cuz I can sell the hell out of them to honda guys..

*rongfk* · 12-02-2007, 11:03 PM

where do i look?

xamraci · 12-02-2007, 11:51 PM

Quote:

Originally Posted by rongfk

where do i look?

I would IMAGINE the k-50

My Konig Rewinds had the -9 on the inside in a similar area, my Volks had them on the back also(+42)...So do my BBSs(+0, +19)...thats the only number I could see being it...what is the style of the wheel?

*rongfk* · 12-02-2007, 11:55 PM

they're enkei sporsh

hellion240sx · 12-03-2007, 12:16 AM

like the pic in post 26! def helps to understand. might show this to a few ppl.

*rongfk* · 12-04-2007, 06:15 PM

Quote:

Originally Posted by rongfk

where do i look?

any advice? it appears to have a positive offset, but of what? is the question.

flclsteve · 12-05-2007, 08:06 PM

So noobie question
What are the pros n cons of having plus or minus offset is it just for looks
or do certian wheels have certian offsets to fit correctly

*HaLo* · 12-05-2007, 08:11 PM

Making this a sticky

Keep it clean.

To insulting users, consider being warned.

firelizard · 12-05-2007, 09:56 PM

Quote:

Originally Posted by flclsteve

So noobie question
What are the pros n cons of having plus or minus offset is it just for looks
or do certian wheels have certian offsets to fit correctly

In a nutshell:

Quote:

Originally Posted by Miata.net

Often a driver will select a wheel with a smaller offset than stock.

A smaller offset will create a scrub radius which may affect the handling of the car, but there are a number of reasons why you may need to choose a smaller offset.

1. To compensate for a wider wheel: A wider wheel with the exact same scrub radius as the stock wheel will be positioned closer to the suspension components. If the wheel is too much wider, it will not fit. To compensate, you would choose a smaller offset to move the wheel away from the suspension.

2. To create a wider stance: By setting the wheels outward, the stance of the car becomes wider and stability is increased. In some applications, the benefits of this stability are greater than the drawbacks of the scrub radius change and the driver may make this compromise.

3. Looks: A smaller offset moves the wheels outward, so they have a tendency to fill out the wheel well better. Cars set up for show, more than performance will often choose a lower offset wheel, however, if the offset is too small the sidewall will rub the inside of the fender.

And as for what "scrub radius" is:

Quote:

Scrub radius is the distance from the point where the steering axis meets the ground, to the center of the contact patch of the tire. Zero scrub radius is desirable. Increasing the scrub radius will result in more kickback through the steering wheel when you hit bumps and increased steering effort.

Also, lower offset = harder on wheel bearings, so that's something to account for.

GabeS14 · 12-05-2007, 10:28 PM

Quote:

Originally Posted by rongfk

any advice? it appears to have a positive offset, but of what? is the question.

Is there any other stickers on it?
usually there is a sticker with the size, and next to a a positive or negative number followed by a number(*in smaller letters)
if not then you would need to get it measured,
or check the manufacturers website to see the different offsets they offer and try to guestimate which one you have!

SSMini · 12-14-2007, 01:57 PM

Hope you guys dont mind me asking a question here rather then starting a new post. I picked up a set of wheels and some coilovers, there not installed yet. I still have to convert to 5 lug. My question is, would I need front spacers if running a 18x8.5 with a +30 off set when using coilovers? If it matters, Im going to be using Rays Gramlights 57F's with Tein Flex coilovers. Rear wheels will be 18x9.5 +20 off set.Thanks...

*Yuri* · 12-14-2007, 02:06 PM

Quote:

Originally Posted by rongfk

where do i look?

16x7 +50
Most oem wheels are stamped like this.
The offset will be a random spot on either the back of the face, or the front near the bolt holes.

*MrChow* · 12-15-2007, 03:32 PM

There... Look. 16x7 +51
There all normally posted somewhere just like Yuri said.

