Shopping on line can be easy, simple and save you lots of money. It can also take a lot of your time, frustrate you, and result in unwanted purchases. Now the same can be said for regular high street shopping, but with the vast opportunity presented by the Internet it will pay you to spend a few minutes reading this and understanding how to better optimize your Wheel Sizing shopping experience:

1. Compare - without doubt the biggest advantage that the Wheel Sizing offers shoppers today is the ability to compare thousands of Wheel Sizing at a time. This is a great thing, but not necessarily all the time! Too much can be daunting at times so take advantage of the great comparison sites and where possible let them do the hard work for you.

2. Research - if it has been said it will be on the internet. Ignorance is no longer a justifiable reason for buying the wrong thing. Take the time to research in detail everything that you could possible want to know about

3. Testimonials - don't know anybody that has bought a Wheel Sizing? Wrong! If the Wheel Sizing is good the internet will let you know. Use the Internet as a friend and get testimonials before you buy.

4. Questions - Got a question about Wheel Sizing then search the Forums, FAQ's, Blogs etc. Don't be afraid to ask .....

5. Reputation - Never heard of the company selling Wheel Sizing? Don't worry, no reason why you should know every company in the world, but you know someone that does! Use the internet to find out what people are saying about Wheel Sizing and build up a picture of their reputation for sales, returns, customer service, delivery etc.

6. Returns - still worried that even after all of the above your Wheel Sizing wont be what you want? Check out the returns policy. There is so much competition now that someone, somewhere is bound to offer the terms that you are comfortable with.

7. Feedback - happy with your Wheel Sizing then let people know, after all you are depending on others people input in your buying decision, so why not give a little back.

8. Security - check for the yellow padlock on the Wheel Sizing site before you buy, and the s after http:/ /i.e. https:// = a secure site

9. Contact - got a question about Wheel Sizing, or want to leave a comment then check out the sites contact page. Reputable companies have them and respond.

10. Payment - ready to pay for your Wheel Sizing, then use your credit card or PayPal! Be aware of companies that don't accept them, there may be genuine reasons but given the huge amount of choice you have when buying online there is no reason at all not to buy via credit card or PayPal.

In order to size a wheel for an automobile, an owner needs to know a few fundamental things:



Bolt pattern The bolt pattern is merely the number of bolts on the wheel. As the bolts will be evenly spaced, the number determines the bolt pattern. For example, most U.S. passenger cars have 5 bolts while compact models sometimes have only 4 and pick-up trucks can have as many as 6 or 8.

==Bolt circle==The bolt circle is the circle determined by the positions of the bolts; the center of every bolt lies on the circumference of the bolt circle.

The important measurement is the "pitch circle diameter" (PCD), usually expressed in millimeters, although inches are sometimes used. For a 4- or 6-bolt car, this measurement is merely the distance between the center of two diametrically opposite bolts. In the 4-bolt picture below, this would be the distance between holes #1 and #4. Some basic geometry is needed to find the center of a 5-bolt pattern: draw a line between any two neighboring bolts, and draw a line from the midpoint of this line to the opposite bolt. Repeat with a different set of three bolts, and the two long lines will cross in the center, thereby making the distance between this intersection and the center of a bolt the radius of the bolt circle.

The PCD can be calculated for any wheel from the number of bolts (n) and the measured center distance between two adjacent bolts (d) as; PCD = d / SIN(π/n).

A 1974 MG B is a 4/4.5" (4/114.3) car, meaning it is, again, a 4-bolt pattern with a 4.5" or 114.3 mm bolt circle.



The most common PCD values are 100 mm and 114.3 mm. This difference arises from the manufacturers' measurement convention - whether they are designing around metric values (100 mm) or imperial values (4.5 inches, i.e. 114.3 mm).

