Offset vs Backspacing conversion chart and other wheel measurement info

[JDriver1.8t]

you wouldn't stretch on that size wheel. There isn't any point, and there are only draw backs, no benefit. You would run a 225/40/18.

if you have to be part of the "in" crowd and run the wrong tires, you can look for a 215/40/18 or a 205/40/18, but make sure they have the proper load rating for your car.

[tucktuck]

i have a golf III gl and i am wanting to mount a set of 15" or 16" x8" on it. More than likely 15"s. i want a decent lip with that stretched tire look. now, the wheels im considering have a 0- offset. what should i be looking for in terms of offset and/or spacers in order to get an 8in wide wheel (or a 0 offset wheel for that matter)to fit properly? i've search around and have yet to make heads or tails of the matter. thank you in advance.

[JDriver1.8t]

i know I have seen and answer to this question in the last two months, but I dont remember the answer.

I know you can fit a 8'' wide wheel with a et0, but it is going to poke some. I think people are running a 195 tire on them.

[CamaroSS]

I have a set of ADR Cyphers that are 18x7.5 with a 48mm offset. will these fit nicely on a mk iv gti? What size spacers should i run to make these wheels sit flush with the flares?

[pushedpast]

so i've been having some horrible luck recently and thought it was over until my power steering went this afternoon. I recently replaced the stock 17x7 225/45/r17 wheels on my 04 GTI with a set of 17x9 245/45r17 Rota Torques. I have had no clearance issues and thus thought i was fine, but my VW parts guy has said that it's possible that the offset of the wider wheels caused the tie rod to pull the seal out of the steering rack. what i'm wondering is if this has happened to anyone else, and whether i should just sell these wheels and look for something closer to stock, or run the risk destroying yet another steering rack

[rabbitGTI-1983-]

hey i jus got a set of 16 inch beetle wheels.. i plan on gettin them widend this winter i was wonder wat size tire i should run on them for little stretch in rear... i gana have the lip of rim flush with fender maybe alittle poke...i was thinkin 8 up front an 9 in rear.. thanks in advance

[Rays_2001gti]

i just picked up some 18x8.5 front an 18x9.5 rear offset 44 oh an they are 5x112 will i have problems fitting them on the front? planning 205 40 front 215 40 rear? or what do you think? they told me to run 18mm adapter that its the smallest they make.
thanx

[JDriver1.8t]

should fit ok.

[vortexnewbie]

can a 2000 mk4 1.8t jetta clear 245/40/17 for rear tires?

[SlowJetta2.5]

I have a 2009 MK5 Jetta S and I'm looking to buy 17x7.5 BBS CV wheels with et37 offset. They currently are fitted with 235/45-17s. I'm aware that the wheels will be shifted about an inch outward from where they're at. Would you foresee any rubbing with these? I've heard somewhere that with 8" wide wheels or narrower, et35 or greater is fairly safe in terms of fender rubbing.

Any insight is appreciated.

Also, is center bore diameter a worry here? They were originally fitted to a B7 A4.

Thanks

[xxswat718xx]

I have an mkiv jetta and just came into some wheels I'd like to put on. The specs are:

18x8
5x100
+48mm offset

Will i have to run spacers? If so, what size?
What length lug bolts will i need?

Thanks

[JDriver1.8t]

^^^Will fit fine in the rears. Could fit in the fronts as well depending on offset.

^^Shouldn't be a problem, but may rub a little at full lock or under heavy cornering.

^You will need at least 10mm spacers. 15-20mm spacers would be ideal.
Stock bolts are 28mm, then you add spacer width, or order the sets of spacers w/ bolts from reputable online retailers.

[pnyknights]

^^^Will fit fine in the rears. Could fit in the fronts as well depending on offset.

^^Shouldn't be a problem, but may rub a little at full lock or under heavy cornering.

^You will need at least 10mm spacers. 15-20mm spacers would be ideal.
Stock bolts are 28mm, then you add spacer width, or order the sets of spacers w/ bolts from reputable online retailers.

Good to see you're back and made it through the 'switch'. Hows the new house? Still 'tethering'? :p

[xxswat718xx]

^You will need at least 10mm spacers. 15-20mm spacers would be ideal.
Stock bolts are 28mm, then you add spacer width, or order the sets of spacers w/ bolts from reputable online retailers.

Hey. I can't thank you enough for the reply. I was going nuts here and not getting answers from any other forums.

According to your answer, I think i was on somewhat the right track. Last week I ordered longer lug bolts, assuming i would need spacers. I ordered conical 45mm lug bolts.


If i go ahead and order 15mm spacers, I'd need 43mm bolts. 17.5mm spacers would require 45.5mm bolts. Being that they're conical, does that add more length? Which of the two spacer sizes would you recommend I go with?

Thanks bud

[JDriver1.8t]

Good to see you're back and made it through the 'switch'. Hows the new house? Still 'tethering'? :p

I just got Clear Wireless Internet for the home. Its working well so far. I'm mostly moved in now.
Now it is just putting everything away and organizing everything again.

