Tires,Tires,Tires - Nissan Armada Forum: Armada & Infiniti QX56 Forums
User Tag List

Reply
 
Thread Tools Display Modes
post #1 of 153 Old 07-27-2005, 07:25 PM Thread Starter
cenglebert
SHIFT_Lurker
 
Join Date: Jul 2005
Location: Pennslyvania
Posts: 10
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
cenglebert is on a distinguished road
Tires,Tires,Tires

Finally did it! Bought new tires to replace the stock contis on the QX56. After agonizing over Mich vs BFG and trying to get as close to stock as I could. I ordered a set of Toyo Proxy ST 305-60/18. Wow! the tires are 12 inches wide, (stock is 10 inches) so they just fit, with no modifications. They look really aggressive and great! Believe it or not the mileage on a long-trip just this weekend went up from 15 mph to 16 mph!

I put these tires on the wife's Murano as was really impressed so needless to say when I check out www.powerdog.com and the the 305-60/18 was very close to stock I was excited. After being worried about the widith issue when we were done mounting them they are da bomb!
cenglebert is offline  
Sponsored Links
Advertisement
 
post #2 of 153 Old 07-27-2005, 07:48 PM
92TripleBlack
SHIFT_Hardcore
 
92TripleBlack's Avatar
 
Join Date: Dec 2004
Location: Orlando
Posts: 4,363
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
92TripleBlack is on a distinguished road
Stock are 265-70-18 which are 10.5" wide vs 12.2".
The new tires are 1/4" shorter. Overall, a good trade and should look nice.

Last edited by 92TripleBlack; 12-07-2005 at 04:51 PM.
92TripleBlack is offline  
post #3 of 153 Old 10-13-2005, 11:50 AM
rebaylor
SHIFT_Newbie
 
rebaylor's Avatar
 
Join Date: May 2005
Posts: 60
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
rebaylor is on a distinguished road
Question Tire vs Rim

You've had about 3 months now with your new shoes, so how are they performing? I was all ready to run out and copy your buy until I went to the Toyo website for technical data.

Toyo's specs on the 305/60-18 tire you bought show a rim width range in inches of 8.5-9.0-11.0, and the Nissan rims are 8.0 inches. Offhand, I'd be tempted to say "It's only a half inch," but it is really an inch because 9.0" is recommended as the optimal rim width with 8.5" being the minimum width Toyo considers structurally safe.

Your tire dealer undoubtedly knows a lot more than I do about the relevance of this, and I'm hoping some other Forum members that also do are willing to share their advice. I've noted in the short time I've been on here that there are lots of members missing a shyness gene when it comes to volunteering advice, and, although their opinions sometimes collide, there is a wealth of knowledge out there for the benefit of the rest of us.

Regards,
R Baylor
rebaylor is offline  
post #4 of 153 Old 10-13-2005, 03:14 PM
92TripleBlack
SHIFT_Hardcore
 
92TripleBlack's Avatar
 
Join Date: Dec 2004
Location: Orlando
Posts: 4,363
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
92TripleBlack is on a distinguished road
Quote:
Originally Posted by rebaylor
You've had about 3 months now with your new shoes, so how are they performing? I was all ready to run out and copy your buy until I went to the Toyo website for technical data.

Toyo's specs on the 305/60-18 tire you bought show a rim width range in inches of 8.5-9.0-11.0, and the Nissan rims are 8.0 inches. Offhand, I'd be tempted to say "It's only a half inch," but it is really an inch because 9.0" is recommended as the optimal rim width with 8.5" being the minimum width Toyo considers structurally safe.

Your tire dealer undoubtedly knows a lot more than I do about the relevance of this, and I'm hoping some other Forum members that also do are willing to share their advice. I've noted in the short time I've been on here that there are lots of members missing a shyness gene when it comes to volunteering advice, and, although their opinions sometimes collide, there is a wealth of knowledge out there for the benefit of the rest of us.

