I was planning on getting the BFgoodrich g-Force T/A KDW, with 295/35/18 in the rear, and 255/40/18 in the front...now would this be hurting my performance? Would i have to re adjust my speedometer?

thankyou

 

http://www.discounttire.com/dtcs/infoTireMath.dos

Speedo will be off by a little but nothing drastic that couldn't wait until your next dyno trip to adjust.

 

how about my performance? will i slow down?

 

anybody else?

 

I've heard from 2 sources out here with quality tires in the rear that if you want to go wider than 285, you might as well go to drag tires at the track. If you are constantly racing people from 0-60, or from a stand still, then maybe 295 would be great. Then you'd want control arm relocation kits if your lowered. Erik

 

I am going 305/35/18 in back on mustang tuning deep dish bullits when I do it. I dont think there is a performance hit as long as the wheel weight is same or less than stock, and the overall diameter doesnt get bigger. The bigger the over all diameter gets, the higher it gears your car, meaning it lets you go faster, but you get there slower.

 

<div class='quotetop'>QUOTE(emperorjordan @ April 23, 2006, 10:02 PM) Quoted post</div><div class='quotemain'>
I am going 305/35/18 in back on mustang tuning deep dish bullits when I do it. I dont think there is a performance hit as long as the wheel weight is same or less than stock, and the overall diameter doesnt get bigger. The bigger the over all diameter gets, the higher it gears your car, meaning it lets you go faster, but you get there slower.
[/b][/quote]

hey cant wait to c that [img]style_emoticons/<#EMO_DIR#>/drool.gif[/img]

 

haha, neither can I. I hadnt seen it on an 05, but Shifty on these forums has them on his, and it is sick as heck. I am not doing mine anytime soon tho, my wheel money will be going to Doug for cams.

 

Yeah I have gotten 30,000 miles on my KDW 2's now and have about 1/32nd of a inch left of tread on the rears. I need to replace them soon. But I have liked them much better than my Nitto 555's. They wore a lot less. I am looking at upping the size from 285/30/20's to something wider but its hard to find them for 20's. I wish I could find a 315/25/20

 

dang i still dont no what to do between picking tires! [img]style_emoticons/<#EMO_DIR#>/banghead.gif[/img]

its between the 555's and the BFG's g-force T/A KDW's [img]style_emoticons/<#EMO_DIR#>/dunno.gif[/img]

its kind of a looks comparison for me now... [img]style_emoticons/<#EMO_DIR#>/headscratch.gif[/img]

Cause in the back the nittos look pretty sweeet..but i dont like them on the front. the BFGs look good in thr front though... hmmmmm

any help?

 

A 295/35/18 is shorter than the stock 235/55/17, so your effective gear ratio will be higher numerically [img]style_emoticons/<#EMO_DIR#>/wink.gif[/img]

 

<div class='quotetop'>QUOTE(MTAS @ April 24, 2006, 5:35 AM) Quoted post</div><div class='quotemain'>
A 295/35/18 is shorter than the stock 235/55/17, so your effective gear ratio will be higher numerically [img]style_emoticons/<#EMO_DIR#>/wink.gif[/img]
[/b][/quote]

is that bad..... [img]style_emoticons/<#EMO_DIR#>/headscratch.gif[/img]

 

<div class='quotetop'>QUOTE(Baginoman2 @ April 24, 2006, 9:59 AM) Quoted post</div><div class='quotemain'>
is that bad..... [img]style_emoticons/<#EMO_DIR#>/headscratch.gif[/img]
[/b][/quote]

Eh, not neceessarily. Here's a formula:

Tire Change (find new gear ratio)

(new tire diameter/old tire diameter) x old axle ratio = new axle ratio

Using this formula, in my case (went to a taller tire):

(27.2/28.5) x 4.10 = 3.91

So if you're going from a stock tire to a shorter one:

(27.2/26.1) x 3.55 = 3.69

So you'll see a slight increase in RPM's through the gears. Maybe a tad quicker off the line, but probably not that noticeable. In my old 96GT I went from 3.27's to 3.73's and wasn't impressed. In the 05, going from 3.55's to 4.10's - BOOYAH [img]style_emoticons/<#EMO_DIR#>/icon_mrgreen.gif[/img]

Edit - looking at the formula, I did the calculations wrong [img]style_emoticons/<#EMO_DIR#>/headscratch.gif[/img] Heck I'm probably way off base now...crap. I always thought going to a taller tire made the effective rear end gear ratio numerically lower, and a shorter tire made it numerically higher [img]style_emoticons/<#EMO_DIR#>/headscratch.gif[/img] Unless that formula is wrong, and I did the calculations correctly by reversing the new/old?