Lug nuts or bolts Another thing to consider when new wheels are purchased is proper lug nuts or bolts. They are usually either flat, tapered (generally at 90degrees), or ball seats, meaning the mounting surfaces are flat, tapered, or spherical respectively. For example, most Hondas have ball lug seats from the factory while most aftermarket wheels have a tapered lug design. If you buy aftermarket wheels for a Honda make sure you get the proper lug nuts for the wheel or the wheel will not be properly centered. Some manufacturers (e.g. Nissan) have used taper lug nuts for steel wheels and flat seated lug nuts for alloy wheels.

Some aftermarket wheels will only fit smaller lug nuts, or not allow an ordinary lug nut to be properly torqued down because a socket will not fit into the lug hole. Tuner lug nuts were created to solve the problem. Tuner lug nuts utilize a special key to allow removal and installation with standard lug wrench or socket. The design of tuner lug nuts can range from spline drive to multisided, and are sometimes lightweight for performance purposes. A variation is the "locking wheel nut", which is almost universally used for alloy wheels in the United Kingdom. One standard lug nut on each wheel is replaced with a nut which requires a special and unique key (typically a computer-designed, rounded star shape) to fit and remove the nut. This helps to discourage theft of wheels. However, universal removal tools are available which grip the head of the locking nut using a hardened left-hand thread. The success of these depends on whether there is room to use it in the lug hole, and whether the manufacturer has incorporated a free-spinning outer casing to the locking



Offset The offset, measured in millimeters, can be negative or positive, and is the distance from the mounting surface to the rim's true centerline. A positive offset means the wheel is front of the mounting surface, closer to the center of the fender; a negative offset means the wheel is away from the mounting surface and projecting from the fender. Offset affects the scrub radius of the steering and it is advisable to stay within the limits allowed by the vehicle manufacturer. However, if tires are fitted which are significantly wider than those specified by the manufacturer, a compromise may have to be adopted whereby a wheel with less offset is used to prevent the tire rubbing on the suspension.

Wheel size The wheel size is the diameter of the wheel, in inches, not counting the tire. Modern tires in North America have several other measurements associated with their size. A tire designated as a "225/70R14" denotes a tire with the following dimensions: width of tread: 225 mm; ratio of tire height to width: 70 percent; rim diameter: 14". Therefore a 185/70R14 has the same rim diameter and aspect ratio, but a smaller overall diameter and narrower tread face than the 225/70R14. For complete tire information and figures please see http://auto.howstuffworks.com/tire2.htm

Centerbore The centerbore of a wheel is the size of the hole in the back of the wheel that centers it over the mounting hub of the car. Factory wheels have a centerbore that matches exactly with the hub to reduce vibration by keeping the wheel centered. Wheels with the correct centerbore to the car they will be mounted on are known as hubcentric.Hubcentric wheels take the stress off the lug nuts, reducing the job of the lug nuts to holding the wheel to the car. Wheels that are not hubcentric are known as lugcentric, as the job of centering is done by the lug nuts assuming they are properly torqued down.Centerbore on aftermarket wheels must be greater than or equal to that of the car or the wheel will not physically mount to the car. Many aftermarket wheels come with hubcentric rings that lock into the back of the wheel to center it like a factory wheel, usually made of plastic.

X-factor Caliper Clearance (X-factor): The amount of clearance built into the wheel to allow for the vehicle’s brake rotor and caliper assembly.

See also

External links

In order to size a wheel for an automobile, an owner needs to know a few fundamental things:



Bolt pattern The bolt pattern is merely the number of bolts on the wheel. As the bolts will be evenly spaced, the number determines the bolt pattern. For example, most U.S. passenger cars have 5 bolts while compact models sometimes have only 4 and pick-up trucks can have as many as 6 or 8.

==Bolt circle==The bolt circle is the circle determined by the positions of the bolts; the center of every bolt lies on the circumference of the bolt circle.

The important measurement is the "pitch circle diameter" (PCD), usually expressed in millimeters, although inches are sometimes used. For a 4- or 6-bolt car, this measurement is merely the distance between the center of two diametrically opposite bolts. In the 4-bolt picture below, this would be the distance between holes #1 and #4. Some basic geometry is needed to find the center of a 5-bolt pattern: draw a line between any two neighboring bolts, and draw a line from the midpoint of this line to the opposite bolt. Repeat with a different set of three bolts, and the two long lines will cross in the center, thereby making the distance between this intersection and the center of a bolt the radius of the bolt circle.