Regards,
R Baylor
It is close. I know a lot of guys are running the 295-70-17 Terra Grapplers on the stock 17s, and this is a half inch out of spec. One guy blew a bead while riding low pressure. You also have to be concerned with abnormal wear as they are probably puckering. Not just a safety issue. I decided a rim change was in order to get 305 on mine.
92TripleBlack is offline  
post #5 of 153 Old 10-13-2005, 07:27 PM
rebaylor
SHIFT_Newbie
 
rebaylor's Avatar
 
Join Date: May 2005
Posts: 60
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
rebaylor is on a distinguished road
And that's the good news!

Initially wanting to improve appearance without investing in new treads before reading this thread, I purchased some 18x8 polished alloy wheels on ebay that are bpresently on their way toward me. I knew I should have gone for a 9" width, and wanted to, but I found a good price on what I bought, figuring I'd just stay with the stock tire size. Those 12" wide Toyos sounded great.....
rebaylor is offline  
post #6 of 153 Old 10-13-2005, 07:32 PM
92TripleBlack
SHIFT_Hardcore
 
92TripleBlack's Avatar
 
Join Date: Dec 2004
Location: Orlando
Posts: 4,363
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
92TripleBlack is on a distinguished road
Here's the post on everything tires, rims, etc. again.
I keep getting asked where I used the heat gun to melt the tire well enought to make my tires fit without rubbing. Here's a pic. I heated it up untilit was shiny, then used a screwdriver handle to hold the hot plastic in place until it cooled in new position. Anything larger on my mada and I would have had to either lift, cut or bend metal, or had rubbing.

There have been many different people asking what will and won't fit, how big is this tire, etc.

I suggest 18" stock wheel people get Michelin Cross Terrain SUV if you want all season, BFG AT if you want all terrain, or get different size rims if you want better tires.

Some tires I know nothing about:
Kumho Road Venture AT KL/78 comes in 265-70-18
Geolander H/T-S comes in 275-65-18 and 285-60-18 which are slightly shorter(1/2") and a little wider (1/2" - 1")
Yokohama AVS S/T again in 285-60-18

Not much else out there.
Tire Stuff
This is how to read the sizes and calculate the size in inches.

The stock 18" size is 265-70-18.
The first number is the width of the tread.
The second number is width of the sidewall expressed as a percentage of the tread width.
The third number is the rim diameter.

Converting, 25mm = about 1".
Using this, the tread width is 265 / 25 = 10.6" wide.
The sidewalls are (265 x 0.7) / 25 = 7.4" tall
The overall diameter is 18" (Rim) + 14.8 (Two sidewalls) = 32.8"

The stock 17" size is 285-70-17
This becomes 285 / 25 = 11.4"
(285 x 0.7) / 25 = 8" sidewall
17" + 8" + 8" = 33" overall diameter.

Using this, here are some common replacements that people like.
Yokohama Geolander H/T-S GO51 in 275-65-18
275 / 25 = 11"
(275 x 0.65) / 25 = 7.15" Sidewall.
18" + 7.15 + 7.15 = 32.3" Smaller diameter than stock by 1/2".

BF Goodrich All Terrain T/A KO in 285-65-18
285 / 25 = 11.4"
(285 x 0.65) / 25 = 7.4"
18" + 7.4 + 7.4 = 32.8"

The largest ones you can fit without lifting are 305-55-20.
This works out to
305 / 25 = 12.2"
(305 x 0.55) / 25 = 6.7"
20" + 6.7 + 6.7 = 33.4"

Larger tires in width or height will start rubbing like crazy. These actually rubbed a little on mine and I needed to melt the tire wells with a heat gun to make them fit. See here about doing this. http://www.clubarmada.com/forums/showthread.php?t=1310

You can use this system to read any tire size and convert to see if they will fit. Smaller than 17" rims and you will have problems with the brake calipers fitting. Lower than 6" in sidewall and you will start having problems with off-road driving. Over 7" is preferred for off road. Under 5" and you will have problems on groomed dirt roads and potholes. You will also loose some ride quality and tow rating. Under 4" and you better start riding on freshly paved stretches.