Vernal · 12-29-2007, 12:04 AM

dam +51. Teardrops are less than that.

12-02-2007, 04:58 PM	#35
koukimonster139 Zilvia FREAK! Join Date: Jan 2006 Location: Birmingham, AL Age: 23 Posts: 1,361 Trader Rating: (0)	Doluck, you're a jackass we're not talking about how to measure a wheel we're talking about how to measure the offset of a wheel which is not obtained using the seat width. __________________ ho ha ho chi chi

12-02-2007, 06:18 PM	#39
rongfk family man= off and on builder Join Date: Dec 2006 Location: sur, califa's Posts: 505 Trader Rating: (4) Rides Gallery: rongfk	how can you tell the offset from looking at the back of the wheel? what letters are typically used to determin it. __________________ for sale: http://www.zilvia.net/f/showthread.php?t=193169 Luv 2 Build, Luv 2 Show, Luv 2 Cruise!....

12-02-2007, 06:19 PM	#40
koukimonster139 Zilvia FREAK! Join Date: Jan 2006 Location: Birmingham, AL Age: 23 Posts: 1,361 Trader Rating: (0)	if the wheels are worth a flying fuck there will be a stamping or a sticker showing the size, width, manufacturer, offset, model number etc... __________________ ho ha ho chi chi

12-02-2007, 06:43 PM	#44
koukimonster139 Zilvia FREAK! Join Date: Jan 2006 Location: Birmingham, AL Age: 23 Posts: 1,361 Trader Rating: (0)	^ thats wierd my weds kranze cerberus have stickers guess yours fell off __________________ ho ha ho chi chi

12-02-2007, 07:30 PM	#46
usdm180sx Post Whore! Join Date: Dec 2005 Location: 562 Posts: 3,714 Trader Rating: (3) Rides Gallery: usdm180sx	Wow. You should read the "for all you rota haters" thread haha __________________ -Norm! http://i97.photobucket.com/albums/l2.../koukisig2.jpg

12-02-2007, 11:04 AM	#32
Steveohoes Leaky Injector Join Date: Mar 2007 Location: Springfield Posts: 143 Trader Rating: (1)	Great write up! Definitely needs to be stickied

12-02-2007, 11:21 AM	#33
Doluck Zilvia Member Join Date: Nov 2005 Location: Jacksonville, Fl. Age: 29 Posts: 182 Trader Rating: (0)	This is true, I always just add 12mm to the side im trying to get a tight fitment on. I t would be nice if the width was taken from lip to lip tho.... If someone need to get detailed you would need to messure the wheel by hand.

12-02-2007, 05:58 PM	#36
Doluck Zilvia Member Join Date: Nov 2005 Location: Jacksonville, Fl. Age: 29 Posts: 182 Trader Rating: (0)	Wow ... you guys are tards.... If you read the whole post you woudl see the relevants. If you have a 10" wide wheel(254mm) with +35mm offset.(254/2+35=162)(254-162=92) so you cant go thinking that you have 162mm / 92mm, cuz when we tell you specs on a wheel its width is from seat to seat. That 10" wide wheel is really 10.8" or so. You back space is really about 102mm not that 92 you would get from that wheels specs. get it... it was just an fyi. So chill out...

12-02-2007, 06:09 PM	#37
babowc Premium Member Join Date: Nov 2005 Location: G.NET Posts: 1,806 Trader Rating: (1)	hence our response: 10" wheel is not physically 10", rather nearly 11". you just reiterated what we said.

12-02-2007, 06:17 PM	#38
Doluck Zilvia Member Join Date: Nov 2005 Location: Jacksonville, Fl. Age: 29 Posts: 182 Trader Rating: (0)	But the offset is that of a 10" wheel. which means you need to add a few mm to you math if you are doing the math for a perfect fit.

