Another offset question
09-02-2013, 12:58 PM
#1
Super Member
Thread Starter
Another offset question
Based on the info I've read on this forum I was always sure that my OEM (8.5x18 and 9.5x18) wheels offsets were 25F and 28R. I just looked at the inside of the wheel and found out that it's actually 28 for the front and 33 for the rear...Really confused right now.
PS The only reason i went to check was -because I've bought new set of wheels (8.5x20 and 10.5x20) with 40 and 45 offsets and i was trying to figure out what spacers i will need...
PS The only reason i went to check was -because I've bought new set of wheels (8.5x20 and 10.5x20) with 40 and 45 offsets and i was trying to figure out what spacers i will need...
09-02-2013, 05:28 PM
#2
Post a pic of your wheels. I have a 07CLS550 and offsets are definitely 25 front and 28 rear.
Your spacers will depend on what tires you will run. A 8.5 allows you to run a 245 35 which will 1. fill out the wheel well so you wont have to lower it as much 2. allow you to run a 30 profile rear so you have more protection than a 25.
Get tires on there and you should get some cheap universal spacers for $10 or so just to test fit. I suggest 15mm front and 20mm rear. Get a couple 5mm's too. You will use these again so they are a good investment.
What is much more complicated is lug bolts. You will want to spin the car around the block to let everything settle before making a final decision. Not sure how you will do that with OEM lugs and spacers that wide. I don't think that they will fit.
Your spacers will depend on what tires you will run. A 8.5 allows you to run a 245 35 which will 1. fill out the wheel well so you wont have to lower it as much 2. allow you to run a 30 profile rear so you have more protection than a 25.
Get tires on there and you should get some cheap universal spacers for $10 or so just to test fit. I suggest 15mm front and 20mm rear. Get a couple 5mm's too. You will use these again so they are a good investment.
What is much more complicated is lug bolts. You will want to spin the car around the block to let everything settle before making a final decision. Not sure how you will do that with OEM lugs and spacers that wide. I don't think that they will fit.
09-02-2013, 05:44 PM
#3
Super Member
Thread Starter
This is what my wheels look like
My CLS is lowered with Carlsson ELM so unfortunately sidewall 35 front and 30 rear is not in option.I was thinking to use 15F and 20R spacers Before i found out that i actually have 28F and 33R currently installed...
My CLS is lowered with Carlsson ELM so unfortunately sidewall 35 front and 30 rear is not in option.I was thinking to use 15F and 20R spacers Before i found out that i actually have 28F and 33R currently installed...
Last edited by GuestFromTampa; 09-02-2013 at 06:02 PM.
09-02-2013, 07:33 PM
#4
OK...the mistake that people make most often is the impact on tire size. Another note is that OEM rears sit way to far in IMO.
SirBoostALot just posted pics of 255's et25 in front and 315 et30 in back. Many others run 255 et25 and 305 et25. I have heard some run really flush at 255 et 20 and 305 et20.
For reference, I am running 245's et28 and 285 et18. That is a low rear et but only a 285 tire. I would go more like et25 if I was running a 295.
I think a 255 on yours with a 10mm spacer to take it to et30 would be nice and not have you running a crazy large rear spacer.
If it were me, I would buy one set of 10mm and mount both of them with your new wheels on one side of the car once you have your tires mounted. You will then be at et30 and et35. Then drive it around the block to let it settle and park it level. Tape string with washers for weights on the fenders over the tires. Measure string to edge of tire. Make final decision on rear spacers and order them.
SirBoostALot just posted pics of 255's et25 in front and 315 et30 in back. Many others run 255 et25 and 305 et25. I have heard some run really flush at 255 et 20 and 305 et20.
For reference, I am running 245's et28 and 285 et18. That is a low rear et but only a 285 tire. I would go more like et25 if I was running a 295.
I think a 255 on yours with a 10mm spacer to take it to et30 would be nice and not have you running a crazy large rear spacer.
If it were me, I would buy one set of 10mm and mount both of them with your new wheels on one side of the car once you have your tires mounted. You will then be at et30 and et35. Then drive it around the block to let it settle and park it level. Tape string with washers for weights on the fenders over the tires. Measure string to edge of tire. Make final decision on rear spacers and order them.
09-07-2013, 01:34 PM
#5
Super Member
Thread Starter
I haven't purchase tires yet but just out of curiosity i tried my new wheels on , rear 10.5 with 25 offset (45 - 20mm spacer ) seems to be fine though its a tide fit (made me thinking if i am right that i need 295 tire,maybe i better get a 285 instead
). However front tire 8.5 with 24 offset (40 -16mm spacer ) seems to be sticking out of the fender a little. Unfortunately i cannot lower it to the ground since i dont have tires on...
