|
|
|
2010 2011 BMW 5 Series Forum F10 20x9 ET25 w/ 255/35 PSS ? |
|
Post Reply |
|
Thread Tools | Search this Thread |
11-01-2015, 03:00 PM | #1 |
Enlisted Member
5
Rep 32
Posts |
20x9 ET25 w/ 255/35 PSS ?
Hi there
I'm new to this forum and I have few questions to all of you who have experience with mid-20 ETs and Micheiin Pilot Super Sport tires for the front. Looking to order 20 inch wheels for the summer for my 550i xDrive M Sport. The wheels I am considering as one of my favorites are HRE FF15 (Flow+Form). Worth to mention that my car is lowered with Eibach Pro-Kit springs on the front 1.18" (30mm). It still looks decent but fully ok to me. I have two (three) choices for the front wheels: 1. 20x8.5 ET30 with 245/35 Michelin PSS 2.a) 20x9 ET25 with 245/35 Michelin PSS 2.b) 20x9 ET25 with 255/35 Michelin PSS the rear wheels: 20x10 ET40 with 285/30 if 2.a OR 295/30 if 2.b as I have an xDrive model, I want the best possible circumfence which is in my case 245/285 OR 255/295. Do you think the offset of ET25 will fit w/o problems on my lowered 550i and would you recommend the 255/35 PSS or is it safer to go with the 245/35 even though I do not like stretched tires (and to switch to 20x8.5 ET30?). My dealer told me that the 255/35 would be touching either the fender or inside the wheels base. Is he right? Thanks in advance |
11-01-2015, 04:45 PM | #2 |
General
1569
Rep 29,202
Posts |
I've got 20x9 ET26 with 255/35/20, without rubbing, so I'd get the 20x9 ET25 if I were you.
__________________
F10 520d M-Sport Alpine White | HRE P43SC 20x9+20x11 | Michelin PSS 255/35+295/30 | KW V3 Coilover | M5 Front Sway Bar + M550d Rear Sway Bar | 3DDesign Front Lip | BMW M Performance CF Spoiler | BMW M Performance Diffuser | BMW M Performance Black Grills | BMW M Performance Pedals | |
Appreciate
1
|
11-02-2015, 03:59 AM | #3 |
Enlisted Member
5
Rep 32
Posts |
Thank you remmib.
well ET26 should be almost identical, I guess. My dealer sounds quite sure that there will be some rubbing with 255/35. Don't know why. In case I would chose the 245/35 instead, do you think the tire would show a big stretch on the 9" wide wheel compared to the 8.5"? and what about the 20x10 for the rear? the 285/30 PSS should look perfectly squared. If so, than the 295/30 would look too wide? what do you think? Thank you. EDIT - the 20x9 ET25 wheels have a concave design; the 20X8.5 ET30 not. The rear wheels are concave anyhow. How does a F10 look like with concave wheels all around? |
Appreciate
0
|
11-02-2015, 07:11 AM | #4 | |
Major General
1863
Rep 5,140
Posts |
Quote:
|
|
Appreciate
0
|
11-02-2015, 09:06 AM | #5 | |
Enlisted Member
5
Rep 32
Posts |
Quote:
I went to remmib's thread where he was introducing his beatiful car with the HRE forged wheels. Simply I still wonder whether a wheel with ET25 compared to ET26 with 255/35 PSS can have an issue with rubbing? Does anyone have a pic of exactly the size I am looking for? |
|
Appreciate
0
|
11-02-2015, 03:38 PM | #6 |
General
1569
Rep 29,202
Posts |
The difference between ET25 and ET26 is just 1mm, so very little, it won't show in pics.
Remember 1 inch is 25.4mm. 245/35/20 will look fine on 9", just a slight stretch, but I prefer 255/35. M5 has 295/30/20 on 20x10 wheels, but 285/30 will look better.