Here is the new place:

(bagged, big turbo'd, mostly shaved, huge stereo'd ride)
(4 bed, 3 bath, 2350 sq.ft, .16 acres, new construction)

According to your answer, I think i was on somewhat the right track. Last week I ordered longer lug bolts, assuming i would need spacers. I ordered conical 45mm lug bolts.

If i go ahead and order 15mm spacers, I'd need 43mm bolts. 17.5mm spacers would require 45.5mm bolts. Being that they're conical, does that add more length? Which of the two spacer sizes would you recommend I go with?

Thanks bud

Conical wont add any length. The length is measured only in the threads. Either will work. I would probably go with the 17.5mm myself.

[dcline]

can you fit 19x9.5 in the back of a mkIV jetta without any clearance issues or mods to the fenders? and anyone know what offset if you can? the car is lowered 1.75"

[bettaberettaboy]

17x8 ET48 Audi A8 Fat Fives on a B5 Passat sedan 1.8t Lowered 1".......Will they fit help please!!

[JDriver1.8t]

can you fit 19x9.5 in the back of a mkIV jetta without any clearance issues or mods to the fenders? and anyone know what offset if you can? the car is lowered 1.75"

They can fit without problems. For flush fitment, you want the offset around 40mm, and for some poke, down to 30mm or lower. A 265/30/19 would be vertical sidewalls, a 245-55/30/19 would be slight stretch, a 235-225/35/19 would be moderate stretch.

17x8 ET48 Audi A8 Fat Fives on a B5 Passat sedan 1.8t Lowered 1".......Will they fit help please!!

What is the stock specs on your wheels? I'm pretty sure they will fit without problems though. You may just need spacers.

[rubbermydubber]

I have a 08 2.5 Jetta and I'm running fk coils I bought Mercedes wheels and they are staggered 18x8.5 and 18x9.5 with et43 I can't figure out what tire size to run I know that most ppl run 215 40 and 225 40 but I would like more tire just because it seems safer. What is the widest tire I can fit? Or would I just be better off running 225s and 215s any info helps thanks

[JDriver1.8t]

I have a 08 2.5 Jetta and I'm running fk coils I bought Mercedes wheels and they are staggered 18x8.5 and 18x9.5 with et43 I can't figure out what tire size to run I know that most ppl run 215 40 and 225 40 but I would like more tire just because it seems safer. What is the widest tire I can fit? Or would I just be better off running 225s and 215s any info helps thanks

I would recommend a 225/40 front and a 255/35 rear, but I'm not sure how much space you have out back. That is minimal stretch. A 245 in the rear would also work.
If it does rub, the simple solution is just to raise your coils some.

[rubbermydubber]

I would recommend a 225/40 front and a 255/35 rear, but I'm not sure how much space you have out back. That is minimal stretch. A 245 in the rear would also work.
If it does rub, the simple solution is just to raise your coils some.

good deal man you think i can run 225 35 and 245 35? found a yokohama s drive set up for a decent price i do a lot of driving so i think the right size tire is a must...

[JDriver1.8t]

That would make your front tire a lot shorter. You want to keep close to the same outer diameter. That is why you would run a 225/40 and a 245/35. The second number is the ratio of height to width in a percentage; ie 40% of 225 and 35% of 245 for the sidewall.

[rubbermydubber]

Got ya so 225 40 and 245 35 would have the same height in the side wall
It will look even?

[JDriver1.8t]

technically a 255/35 and 225/40 do, but if may run into rubbing problems then a 245/35 is an ok substitute. They will look even. There is only a 1.3% difference in their rolling diameter, and a .17'' difference in sidewall height.

[rubbermydubber]

Thanks a lot dude you've been a huge help. One more question is a 225a stretch at a am I going to be able to go low? Would I be better off running a 215 with a 245? Any chance u know anything about lug nuts lol

[JDriver1.8t]

There is very little about wheels, tires, and suspension that I don't know about.
I'm familiar with lug nuts of many kinds.

225 on a 8.5 is mild stretch (and it depends on the tire as well).
Here is a Bridgestone Potenza 225/40/18 on a 8.5''


Going low is a game of offsets as much as it is tire widths. I really consider people who stretch tires and use smaller tire sizes as cheaters.

Here is how my car sits with 225/40/18 on 8.5 et27f and et23r (and bags)

[rubbermydubber]

sent pm btw ur car is sick

[xxswat718xx]

Hey, haven't been on in awhile but had a quick question but first let me set it up: as i mentioned in previous posts, I came into a set of wheels that had an offset of +48mm. I went ahead and ordered 17.5mm spacers and 14x1.5x45.5mm conical lug bolts. Turns out the wheel holes are too small. The cone shape of the lug bolts won't allow them to sit right. They won't go in all the way.

As I've read in previous posts/threads, my problem has come up with other members.