The stock tires are All season Highway tires. All-season highway tires are good in most conditions but not optimal in snow or off road. The stock tires are poor examples of HWY A/S tires and really just stink in most conditions. Changing to a good quality tire will increase most tire properties. A/T tires increase poor weather traction and off road traction but add weight, may add noise, and may ride a little rougher than Highway tires. Makers can often design the tires to eliminate excess noise and rough ride.

Rim Stuff:
Stock rim sizes are 17" x 7.5" and 18" x 8".
Larger rims give you better handling (To a point) and a firmer ride. They also allow for larger brakes. You give up progressively tow rating, mileage, acceleration, smoothness of ride or ride quality, rim strength, and gain weight and cost. Forged rims are more dense and less prone to cracking than cast. This allows for either stronger rims or more delicate rim designs while retaining strength. They weigh more per amount of material used as the metal is more dense. They are usually twice or more as expensive as cast rims.

Rim width is also critical. A rim that is too narrow will pucker the tire. This may lead to the tire breaking its bead and immediately deflating, causing a crash and destroying the tire, etc. A rim that is too wide will have the rim stick out as far as the tire sidewall. This makes rims prone to scraping curbs and breaking beads as well. Check with the maker to see what width tire you should get, usually 2"-4" or so wider than the rim width.

Rims come in painted, Aluminum, and Chrome finishes. Painted is the most resistent to weather, salt, etc. Aluminum is usually brushed or polished. These require a lot of maintainence to keep looking good. Expect to do a lot of polishing. Aluminum can often be clear coated to keep most of the shine of a polished rim but give them more resistence to salt, tarnishing, etc. If this is available, I"d go this route if you choose aluminum. Chrome is the least resistent to salt but very resistent to tarnishing. You will polish, but not as much as with aluminum. Keep a good coat of wax on them and clean the brake dust off weekly and you will be fine. For salt, wash and scrub them the day you get salt on them or they may start tarnishing and pitting.

To calculate the change in diameter to find the amount the odometer is off, to this:

Diameter x 3.14 (pie) gives you the circumference.
Stock is 32.8 x 3.14 = 103 inches.
My tires are 33.4 x 3.14 = 104.9 inches.

104.9 / 103 = 1.018. Multiply this by the speed you read and you get your actual speed. 65mph x 1.018 = 66.19mph actual. Not much to worry about.

However, if you make a tire larger or smaller than the rest, say put big tires on the back, this will throw off the VDC and ABS. There is a 2-3% buffer built in for replacing a worn blown tire with a fresh new tire but put on dramatically different sizes, say a 35" with 33" tires, and you will have problems. Don't forget you need to change your spare also if you change your tires by a lot.

Q .. for those that have gone BIG .. say only to 20" .. are there wheels available (aftermarket) w/the low pressure sensors .. or by changing to aftermarket wheels do you give up that feature?

A. The pressure sensor is on the valve stem of the stock tires. If you want them, you need to dismount the stock tries, remove the sensors, and add them to the new tires. You probably will want to remount the old tires. Up to you.

Q .. by giving up the low pressure warning .. what else do you give up? I'm wondering if there are any other things tied into the low tire pressure warning system?

A. Nothing. The loss of the sensors will make a small gauge light go on from time to time. I've seen it twice in 5K miles and it goes away when you restart the engine.
Hope this helps.

Lowered SUVs are Beneath me. W in '04. Thank me!