__________________
F10 520d M-Sport Alpine White | HRE P43SC 20x9+20x11 | Michelin PSS 255/35+295/30 | KW V3 Coilover | M5 Front Sway Bar + M550d Rear Sway Bar | 3DDesign Front Lip | BMW M Performance CF Spoiler | BMW M Performance Diffuser | BMW M Performance Black Grills | BMW M Performance Pedals | |
Appreciate
0
|
11-03-2015, 04:56 AM | #7 | |
Enlisted Member
5
Rep 32
Posts |
Quote:
yes, I am aware of it. 1mm is almost nothing. I do not like streched tires on wheels but even if I would go for the wider tires, thus 255/35 I guess I need 295/30 for the rear wheels. It is because I want the best possible circumference on both axles as I have xDrive (front/rear: 245/285 or 255/295). Ok, just went to https://www.rimsntires.com/specspro.jsp and the combination 255/285 gives me a difference in circumference of 0.9% compared to 255/295 where there is no difference (the same for 245/285). Maybe I am too cautious |
|
Appreciate
0
|
11-03-2015, 06:12 AM | #8 |
Lieutenant
94
Rep 413
Posts |
You are right with the last numbers.
Fronts/rears are of perfect fit if they are 245/285 (rims 8.5/10) and 255/295 (rims 9.0/10.5). No stretch, tires will be just flush to the lips. The look will not be different, you won't notice this .5" of width but you will notice the cost of it. |
Appreciate
0
|
11-03-2015, 07:21 AM | #9 | |
Enlisted Member
5
Rep 32
Posts |
Quote:
well, I could go with the 20x8.5 front wheel but I guess the ET30 will lead to the wheels to look almost the same as my OEM M351 19x8.5 wheels with ET33. In addition, I have Eibach springs which lowered the car a bit so I don't think it'll look the way I wanted to be. And I definitely don't want to use spacers. what's your opinion? to take the 9" wheels and put 245 tires? the rear 10" wide wheels would get 285. as rimmib also mentioned, the 295 on 10" width would be a bit too much of tire on the wheel. So I could go with the 245 on the 20x9 taking into account the streched look of the tires... Thank you all for your inputs and suggestions |
|
Appreciate
0
|
11-03-2015, 07:45 AM | #10 |
Major General
1863
Rep 5,140
Posts |
The OEM 20" staggered F10 setup differs by 0.9% and is avalible as an option with xDrive.
F: 245/35-20, 26.8" R: 275/30-20, 26.5" There is a rule of thumb to keep the difference below 1% with AWD. Also remember that if the tire diameter differs, the front should always be the one with higher rolling circumference. Tire wear is also important in this discussion. For example if the rear tires has worn out and the fronts still has some thread left: New tires: 10/32" Front tires: 4/32" (6/32" of the thread worn down per side means 3/8" shorter diameter) Rear tires: 2/32" (8/32" of the thread worn down per side means 1/2" shorter diameter) Tire diameters after the rear tires have been changed to new ones. F: 26.8 - 3/8" = 26.4" R: 26.5" In summary even with OEM size where the front diameter is slightly larger than the rear it's really important to change all four tires at the same time. Or else there is always risk for damage to the drivetrain. With this being said you could go with 255/285 tires, the differens is below 1%, the front is taller than the rear and the ratio is the same as for OEM 245/275 combo. |
Appreciate
0
|
11-03-2015, 08:17 AM | #11 |
First Lieutenant
181
Rep 354
Posts
Drives: 2017 F80 ZCP MW/SO
Join Date: May 2015
Location: NY
|
I'd go with 245/35 285/30
I had this on two different set ups the stretch on 20x9 20x10 not even noticeable. I have some pics of my new setup which are Forgestars 20x9.5 and 20x11 there is very slight stretch for these widths. http://f10.5post.com/forums/showthread.php?t=1190696
__________________
Current: 2017 F80 ZCP MW/SO @EnzoRacing PTF BM3 STG 2 GTHaus Meisterschaft GT2 Exhaust SSR Intakes
Swift Springs @drivingwithbenny |
Appreciate
0
|
11-03-2015, 08:47 AM | #12 | |
Enlisted Member
5
Rep 32
Posts |
Quote:
highly appreciate your advises. The figures look crazy. Driving xDrive is a saftey privilege but certainly comes with cost + the fact that one more mechanical part of the car can get broken...particularly the splitter/distributor gear box which can react sensitive to unequal cirumferences. you are right with the slighlty different tire diameters being present in 245/275 and 255/285 combo and indeed, the ratio is the same. I guess I will leave 285 for the 20x10 for sure but for the front I am still unsure. Would love to have the 255 but rubbing is still a questionmark I guess. |
|
Appreciate
0
|
11-03-2015, 08:57 AM | #13 | |
Enlisted Member
5
Rep 32
Posts |
Quote:
Last edited by BimmerV8; 11-03-2015 at 09:04 AM.. |
|
Appreciate
0
|
11-03-2015, 12:08 PM | #14 | |
Lieutenant
94
Rep 413
Posts |
Quote:
The F: 20x9 ET25, 245/35 R: 20x10 ET40 285/30 looks the optimal option. I have F: 20x8.5 ET20 245/35 R: 20x10 ET28 285/30. Michelin PSS provides a visible lip in the front, so the rears don't look level to the fronts, maybe a 5mm rear spacer wouldn't hurt See pics in my car's profile. |
|
Appreciate
0
|
11-04-2015, 03:16 AM | #15 | |
Enlisted Member
5
Rep 32
Posts |
Quote:
Thanks for your suggestion. I think I could live with the slightly strechted front tire then. I wouldn't want to use spacers if it's not that necessary. I will take a look at your pics again. |
|
Appreciate
0
|
11-04-2015, 03:28 AM | #16 |
Lieutenant
94
Rep 413
Posts |
HRE is my favorite brand And due to the 3-piece forged wheels are beautiful but damn too heavy, the next time I am about to consider a HRE monoblock.
Your current choice is smart and the wheels are great. |
Appreciate
0
|
11-04-2015, 04:05 AM | #17 |
Enlisted Member
5
Rep 32
Posts |
been following them for years and I wouldn't choose any other aftermarket wheels. Those guys are damn good. Personally, I do like more the simple look so I would always go for monoblock forged wheels. And they are lighter than the 3-piece wheels. And I like spokes.
My absolute Nr 1 wheels in terms of design are the Alpina Classic wheels made by BBS. The only problem I would have are the stock offsets where I would be forced to use spacers. back to the HRE FF15 wheels. The weight is incredible. I have calculated the weight difference between my current OEM 19" + Dunlop RFT setup and the FF15 20" + PSS. I come up to an overall saving of ~20kg (19.9kg) or 44lbs if I take the FF15. I do not have the exact formula for rotating and unsprung mass but I guess the handling will be much better. I think my bimmer will be grateful. |
Appreciate
0
|
11-04-2015, 08:52 AM | #19 |
Lieutenant General
9159
Rep 14,521
Posts |
gorgeous wheel...i considered the HRE FF01 but decided on something more aggressive!
__________________
~F90Conversion~21"3Piece Forged AvantGardeWheels~KWV1Coilovers~CQUENCE slotted/drilled rotors~GoodridgeStainlesslines~MeisterschaftQuadEx haust~Akrapovic 4"tips~VRSF DP~VRSF CP~TurboSmart BOV~K&N filter~CarbonFiberExteriorComponents~GladenAlphaCo mponents~MatchUp7BMW~Punch P300-12T~ Follow me on Instagram: lsturbointeg |
Appreciate
0
|
11-04-2015, 09:37 AM | #20 | |
Enlisted Member
5
Rep 32
Posts |
Quote:
This is why the Alpina Classic wheel with the turbine style spokes has an ageless design and will always look interesting (IMHO). The FF01 are also good looking wheels, though slightly heavier. At the end, it's all about taste and preferences. |
|
Appreciate
0
|
11-04-2015, 09:38 AM | #21 |
Major General
1863
Rep 5,140
Posts |
The HRE FF15 will look amazing on F10.
The spokes looks similar to the ones on Alpina wheels, but the HRE's have 15 spokes instead of 20 and an open design of the wheel centre which I prefer. |
Appreciate
0
|
11-04-2015, 09:54 AM | #22 | |
Enlisted Member
5
Rep 32
Posts |
Quote:
but, maybe some people are right saying Alpina wheels belong to Alpina cars... |
|
Appreciate
0
|
Post Reply |
Bookmarks |
|
|