12-02-2007, 06:22 PM	#41
Doluck Zilvia Member Join Date: Nov 2005 Location: Jacksonville, Fl. Age: 29 Posts: 182 Trader Rating: (0)	No its not right... thats what im trying to tell you. if the maker says its a 10" wheel its not, and they say the offset is +35 well its not. Cuz the wheel is really 10.8" and the offset (from lip to lip) would change. The offset # we give is off the width from seat to seat.

12-02-2007, 06:52 PM	#45
Doluck Zilvia Member Join Date: Nov 2005 Location: Jacksonville, Fl. Age: 29 Posts: 182 Trader Rating: (0)	I do know Rota do give you the total width.. I found that out when I worked with them awhile ago. Thats why they are one of the brands I carry. My works, volks,enkei and 99% of the other wheels I have sold have never added up. Rota does it to cut down on weight.

12-02-2007, 09:55 PM	#47
Doluck Zilvia Member Join Date: Nov 2005 Location: Jacksonville, Fl. Age: 29 Posts: 182 Trader Rating: (0)	I did... I know 240 guys dont like them... I love them, but that cuz I can sell the hell out of them to honda guys..

12-02-2007, 11:03 PM	#48
rongfk family man= off and on builder Join Date: Dec 2006 Location: sur, califa's Posts: 505 Trader Rating: (4) Rides Gallery: rongfk	where do i look? __________________ for sale: http://www.zilvia.net/f/showthread.php?t=193169 Luv 2 Build, Luv 2 Show, Luv 2 Cruise!....

12-02-2007, 11:55 PM	#50
rongfk family man= off and on builder Join Date: Dec 2006 Location: sur, califa's Posts: 505 Trader Rating: (4) Rides Gallery: rongfk	they're enkei sporsh __________________ for sale: http://www.zilvia.net/f/showthread.php?t=193169 Luv 2 Build, Luv 2 Show, Luv 2 Cruise!....

Sponsored Links

12-03-2007, 12:16 AM	#51
hellion240sx Zilvia Addict Join Date: Nov 2003 Location: NOLA Age: 28 Posts: 749 Trader Rating: (0)	like the pic in post 26! def helps to understand. might show this to a few ppl.

12-05-2007, 08:06 PM	#53
flclsteve Zilvia Junkie Join Date: Aug 2007 Location: Irvine Age: 20 Posts: 539 Trader Rating: (2)	So noobie question What are the pros n cons of having plus or minus offset is it just for looks or do certian wheels have certian offsets to fit correctly __________________ http://img124.imageshack.us/img124/9701/img8169ug8.jpg

12-05-2007, 08:11 PM	#54
HaLo from Canada, eh! Join Date: Sep 2001 Location: Montreal, Quebec Age: 31 Posts: 5,231 Trader Rating: (0) Rides Gallery: HaLo	Making this a sticky Keep it clean. To insulting users, consider being warned. __________________ -> HaLo All-around fun car: 01 GPW Honda S2000 -> stock Daily Driver: 2006 Dark Blue Civic DX-G w/Nothing PARTED: 93 Pearl White 240SX LE Fastback w/SR20DET SOLD: 93 Super White 240SX SE Convertible w/Silvia Front

12-14-2007, 01:57 PM	#57
SSMini Leaky Injector Join Date: Jul 2007 Location: The Hurricane State.. Posts: 74 Trader Rating: (0)	Wheel fitment with coilovers.... Hope you guys dont mind me asking a question here rather then starting a new post. I picked up a set of wheels and some coilovers, there not installed yet. I still have to convert to 5 lug. My question is, would I need front spacers if running a 18x8.5 with a +30 off set when using coilovers? If it matters, Im going to be using Rays Gramlights 57F's with Tein Flex coilovers. Rear wheels will be 18x9.5 +20 off set.Thanks...

12-29-2007, 12:04 AM	#60
Vernal Zilvia Junkie Join Date: Aug 2006 Location: Burbank, CA Posts: 365 Trader Rating: (0)	dam +51. Teardrops are less than that.

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