|
|
|
|
|
|
BMW Garage | BMW Meets | Register | Search | Today's Posts | Mark Forums Read |
|
BMW 3-Series (E90 E92) Forum
>
Track tires on E90 330 - how wide on 17x8.5?
|
|
03-19-2007, 11:27 AM | #1 |
Love my car!
9
Rep 78
Posts |
Track tires on E90 330 - how wide on 17x8.5?
I'm going to be buying a set of dedicated track tires for Autocross and DE events this year. I've already got 17"x8.5" Kosei wheels, but I'm looking for recommendations on tire sizes. I have two main questions:
1) I've heard mixed messaged on whether to keep the same tire width on all 4 tires, or to keep the rears wider. What's the conventional wisdom for track tires? 2) Assuming all 4 tires are the same width, does anyone know the widest tire that will not rub in the front wheel wells? My current "safe" plan is a 235/45-17, but I'd like to a bit wider if possible. Thanks!
__________________
2018 M240i xi (LCI) | Estoril Blue | Dinan Stage 1
|
03-20-2007, 04:40 PM | #2 |
Client Advisor, BMW West Springfield, MA
4
Rep 17
Posts |
|
Appreciate
0
|
03-21-2007, 12:24 AM | #3 | |
Banned
14
Rep 1,137
Posts |
Quote:
|
|
Appreciate
0
|
03-21-2007, 04:34 PM | #4 |
Love my car!
9
Rep 78
Posts |
It looks like 235s might be the best bet. Any thoughts on staggering for track use? 235s all around would work, but would there be any benefit to 245s or 255s for the rears?
__________________
2018 M240i xi (LCI) | Estoril Blue | Dinan Stage 1
|
Appreciate
0
|
03-22-2007, 11:43 AM | #5 |
Moderator
369
Rep 4,745
Posts |
For track use most eliminate the stagger for more neutral handling and ease of rotation.
http://www.tirerack.com/a.jsp?a=AH8&...ires/index.jsp
__________________
Gary. Tire and Wheel Forum Moderator. Tire Rack Sales Rep Gary@Tirerack.com
http://www.tirerack.com/a.jsp?a=AH8&url=index.jsp Please refer to 'Gary/E90 Post' as your previous contact when you order online to help support this forum. |
Appreciate
0
|
03-22-2007, 12:23 PM | #6 | |
Captain
37
Rep 794
Posts
Drives: 2021 M2C, 97 M3
Join Date: Jan 2006
Location: Here, there
|
Quote:
In your case, if you can't go to at least 245 in the front, then you would ideally want to run 235f/245r or preferably 235f/255r. In other words, max out the tire size you can on both axles. If you can eliminate the stagger using that approach, so much the better, but the width is more important than the stagger particularly if it is minimized. Without camber plates, lowering, custom wheel offsets and fender rolling, I doubt you can get wider than a 235 in the front. You can always use other tuning tricks to help counteract the understeering traits from the staggered tire size. This is the approach that most people have had to take with the E46 M3 since it is impossible to get same size tires on stock wheels without making the rears too narrow-I preferred 245/275 on mine for example even after I ran 245/265 which was still pretty loose. My concern is if you stay with 235s on the rear, the rear will be so loose you will be getting wheel spin very easily and the car will be over rotating on even simple gates and transitions making car control much more challenging-it will look cool, but you will be frustrated. Good luck!
__________________
Performance Center Delivery, June 21, 2013: 2013 E92 335is | Le Mans Blue | Gray Leather with Black | 6MT | 19" Style 313's | Michelin Pilot Super Sports | BMW Carbon Fiber Rear Spoiler | |
|
Appreciate
0
|
03-22-2007, 02:21 PM | #7 |
Love my car!
9
Rep 78
Posts |
OK, here's where my ignorance comes in... can someone explain "stagger" vs. "different width front and rear tires" ? I (mistakenly?) thought they were one in the same.
My stock tires are 225f, 255r on 18" rims, so I'm guessing I can put a 255 on my 17" rims for the rears. I'm not sure how to check if 245s would rub on the front... maybe I can try taking some measurements with the wheel turned to its stop. Thanks!
__________________
2018 M240i xi (LCI) | Estoril Blue | Dinan Stage 1
|
Appreciate
0
|
04-01-2007, 11:21 AM | #8 | |
Second Lieutenant
10
Rep 243
Posts |
Quote:
My strong suggestion is that you go with the same size front and rear. there is validity to the claim that since we have no LSD we should maximize grip in the rear, but at the limit you want some slip angle, not to be pushing through the cones of all the turns due to understeer. Also, like gary from the tirerack said, it will maximize the life of your tires due to ease of rotation. If you see one tire cording, you can rotate it and get a few more sessions out of it, but you cant do that if you stagger. 10 extra mm in the rear is definitely not worth giving up the ease of rotation.
__________________
|
|
Appreciate
0
|
04-01-2007, 12:33 PM | #9 |
Brigadier General
431
Rep 4,380
Posts
Drives: 2014 Audi A4 / 91 Track Miata
Join Date: Jan 2007
Location: San Jose, CA
|
One thing to remember....R compound tires run WAY wider than conventional tires. I have seen some Hoosiers that were mega wide for the size show on the side of the tire. I had a set of R3S03s before...on my 325i race car...btw, they flat spot really easily.
__________________
Car is now gone .... :-( |
Appreciate
0
|
04-01-2007, 01:09 PM | #10 |
Second Lieutenant
10
Rep 243
Posts |
true, but i dont know if he said he was actually doing r-comps or not. with an r-comp, 235 on an 8.5in kosei should be PLENTY.
__________________
|
Appreciate
0
|
04-02-2007, 05:39 PM | #11 |
Private First Class
2
Rep 122
Posts |
Stagger refers to different circumference tires from SIDE TO SIDE, not front to rear. It used on oval tracks to help the car in the corners (right side of the car travels farther than the left). The tradeoff is that the rear tires (rear-wheel-drive car) slip in relation to each other on the straights.
Now, as to the original question... It is possible to mount a 285 section tire on an 8-inch rim, but it takes some skill. So a 295, maybe even a 305, might be possible on an 8.5-inch rim. That is not to say, however, that it will work on a particular car - the tire might rub. I don't know the maximum width tire that will work on either end of the e90, but I sure would like to find out if someone knows. Richard |
Appreciate
0
|
04-11-2007, 01:18 PM | #12 |
Private First Class
15
Rep 104
Posts |
could I put my E39 M5 wheels and tires on my rear end of the 335i? They are as follows 91/2JX18 ET:22 with 275 40 18 Yokohama tires, I am just wanting to use them for a short run where I need max traction.
Will |
Appreciate
0
|
Bookmarks |
Thread Tools | Search this Thread |
|
|