Nissan Frontier Navarra [ARCHIVED]

**karlitozz** · February 19th, 2010 10:51 PM

Advantages to Staying Close to the Original Tire Size Diameter

Most of today’s cars and trucks are computer controlled. Wheel speed plays an important role in sending signals to the vehicles computers, which in turn tells other vehicle components what to do. By going to drastically different tire diameters, some of the vehicle components that may be adversely affected include:

Speedometer reading accuracy
Odometer accuracy
Transmission shift points
Computerized traction control
Anti-lock brake system (ABS)

So it’s important to try and stay as close to the original factory tire diameter as possible. Going to a larger wheel and keeping the original tire diameter will still allow for a low profile tire that will improve the appearance and handling of the vehicle.
How to Choose the Right Diameter Tire for Wheel Plus Sizing

The tire industry doesn’t make it easy to tell what the overall diameter of a tire is by looking at the tire size. To even complicate matters, part of the tire size is millimeters (width) and part of the tire size is in inches (wheel diameter). The first thing that needs to be done is to determine the overall diameter of the original tires. As an example lets say the original tire size is P225/60R16.

Tire Width - The 225 represents the width of the tire in millimeters. To convert the width into inches, multiply the 225 by .03937, which equals 8.86 inches rounded. So the width of the tire is 8.86 inches.
Sidewall Height - The 60 represents the aspect ratio of the sidewall height to the width. In this example the sidewall height is 60% of 225 millimeters or converted 60% of 8.86 inches, which equals 5.32 inches rounded. So the sidewall height of the tire is 5.32 inches.
Wheel Diameter – The R just stands for radial, so this is not a concern for tire plus sizing. The 16 however indicates the diameter of the wheel in inches.
Overall Tire Diameter- Now that everything is converted to inches, simply double the sidewall height (above and below the wheel) and add the wheel size. So the original overall tire diameter is 5.32 + 5.32 + 16.00 or 26.6 inches rounded.

Plus Sizing to 20 Inch Wheels as an Example

Again the diameter of the new tires should be close to the diameter of the original tires. Using the formula above to find the right tire diameter, it’s best to play around with some sizes. Using 20-inch wheels as an example, some of the tire diameters that are close to the original tire diameter are:

245/35R20 - Overall Tire Diameter 26.8” (.03937 X 245) = 9.65” tire width X 35% aspect ratio = 3.38” sidewall height. 3.38 + 3.38 + 20.0 = 26.8” tire diameter
235/35R20 - Overall Tire Diameter 26.5” (.03937 X 235) = 9.25” tire width X 35% aspect ratio = 3.24” sidewall height. 3.24 + 3.24 + 20.0 = 26.5” tire diameter
275/30R20 - Overall Tire Diameter 26.5” (.03937 X 275) = 10.83” tire width X 30% aspect ratio = ” sidewall height. 3.25 + 3.25 + 20.0 = 26.5” tire diameter

Since the original overall tire diameter is 26.6 inches, all of the above examples are close. If performance is the main reason for plus sizing, the 275/30R20 would be the best choice. The original tire width is 8.86 inches and this choice in tire size would add close to 2 inches on the width of the tire. Be careful to make sure that adding 2 inches to the width of the tire doesn’t interfere with the vehicle fender well when turning.
Always pick a good speed rated tire, especially if performance is the reason for plus sizing. By plus sizing to a 275/30R20 from a 225/60R16, the tire diameter virtually stays the same but 2 inches are added to the width. The sidewall height also dropped by over 2 inches from 5.32” to 3.25”. The cars computer will function properly, the vehicle looks great and handles better, a win-win all around.

**ReccaH** · February 20th, 2010 08:13 AM

sir karlitozz i like your post, nag take notes pa ko.. kinda mahal din pala new set of shoes from 95 to 120 thousand. i heard na me parating daw na fender extender ang nissan is this true?

**bossing47** · February 20th, 2010 12:19 PM

Originally Posted by ghost recon

i'm planning to have my 18 inch chrome wheels replaced because rust makes it look ugly. chromes doesn't really have a chance of my dogs continuous pee.

where can i found a nice 18 inch powder coated wheel?

continous dog pee? me solusyon dyan ser... pahiran nyo lang ng kaunting baygon yung mags nyo, wag lang me maamoy.. di na wewewe yan dyan hehehehe...

baygon eh parang gas lang, tar remover pa...

**cydepx44** · February 20th, 2010 12:41 PM

Originally Posted by ReccaH

sir karlitozz i like your post, nag take notes pa ko.. kinda mahal din pala new set of shoes from 95 to 120 thousand. i heard na me parating daw na fender extender ang nissan is this true?

ok din yan sir if true. pero if you need flares right away meron na ako available para sa 4x2.

**karlitozz** · February 20th, 2010 12:47 PM

* reccah glad to be of help. not sure sa fender flares you mention pero saw this sa web.bushwacker brand

**cydepx44** · February 20th, 2010 02:03 PM

Originally Posted by karlitozz

* reccah glad to be of help. not sure sa fender flares you mention pero saw this sa web.bushwacker brand

pang 4x4 lang ito sirs. wala sila nung pang 4x2 fender, inquired with them it bolts on to the stock 4wd fender.

**ghost recon** · February 20th, 2010 03:37 PM

Originally Posted by cydepx44

pang 4x4 lang ito sirs. wala sila nung pang 4x2 fender, inquired with them it bolts on to the stock 4wd fender.

the same yan sa rims ko kaya lang masyado malaki yong rubber.

ok lang yan kung walang kalawang

.

**deanezel** · February 20th, 2010 07:49 PM

aircon and fan(especially) smell--have the same problem with my navara since 1 1/2 mos old pa lang ito. Amoy pawis na jeans or sometimes amoy fish.Quite sure the smell was not coming from the inside or sa akin as i've changed all the covers and mats.annoying to the point na di ako makapag-pa carpool.the casa tried flusing and blowing, improved significantly only for about 2 days, balik na ulit sa dati after.di naman binaha ang underchassis. any thoughts abt this?already tried the usual maneuvers to no avail. could it be from where the a/c sources the air?thanks.

**mikko_018** · February 20th, 2010 07:49 PM

Good day NAV gurus... astig ng modification... angas tignan

**ryan824** · February 20th, 2010 09:14 PM

Originally Posted by loki_chaos

*ryan - sali na kayo sir sa NCP! dalawa tayong naka platinum silver...

*bossing - yes sir, dalawa ang blue ng nav... yung closest sa dark blue, yung nebular blue... pagkakuwa nyo ng unit nyo sir, magiging tatlo na kayo kung nebular blue kunin nyo... kung majestic blue naman, dalawa kayo... hehehe...

join us on the first funrun... feb 28, unofficial date... will post here when confirmed...

last time i checked, city driving i get 9-10km/li and hi-way 12-14km/li... i also drive a 4x2 matic...

got to test my fc for the first time i clocked 13km/li. break in period 80 to 100 kph.yahoo.....