Wheel FAQ

[BlackBlood]

napulot ko sa net sana makatulong

rim width x 25.4 x 1.1 = minimum tire width
rim width x 25.4 x 1.3 = maximum tire width

example

7 inch rim x 25.4 x 1.1 = 195.58
7 inch rim x 25.4 x 1.3 = 231.14

so 195 to 225 ang optimal tire sizing

mga low profile below 50 stick to lower bound
sa mga 50 up kaya mas mataas

optimal daw to para mamaximize ang tire contact patch at ang side wall use + safe na din from the bead popping off compared pag sobrang stretched ang tire

pero kung porma hipari na! hehehe hth!

[R-A-Y]

So this applies to tire width?

Yeah sounds just right

This will be very useful info

[R-A-Y]

Here's something I picked up from the NASIOC Website. I adopted and changed it a bit to apply to a more general application

Wheel FAQ

The primary purposes of aftermarket wheels are aesthetic appeal, the potential reduction of weight by their reduced rotational mass, and the ability to accommodate wider tires.

Which manufacturer is best?
This topic is highly debated. There are just too many factors to consider. The main category breakdowns are:
a. Price
b. Looks
c. Wheel weight savings over current wheel weight.

What wheel material is best?
Most wheel manufacturers use various proprietary alloy compositions. There is no irrefutable evidence that one alloy is better than the other.

Which wheel construction method is best?
There is no irrefutable evidence that one design is better than the other. This website has an excellent description of the different wheel construction methods.

What is wheel offset?
The offset of a wheel is the distance from its hub mounting surface to the centerline of the wheel.

Why is wheel offset important?
Wheels using improper offsets can cause damage or accelerated wear on suspension components or body panels.

Just because it fits does not mean it is right

Are there any downsides to wheels?
There have not been significant amounts of problems with wheels. Heavier weight wheels, through rotation mass can multiply their weight which will result in decreased performance. For example, an additional 5 lbs per corner of wheel weight (20 lbs total) has an equivalent effect on acceleration of 50-80lbs of weight in the car. Also, as you increase wheel size, realize that you are increasing the wheel's distance from the center of rotation. Due to wheels having rotational mass, larger wheels have a larger rotational mass. For example, spinning a 1lb weight 8 inches from the center of a wheel requires less work than spinning that same weight 9 inches from the center. Unsprung weight: "Unsprung weight is the total weight of components not supported by the springs. This includes control arms, brake components, spindles, wheels and tires. Reducing unsprung weight is a key factor to improving a vehicle's handling." Among other things, it allows the suspension to react faster and improves the tires' contact with the road, producing more grip on rougher road surfaces. The easiest way to reduce unsprung weight without otherwise compromising performance is to reduce the combined wheel/tire weight.

How can I be sure my new wheels will fit?
You have a few options to ensure proper fitment prior to purchasing. Ask the wheel retailer and ensure you are aware of their return policies. Get a general idea via the calculator found here:

http://toy4two.home.mindspring.com/offset.html

Will I need new lug nuts?
This is a question to ask the retailer. It can also be an additional expense to keep in mind during the time of purchase. There are three different types of lug nuts with the main difference being the seating surface shape of the lug nut to the wheel. Remember: always keep a set of OEM lug nuts
around for use with the spare, if using another type of lug nut.

If I change wheel size, will it effect my speedometer?
No, however, if you change the tire circumference, there will a speedometer variation. This website contains a nifty calculator that will assist you determining your new speedometer tolerances.

http://www.miata.net/garage/tirecalc.html

How important is wheel balancing?
Very. Wheel balancing is a procedure that improves tire performance by ensuring that the weight of the wheel is evenly distributed. Conversely, an out of balance wheel can accelerate tire and/or suspension component wear. Traditional tire balancing methods are cheap and effective methods to prevent the downsides of an out of balance wheel.

What is radial force balancing?
Advanced users, and those with wheel/tire vibrations not solved by normal balancing, might consider the additional cost of radial force balancing. Traditional balancing uses weights to offset minor variations in the weight of the wheel/tire combination around its circumference. In actual use, though, the wheel/tire combination is pressed against the road surface, and so variations in the "springiness" (or radial force) of the tire around its circumference can also cause problems. This radial force variation (RFV) does not necessarily have any connection to "high" or "low" spots in the tire/wheel, and so it cannot be corrected just by measuring runout on an unloaded wheel. The wheel/tire combination needs to be loaded (usually done by pressing a spinning cylinder against the wheel/tire combo, as in a dyno) to measure RFV and calculate weight placement to counteract it.

How hard is it to install wheels?
Allow around one hour for install time. This is one vehicle modification that is very simple and can be successfully accomplished by even the greenest shade tree mechanic.

[Accord GTR]

FYI, Bridgestone Tire Center at The Fort will probably have one of the first tire-mounting machines that can safely mount those very-hard sidewalled run-flat tires and ultra-low profile (30-series) tires.  

[Manga]

http://www.autoindustriya.com/yabbse/index.php?board=18;action=display;threadid=21126

Contirbuted by cka4. Very informative.

[soccerjoe5]

where can i have "radial force balancing" done to my car? i had normal balancing done and there is still some wiggling at speeds of 100kph+  

[aragon]

shifting from 13 to 16 inch mags!! how it will afeect my fuel millage!!! will it drastically increase my cars fuel consumption!! by what percent will it increase??
thanks!!

[soccerjoe5]

shifting from 13 to 16 inch mags!! how it will afeect my fuel millage!!! will it drastically increase my cars fuel consumption!! by what percent will it increase??
thanks!!

galit ka ata eh haha

[aragon]

galit ka ata eh haha

di naman!!

[simpsonseclaire]

question lang guys.

I have stock tire of 195/70/13, if i change it to 205/55/16 sobra na sa 3% allowed diameter difference.

Would this mean I have to get a thinner tire height? 205/50-45/16?

[R-A-Y]

question lang guys.

I have stock tire of 195/70/13, if i change it to 205/55/16 sobra na sa 3% allowed diameter difference.

Would this mean I have to get a thinner tire height? 205/50-45/16?

Yup I think 50 would put you in an acceptable range

[simpsonseclaire]

Thanks chief  R-A-Y!

[randyps3]

sir ang tires ko ay 195/60/15 pag pinalitan ko ng 205/45/17 na sa calculator eh .2 percent ang difference malaki po ba ang difference when it comes to performance ng kotse at fuel milage thanks

[swiftdevil]

http://www.carbibles.com/tyre_bible.html

very informative. 

[michaeljerome]

napulot ko sa net sana makatulong

rim width x 25.4 x 1.1 = minimum tire width
rim width x 25.4 x 1.3 = maximum tire width

example

7 inch rim x 25.4 x 1.1 = 195.58
7 inch rim x 25.4 x 1.3 = 231.14

so 195 to 225 ang optimal tire sizing

mga low profile below 50 stick to lower bound
sa mga 50 up kaya mas mataas

optimal daw to para mamaximize ang tire contact patch at ang side wall use + safe na din from the bead popping off compared pag sobrang stretched ang tire

pero kung porma hipari na! hehehe hth!

Agree