I was hoping you'd have some insight as to where i might find tuner lug bolts that would solve my dilema? I have found 40mm tuner lug bolts but that's obviously 5.5mm shy of what i was looking for. Would it be unsafe to run them? Thanks

[FMinMI]

Hello all,

I have a 2008 Eos with stock 16 inch rims and tires. I am interested in a set of OEM 17" by 7" wide rims with 235/55/17 tires off a Tiguan that has an offset of ET43. In researching my rims, they are 16 by 7 with an offset of 45. Is a 2 (mm?) offset an issue? I know the speedo will be off (and I can VAGCOM it) but that is not an issue. And it appears that both rims have a 57.1 mm center bore so that should also fit. I just don't have enough knowledge of how the offset factors in, other than if it is off, the tires may run against the inner fender or the suspension...

And what if the rim width was 7.5 inches? What offset would I need to not have to use spaces or whatever -- just a clean bolt on and go rim?

Thanks for the help!

Frank

[JDriver1.8t]

Hey, haven't been on in awhile but had a quick question but first let me set it up: as i mentioned in previous posts, I came into a set of wheels that had an offset of +48mm. I went ahead and ordered 17.5mm spacers and 14x1.5x45.5mm conical lug bolts. Turns out the wheel holes are too small. The cone shape of the lug bolts won't allow them to sit right. They won't go in all the way.

As I've read in previous posts/threads, my problem has come up with other members.

I was hoping you'd have some insight as to where i might find tuner lug bolts that would solve my dilema? I have found 40mm tuner lug bolts but that's obviously 5.5mm shy of what i was looking for. Would it be unsafe to run them? Thanks

I would recommend going longer instead of shorter. I have seen 45mm tuner bolts on ebay occasionally and that is what I would look for. You can also get 50mm bolts, and try them. If they cause problems, then use a hack saw to cut off a few mm.

[JDriver1.8t]

Hello all,

I have a 2008 Eos with stock 16 inch rims and tires. I am interested in a set of OEM 17" by 7" wide rims with 235/55/17 tires off a Tiguan that has an offset of ET43. In researching my rims, they are 16 by 7 with an offset of 45. Is a 2 (mm?) offset an issue? I know the speedo will be off (and I can VAGCOM it) but that is not an issue. And it appears that both rims have a 57.1 mm center bore so that should also fit. I just don't have enough knowledge of how the offset factors in, other than if it is off, the tires may run against the inner fender or the suspension...

And what if the rim width was 7.5 inches? What offset would I need to not have to use spaces or whatever -- just a clean bolt on and go rim?

Thanks for the help!

Frank

I would recommend getting the proper sized tires. There is a good chance those could rub with that tall of a tire. The wheels would bolt on with no problems though. THey would sit out 2mm farther than your current setup. If you went to a 7.5'' width and kept the et43, then they would sit ~6mm farther out and 4mm more inboard.

[Getcheeky]

hi , i have been using the site for a few days now and already got loads of help scanning the pages of the forum. I have now joined and am seeking just a little bit more info if someone doesn't mind. My Mrs has just picked up a peach of a Lupo, or i should probably say a lemon due to its striking yellow.
It currently sits on 13" factory fitted steels. At some point i would like treat her and get some alloys fitted. Without going though any issues of lowering/stiffening or modifying at all can anybody tell me which size rims and tyres i should look for, the only info i got so far was not to exceed a 14" rim otherwise she may need to get stiffer coils/suspension. Thanks for reading.

[Rays_2001gti]

this is my new wheels
18x8.5 front et44
18x9.5 rear et44
my front fenders are rolled. an have fk coils

going from 5x100 to 5x112 what size adapters for the front? looking to be as flush possible don't mind a lil poke if i can't get flush. thinking 16mm adapters up front they told me thats the smallest they make.
rear 18-20mm adapters is what i was thinking
tires thinking
205/40/18 front
215/40/18 rear
what do u say i should do to make them fit.. more confuse about how will they fit on the front..
THANX

[JDriver1.8t]

It currently sits on 13" factory fitted steels. At some point i would like treat her and get some alloys fitted. Without going though any issues of lowering/stiffening or modifying at all can anybody tell me which size rims and tyres i should look for, the only info i got so far was not to exceed a 14" rim otherwise she may need to get stiffer coils/suspension. Thanks for reading.

Sorry, but I don't have any knowledge on this vehicle. You may see if there is a vehicle specific sub-forum that may be of more help.

[JDriver1.8t]

this is my new wheels
18x8.5 front et44
18x9.5 rear et44
my front fenders are rolled. an have fk coils

going from 5x100 to 5x112 what size adapters for the front? looking to be as flush possible don't mind a lil poke if i can't get flush. thinking 16mm adapters up front they told me thats the smallest they make.
rear 18-20mm adapters is what i was thinking
tires thinking
205/40/18 front
215/40/18 rear
what do u say i should do to make them fit.. more confuse about how will they fit on the front..
THANX

How low are you? The lower you are, the more the front wheels pull in, and the lower the offset you need to be flush. For a 1 finger gap, you would want to run 16mm front adapters for a final et of 28mm on a 8.5.
In the rear, I would stick to 18 or 20mm as well. You will be flush, to slight poke possibly. I would run a 215 in front and a 235 in the rear for mild stretch. If you go with a 205 in front, then use a 225 in the rear to keep the stretch near the same front and rear.