Any ideas/thoughts/suggestions are greatly appreciated
). However front tire 8.5 with 24 offset (40 -16mm spacer ) seems to be sticking out of the fender a little. Unfortunately i cannot lower it to the ground since i dont have tires on...Any ideas/thoughts/suggestions are greatly appreciated
09-07-2013, 01:51 PM
#6
It must be screwing things up because there is no load on the suspension. Get tires first. Then mount and check. A 8.5 rim with et25 will not stick out so it is tires or you are wrong on the et of the wheels.
Where did u get a 16mm spacer?
Where did u get a 16mm spacer?
09-07-2013, 02:13 PM
#7
Super Member
Thread Starter
Will do, i am still looking for a good deal on tires 
I bought my Carlsson rims from Carlsson distributor who were going out of business, so when i got there to pick them up they said i can grab any 4 spacers free of charge
Unfortunately there was no kits (spacers and lug bolts ) just bunch of spacers and there was no 15mm spacers just 12mm and 16mm so i thought that 16 will be better...Too bad i don't know much about spacers, tire sizes and thing like that so i was really guessing there ...
I bought my Carlsson rims from Carlsson distributor who were going out of business, so when i got there to pick them up they said i can grab any 4 spacers free of charge
Unfortunately there was no kits (spacers and lug bolts ) just bunch of spacers and there was no 15mm spacers just 12mm and 16mm so i thought that 16 will be better...Too bad i don't know much about spacers, tire sizes and thing like that so i was really guessing there ...
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09-08-2013, 10:43 PM
#8
Heres what a 255/35/20 on a 20x9 inch ET30 wheel looks like. (front) Since your wheels are 8.5 inches wide instead of 9, yours will be sucked into the wheelwell 7MM more than mine are with the identical offset. You would want ET23 to have the face of the wheel in the same position as mine in relationship to the fender, or even less offset if you'ld like them to protrude further outwards.
09-08-2013, 11:55 PM
#9
Sir-Boost-A-Lot, You are spot on, however, that is just the wheels. If he is going to also run 255's on a 8.5 wheel then they will be pinched a little more at the wheel but they have the same tread width so will run like a 255 on a 9" with the same offset.
If he runs 245's then it is a whole different story.
If he runs 245's then it is a whole different story.
09-09-2013, 07:55 AM
#10
Super Member
Thread Starter
95viper,
I didn't realize that difference 245 and 255 is so significant. Perhaps i should go with 245 ? Would you be able to share more details on installing 245 and how and where it would be different from 255?
I didn't realize that difference 245 and 255 is so significant. Perhaps i should go with 245 ? Would you be able to share more details on installing 245 and how and where it would be different from 255?
09-09-2013, 08:41 AM
#11
I'm not sure if I'm following you or not. 255 tire on my wheels is pretty square with the wheel, theres maybe just a tad more wheel than tire. I don't think it'll make much difference at all if he runs the 255 on a 8.5 or 9.
I'd have run 265s to protect the wheel a little better but the clearance is already tight with the diameter considered.
I'd have run 265s to protect the wheel a little better but the clearance is already tight with the diameter considered.
Sir-Boost-A-Lot, You are spot on, however, that is just the wheels. If he is going to also run 255's on a 8.5 wheel then they will be pinched a little more at the wheel but they have the same tread width so will run like a 255 on a 9" with the same offset.
If he runs 245's then it is a whole different story.
If he runs 245's then it is a whole different story.
09-09-2013, 10:29 AM
#12
Sirboostalot, You are spot on. We are saying the same thing.
He is trying to get flush with fenders so I am making sure that he understands that there is wheel flush and there is tire flush.
Guestfromtampa, The 245 or 255 is the tire width. Sirboostalot is showing you a 255 et30 pic above. Yes it is on a 9" rim as opposed to your 8.5 but that doesn't matter. The tire edge will be the same. Only the wheel edge will sit in a little more than his.
So step 1 for you is to confirm what tire size you will be running. Then look at the pic above and if you like shoot for spacers to make yours et30.
You said that you have 16mm and 20mm spacers so just get your tires and go from there.
He is trying to get flush with fenders so I am making sure that he understands that there is wheel flush and there is tire flush.
Guestfromtampa, The 245 or 255 is the tire width. Sirboostalot is showing you a 255 et30 pic above. Yes it is on a 9" rim as opposed to your 8.5 but that doesn't matter. The tire edge will be the same. Only the wheel edge will sit in a little more than his.
So step 1 for you is to confirm what tire size you will be running. Then look at the pic above and if you like shoot for spacers to make yours et30.
You said that you have 16mm and 20mm spacers so just get your tires and go from there.
11-15-2013, 10:35 AM
#14
Super Member
Thread Starter
Now i can confirm that if you have 8.5x20 and 10.5x20 wheels you need offsets 20F and 25R if you want your wheels to be flush with the fenders .
Although my offsets are 24 and 20 i am pretty happy with the results and appreciate alot all the help i got here
Although my offsets are 24 and 20 i am pretty happy with the results and appreciate alot all the help i got here
