20 inch wheel guys with 25 section height tires
#1
Members
Thread Starter
Join Date: Aug 2011
Location: Bay Area, CA
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 550i
![Default](https://5series.net/forums/images/icons/icon1.gif)
Hey guys,
I was trying to order some 285/25r20 for my 20x11's at my local tire shop but they refuse to order the tire for me saying the load index is to low. Tires I want are the Michelin super sports, the load index on them is 93 and the shop said it needs to be 96 or higher? This must be some new insurance policy or something?
I thought guys have been running this setup for years with no problems, whats the big deal now?
I was trying to order some 285/25r20 for my 20x11's at my local tire shop but they refuse to order the tire for me saying the load index is to low. Tires I want are the Michelin super sports, the load index on them is 93 and the shop said it needs to be 96 or higher? This must be some new insurance policy or something?
I thought guys have been running this setup for years with no problems, whats the big deal now?
#2
Contributors
Join Date: Mar 2010
Location: Los Angeles, CA
Posts: 3,098
Likes: 0
Received 4 Likes
on
4 Posts
My Ride: BMW
Model Year: 2006
![Default](https://5series.net/forums/images/icons/icon1.gif)
Actually, most members here that are running on 20s (including myself) run 35 front 30 rear. 25 on the rear is just way too harsh and seems too thin for the rims.
#5
Senior Members
Join Date: Nov 2008
Location: OC, SoCal
Posts: 843
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: '05 545i SMG, 35% Tint, LED Angel Eyes
![Default](https://5series.net/forums/images/icons/icon1.gif)
I've run 285/30/20 in the rear since I have 10.5". No rubbing whatsoever unless your rear wheel offset is less than 18.
#6
Senior Members
Join Date: Feb 2005
Location: Norway
Posts: 533
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 2004 BMW E60 525dA - Comf. seat, Hi-Fi Logic7, Navi prof, carphone prof, seat ventilation, Dynamic Drive, Active steering ++ Retrofits:- 9x20 & 10x20 BMW Style 101 w/ 255/30 ZR20 and 305/25 ZR20- 35/35 H&R sport springs - M-sport package- M5 trunk li
![Default](https://5series.net/forums/images/icons/icon1.gif)
30/25 profile is the right profile for E60s (check tyre calculators). I drive with 255/30-20 and 305/25-20 at my E60. I have also drives with 245/30-20 and 285/25-20 and 295/25-20. All tyres with high enough LI.
#7
Members
Join Date: Apr 2011
Location: Sacramento California
Posts: 243
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: ///M5
![Default](https://5series.net/forums/images/icons/icon1.gif)
I wouldnt go 285/25 rear on a 20x11. Either do 305/25/20 or the ideal 295/30/20 for a 20x11 and your set. 285 will give a stretch and with a 25 series your gonna risk wheel damage sooner or later. I ran 305/25 on a 11" wheel and was fine but it will also depend on the quality of wheel.
Try to match the rolling diameter of your stock setup. Stretching tires on rims lowers the rolling diameter so keep that in mind. Ideal side for a 285 tire is a 10" wheel so most of the calculations you will see online are based on this so if you stretch or square off more than whats been listed you will encounter different rolling diameters. GL. PM me if you need help, I been thru 6 wheels on my M5, call me a wheel ratchet lol.
Try to match the rolling diameter of your stock setup. Stretching tires on rims lowers the rolling diameter so keep that in mind. Ideal side for a 285 tire is a 10" wheel so most of the calculations you will see online are based on this so if you stretch or square off more than whats been listed you will encounter different rolling diameters. GL. PM me if you need help, I been thru 6 wheels on my M5, call me a wheel ratchet lol.
#9
Members
Thread Starter
Join Date: Aug 2011
Location: Bay Area, CA
Posts: 68
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: 550i
![Default](https://5series.net/forums/images/icons/icon1.gif)
I did fit Michelin Pilot Super Sport 295/30r20s on the 20x11(et25) but ran into a slight problem. Since the Michelin's run a bit larger/wider, the tire rubbed like crazy and the fender under compression sat on top of the tread.
I had this setup on my M5 and it fit fine but the M5 fenders are a bit different from the 550i. I did have the fenders rolled yesterday so the stretched 285 "should" fit with little to no rubbing on my 550i.
What have you guys been running in the front? 255/35r20 or 245/35r20? The 255's fit but they have a slight rub on the plastic liners when turning or under compression. I'm tempted to jump down to the 245 to minimize the rubbing. The front wheels are 20x9 et20.
My biggest crutch in this whole wheel situation is I have this stupid rolled curb I have to traverse to get my ride into the garage. With the 295s I almost got stuck lol!
I had this setup on my M5 and it fit fine but the M5 fenders are a bit different from the 550i. I did have the fenders rolled yesterday so the stretched 285 "should" fit with little to no rubbing on my 550i.
What have you guys been running in the front? 255/35r20 or 245/35r20? The 255's fit but they have a slight rub on the plastic liners when turning or under compression. I'm tempted to jump down to the 245 to minimize the rubbing. The front wheels are 20x9 et20.
My biggest crutch in this whole wheel situation is I have this stupid rolled curb I have to traverse to get my ride into the garage. With the 295s I almost got stuck lol!
#10
Members
Senior Members
Join Date: Apr 2012
Location: Concord, CA
Posts: 953
Likes: 0
Received 0 Likes
on
0 Posts
My Ride: Alpine E60, '09 535i-Premium, Sport and Comfort Access PackageMods: Lux H8 V3 Angel Eyes, Weisslicht LED license plate lights, Interior LED lights, RPI Scoop, Matte Black Grills, Smoked LED side markers & side reflectors, 35% tint all around, and a 3
![Default](https://5series.net/forums/images/icons/icon1.gif)
If you are going with a 255 upfront go with a 255/30r20. That's is what I am running and I will have just the slightest rub when I hit a big bump. However I did just get all four of my fenders rolled so now I don't rub at all and now my rears are ready for 295's.
Thread
Thread Starter
Forum
Replies
Last Post
socale39
Complete Car Sales
9
09-05-2023 08:30 AM