'05 Armada LE 4x4, Red Brawn, Graphite, Tech, DVD, Terra Grapplers 305-55-20, MB Motoring Express 20x9, 6000k HID lows, Silverstar 9005 highs & 893 fogs, Lund Stainless Steel Bug Shield, Timing advanced 2 degrees
'92 Vette Vert Black,6-Spd,Lots of mods (For Sale)
'04 G35 Sedan-Black,Sport,wing,all opt.
'02 VW Jetta GLS 1.8T (Hers)
'04 Kawi STX-15F JetSki

Last edited by 92TripleBlack; 10-13-2005 at 07:38 PM.
92TripleBlack is offline  
post #7 of 153 Old 12-06-2005, 06:54 PM
cfranzen
SHIFT_Enthusiast
 
Join Date: Oct 2004
Location: Kansas city
Posts: 120
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
cfranzen is on a distinguished road
So TB these various size options can be used without causing issues with the vdc and such from working properly? And by the way have you had any experience with Cooper tires?
cfranzen is offline  
post #8 of 153 Old 12-06-2005, 07:59 PM
92TripleBlack
SHIFT_Hardcore
 
92TripleBlack's Avatar
 
Join Date: Dec 2004
Location: Orlando
Posts: 4,363
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
92TripleBlack is on a distinguished road
Quote:
Originally Posted by cfranzen
So TB these various size options can be used without causing issues with the vdc and such from working properly? And by the way have you had any experience with Cooper tires?
Yes. There are no problems with using any different tires and VDC, etc. as long as all 4 have the same basic outer diameter. If you run with 35" tires and have a 32" spare, you may have a problem if you need to mount the spare. There is a small window that is an inch or so difference you can have before there is problems.
Cooper is generally a cheap tire and not a top tier tire company. Say that fast 5 times.

Lowered SUVs are Beneath me. W in '04. Thank me!

'05 Armada LE 4x4, Red Brawn, Graphite, Tech, DVD, Terra Grapplers 305-55-20, MB Motoring Express 20x9, 6000k HID lows, Silverstar 9005 highs & 893 fogs, Lund Stainless Steel Bug Shield, Timing advanced 2 degrees
'92 Vette Vert Black,6-Spd,Lots of mods (For Sale)
'04 G35 Sedan-Black,Sport,wing,all opt.
'02 VW Jetta GLS 1.8T (Hers)
'04 Kawi STX-15F JetSki
92TripleBlack is offline  
post #9 of 153 Old 12-07-2005, 03:38 PM
cfranzen
SHIFT_Enthusiast
 
Join Date: Oct 2004
Location: Kansas city
Posts: 120
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
cfranzen is on a distinguished road
Thanks for the info TB. I think I have decided to give the Cooper Discoverer H/T plus a try. I have heard alot of good things about them from friends. I will go with the 285/60 R18. My spare will be the stock Crapinental and I think there is about an inch difference in Diameter between the two. Hopefully I won't have to use it but should get me through if I need to.
cfranzen is offline  
post #10 of 153 Old 12-07-2005, 04:50 PM
92TripleBlack
SHIFT_Hardcore
 
92TripleBlack's Avatar
 
Join Date: Dec 2004
Location: Orlando
Posts: 4,363
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
92TripleBlack is on a distinguished road
Here's the difference. They will look small.
Stock Tire - 265/70R18
Tire 1 - 285/60R18

Section Width: 10.43 in 265 mm
Section Width: 11.22 in 285 mm

Rim Diameter: 18 in 457.2 mm
Rim Diameter: 18 in 457.2 mm

Rim Width Range: 7 - 9 in
Rim Width Range: 8 - 10 in

Overall Diameter: 32.60 in 828.04 mm
Overall Diameter: 31.46 in 799.08 mm

Sidewall Height: 7.30 in 185.42 mm
Sidewall Height: 6.73 in 170.94 mm

Radius: 16.30 in 414.02 mm
Radius: 15.73 in 399.54 mm

Circumference: 102.4 in 2600.9 mm
Circumference: 98.83 in 2510.2 mm

Revs per Mile: 638.0
Revs per Mile: 661.1

Actual Speed: 60 mph 100 km/h
Speedometer1: 62.1 mph 103. km/h

Speedometer Difference: - Speedometer Difference: 3.620% too fast
Diameter Difference: - Diameter Difference: 3.5%
92TripleBlack is offline  
Reply

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode


Forum Jump

Posting Rules  
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off