 

<div class='quotetop'>QUOTE(MTAS @ April 24, 2006, 9:18 AM) Quoted post</div><div class='quotemain'>
Eh, not neceessarily. Here's a formula:

Tire Change (find new gear ratio)

(new tire diameter/old tire diameter) x old axle ratio = new axle ratio

Using this formula, in my case (went to a taller tire):

(27.2/28.5) x 4.10 = 3.91

So if you're going from a stock tire to a shorter one:

(27.2/26.1) x 3.55 = 3.69

So you'll see a slight increase in RPM's through the gears. Maybe a tad quicker off the line, but probably not that noticeable. In my old 96GT I went from 3.27's to 3.73's and wasn't impressed. In the 05, going from 3.55's to 4.10's - BOOYAH [img]style_emoticons/<#EMO_DIR#>/icon_mrgreen.gif[/img]

Edit - looking at the formula, I did the calculations wrong [img]style_emoticons/<#EMO_DIR#>/headscratch.gif[/img] Heck I'm probably way off base now...crap. I always thought going to a taller tire made the effective rear end gear ratio numerically lower, and a shorter tire made it numerically higher [img]style_emoticons/<#EMO_DIR#>/headscratch.gif[/img] Unless that formula is wrong, and I did the calculations correctly by reversing the new/old?
[/b][/quote]

interesting [img]style_emoticons/<#EMO_DIR#>/eek.gif[/img]
well all in all, it sounds good [img]style_emoticons/<#EMO_DIR#>/04.gif[/img]

 

<div class='quotetop'>QUOTE(emperorjordan @ April 23, 2006, 10:02 PM) Quoted post</div><div class='quotemain'>
I am going 305/35/18 in back on mustang tuning deep dish bullits when I do it. I dont think there is a performance hit as long as the wheel weight is same or less than stock, and the overall diameter doesnt get bigger. The bigger the over all diameter gets, the higher it gears your car, meaning it lets you go faster, but you get there slower.
[/b][/quote]

I thought these would rub the fender. Am I incorrect? [img]style_emoticons/<#EMO_DIR#>/dunno.gif[/img]

 

<div class='quotetop'>QUOTE(emperorjordan @ April 23, 2006, 10:02 PM) Quoted post</div><div class='quotemain'>
I am going 305/35/18 in back on mustang tuning deep dish bullits when I do it. I dont think there is a performance hit as long as the wheel weight is same or less than stock, and the overall diameter doesnt get bigger. The bigger the over all diameter gets, the higher it gears your car, meaning it lets you go faster, but you get there slower.
[/b][/quote]


Are the 305's going to be DR's? I want 305's on the back bad too but I am in new orleans and it can rain quite a bit here. Can you safely drive DR's in the rain on the streets.....

 

<div class='quotetop'>QUOTE(Mongoose @ April 25, 2006, 7:17 AM) Quoted post</div><div class='quotemain'>
I thought these would rub the fender. Am I incorrect? [img]style_emoticons/<#EMO_DIR#>/dunno.gif[/img]
[/b][/quote]
Depends on the backspacing of the wheel.



<div class='quotetop'>QUOTE(NOLAGT @ April 25, 2006, 7:42 AM) Quoted post</div><div class='quotemain'>
Can you safely drive DR's in the rain on the streets.....
[/b][/quote]
I wouldn't recommend it.

 

IRT Mongoose and NOLAGT, Shifty has the Nitto 555 305/35/18 in back with eibach springs, and they dont rub. I think it looks kickass. I dont know how well they are in the rain, I know they are a drag radial, but I also know several guys who run them on 99-04s year round in the rain.... just gotta be somewhat careful I guess.

 

Yeah I dont think they will rub I just didint know about the rain part. I have seen lots of people who do it I just dont know how bad it really is. Guess I need to just do it huh lol

Why dont companies like bfg make a 305/18 in the kdw's

 

Just to clarify, the Nitto 555 is not a drag radial. The Nitto 555R is the drag radial. The 555 does not come in a 305 width, but the 555R drag radial does.