Offset values - what are the consequences for transgressors?

TNAWAYAJ · 20th April 2007, 15:27

Hi all,
Am planning to upgrade my Swift stock steel rims to alloys. As I understand, the stock rims have a ET offset of 42mm (please correct me if I am wrong). Does this mean that the new alloys also need to have exactly the same offset? Is there any tolerance limit?

Epic · 21st April 2007, 10:28

Quote:

Originally Posted by TNAWAYAJ

Hi all,
Am planning to upgrade my Swift stock steel rims to alloys. As I understand, the stock rims have a ET offset of 42mm (please correct me if I am wrong). Does this mean that the new alloys also need to have exactly the same offset? Is there any tolerance limit?

Hi TNA,

I believe there are 02 points one has to look at while upgrading your rims; PCD (Pitch Circle Diameter) and Offset. Get one of these things wrong and you are gonna have major problems with the suspension and handling. For the Swift the PCD is 100 and the Offset as you said is 42mm.

However, i have upgraded my stock rims on my Swift Vxi from 5.5 X 14" to 6.5 X 15". I purchased my rims from abroad from OZ Racing. I never knew the value of the the offset required so i had no choice but to ask them. They told me that for the Swift, it should be preferably greater than 42. So i am presently using OZ Racing rims of specification 6.5 X 15", PCD 100 & Offset 43. Its been almost 3 months now and im having no trouble at all what so ever. The car is handling brilliantly!! Im using Goodyear Eagle F1 tryes of size 195/60/R15

All said and done if you are purchasing your wheels from here, make sure you get the above specifications right or you will be in serious trouble. This is the main reason as to why i purchased my wheels from abroad coz the guys here had no clue about what offset is.

Hope the above helps

Epic

cheap_deal · 2nd June 2007, 14:13

here is an offset calculator
Wheel Offset Calculator

i am still a bit confused about offsets, yes i read the tyrebible page and more.
can someone confirm the offsets do not have to be changed when upsizing the tyre?
ive seen many bhpians go from 175/80R13 to 205/50/R15 on lancers. the offset of the lancer is +40mm (am i right?) so the new wheel should have the same offset?
is it better for the tire to extend out more or go into the wheel well? (for performance NOT looks)

evolve · 20th June 2007, 20:10

wheel offsets determine how FAR the face of the wheel will be from the hub face. If you want to give your car a wider track (make the wheels look wide) you will go for a larger offset.

HOWEVER - caution is required. You can usually play with about +-5 offset before your suspension links become stressed.

Upsizing a wheel has nothing to do with offsets. Maintaining the CORRECT offset of a wheel is always recommended. The other way of getting a wider track is by the use of spacers whih 'push' wheels out wider closer to the body edge.

iraghava · 20th June 2007, 20:53

Quote:

Originally Posted by evolve

The other way of getting a wider track is by the use of spacers whih 'push' wheels out wider closer to the body edge.

But even with correct spacers won't there be undue stress on the suspension/steering components considering that you are tampering the Suspension/Steering geometry? Especially given our poor road conditions?

v1p3r · 20th June 2007, 20:59

Yes, there will be...

evolve · 24th June 2007, 17:38

yes there will be stress for sure...... however, most cars nowadays have a built in tolerance of about 5-10mm on each wheel built in to cater for 'mods'. It is not recommended to put spacers anyway........ better to place the correct wheels with the right offsets that give you the look you want without messing with the functionality of the suspension and wheel setup.

iraghava · 25th June 2007, 00:42

Yes, but the point is it will work OK on roads abroad where the conditions are good but in our terrible conditions I suspect there'll be a increased rate of suspension/steering components failure.

v1p3r · 25th June 2007, 02:46

Also, when you say cars built nowadays, our car scene is some years behind yours.

naveenk25 · 9th October 2007, 10:49

Does anyone know the offset for Hyundai Verna. I have an ABS model and hence the stock tyres given with the car is 185, 65 - R14.

I want to change my steel rims to League alloy wheels. Hence I need to know the offset.

Pls help with the offset info.

By the way how does one find this info. definitely does not seem to be in the owners manual.

20th April 2007, 15:27	#1
TNAWAYAJ BHPian Join Date: Apr 2007 Location: Bangalore Posts: 81 Thanked: 126 Times	Offset values - what are the consequences for transgressors? Hi all, Am planning to upgrade my Swift stock steel rims to alloys. As I understand, the stock rims have a ET offset of 42mm (please correct me if I am wrong). Does this mean that the new alloys also need to have exactly the same offset? Is there any tolerance limit?
	() Thanks

2nd June 2007, 14:13	#3
cheap_deal BHPian Join Date: Feb 2006 Location: unknown Posts: 465 Thanked: 8 Times	here is an offset calculator Wheel Offset Calculator i am still a bit confused about offsets, yes i read the tyrebible page and more. can someone confirm the offsets do not have to be changed when upsizing the tyre? ive seen many bhpians go from 175/80R13 to 205/50/R15 on lancers. the offset of the lancer is +40mm (am i right?) so the new wheel should have the same offset? is it better for the tire to extend out more or go into the wheel well? (for performance NOT looks)
	() Thanks

20th June 2007, 20:10	#4
evolve Newbie Join Date: Jun 2007 Location: Dubai Posts: 15 Thanked: 0 Times	wheel offsets determine how FAR the face of the wheel will be from the hub face. If you want to give your car a wider track (make the wheels look wide) you will go for a larger offset. HOWEVER - caution is required. You can usually play with about +-5 offset before your suspension links become stressed. Upsizing a wheel has nothing to do with offsets. Maintaining the CORRECT offset of a wheel is always recommended. The other way of getting a wider track is by the use of spacers whih 'push' wheels out wider closer to the body edge.
	() Thanks

20th June 2007, 20:59	#6
v1p3r Senior - BHPian Join Date: Feb 2005 Location: BLR / DXB / LON Posts: 5,334 Thanked: 6,896 Times View My Garage	Yes, there will be...
	() Thanks

24th June 2007, 17:38	#7
evolve Newbie Join Date: Jun 2007 Location: Dubai Posts: 15 Thanked: 0 Times	yes there will be stress for sure...... however, most cars nowadays have a built in tolerance of about 5-10mm on each wheel built in to cater for 'mods'. It is not recommended to put spacers anyway........ better to place the correct wheels with the right offsets that give you the look you want without messing with the functionality of the suspension and wheel setup.
	() Thanks

25th June 2007, 00:42	#8
iraghava Senior - BHPian Join Date: Oct 2005 Location: Bhaiyyaland Posts: 8,033 Thanked: 265 Times View My Garage	Yes, but the point is it will work OK on roads abroad where the conditions are good but in our terrible conditions I suspect there'll be a increased rate of suspension/steering components failure.
	() Thanks

25th June 2007, 02:46	#9
v1p3r Senior - BHPian Join Date: Feb 2005 Location: BLR / DXB / LON Posts: 5,334 Thanked: 6,896 Times View My Garage	Also, when you say cars built nowadays, our car scene is some years behind yours.
	() Thanks

9th October 2007, 10:49	#10
naveenk25 Newbie Join Date: Sep 2006 Location: Bangalore Posts: 15 Thanked: Once	Does anyone know the offset for Hyundai Verna. I have an ABS model and hence the stock tyres given with the car is 185, 65 - R14. I want to change my steel rims to League alloy wheels. Hence I need to know the offset. Pls help with the offset info. By the way how does one find this info. definitely does not seem to be in the owners manual.
	() Thanks

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