The PCD can be calculated for any wheel from the number of bolts (n) and the measured center distance between two adjacent bolts (d) as; PCD = d / SIN(π/n).

A 1974 MG B is a 4/4.5" (4/114.3) car, meaning it is, again, a 4-bolt pattern with a 4.5" or 114.3 mm bolt circle.



The most common PCD values are 100 mm and 114.3 mm. This difference arises from the manufacturers' measurement convention - whether they are designing around metric values (100 mm) or imperial values (4.5 inches, i.e. 114.3 mm).

Lug nuts or bolts Another thing to consider when new wheels are purchased is proper lug nuts or bolts. They are usually either flat, tapered (generally at 90degrees), or ball seats, meaning the mounting surfaces are flat, tapered, or spherical respectively. For example, most Hondas have ball lug seats from the factory while most aftermarket wheels have a tapered lug design. If you buy aftermarket wheels for a Honda make sure you get the proper lug nuts for the wheel or the wheel will not be properly centered. Some manufacturers (e.g. Nissan) have used taper lug nuts for steel wheels and flat seated lug nuts for alloy wheels.

Some aftermarket wheels will only fit smaller lug nuts, or not allow an ordinary lug nut to be properly torqued down because a socket will not fit into the lug hole. Tuner lug nuts were created to solve the problem. Tuner lug nuts utilize a special key to allow removal and installation with standard lug wrench or socket. The design of tuner lug nuts can range from spline drive to multisided, and are sometimes lightweight for performance purposes. A variation is the "locking wheel nut", which is almost universally used for alloy wheels in the United Kingdom. One standard lug nut on each wheel is replaced with a nut which requires a special and unique key (typically a computer-designed, rounded star shape) to fit and remove the nut. This helps to discourage theft of wheels. However, universal removal tools are available which grip the head of the locking nut using a hardened left-hand thread. The success of these depends on whether there is room to use it in the lug hole, and whether the manufacturer has incorporated a free-spinning outer casing to the locking



Offset The offset, measured in millimeters, can be negative or positive, and is the distance from the mounting surface to the rim's true centerline. A positive offset means the wheel is front of the mounting surface, closer to the center of the fender; a negative offset means the wheel is away from the mounting surface and projecting from the fender. Offset affects the scrub radius of the steering and it is advisable to stay within the limits allowed by the vehicle manufacturer. However, if tires are fitted which are significantly wider than those specified by the manufacturer, a compromise may have to be adopted whereby a wheel with less offset is used to prevent the tire rubbing on the suspension.

Wheel size The wheel size is the diameter of the wheel, in inches, not counting the tire. Modern tires in North America have several other measurements associated with their size. A tire designated as a "225/70R14" denotes a tire with the following dimensions: width of tread: 225 mm; ratio of tire height to width: 70 percent; rim diameter: 14". Therefore a 185/70R14 has the same rim diameter and aspect ratio, but a smaller overall diameter and narrower tread face than the 225/70R14. For complete tire information and figures please see http://auto.howstuffworks.com/tire2.htm

Centerbore The centerbore of a wheel is the size of the hole in the back of the wheel that centers it over the mounting hub of the car. Factory wheels have a centerbore that matches exactly with the hub to reduce vibration by keeping the wheel centered. Wheels with the correct centerbore to the car they will be mounted on are known as hubcentric.Hubcentric wheels take the stress off the lug nuts, reducing the job of the lug nuts to holding the wheel to the car. Wheels that are not hubcentric are known as lugcentric, as the job of centering is done by the lug nuts assuming they are properly torqued down.Centerbore on aftermarket wheels must be greater than or equal to that of the car or the wheel will not physically mount to the car. Many aftermarket wheels come with hubcentric rings that lock into the back of the wheel to center it like a factory wheel, usually made of plastic.

X-factor Caliper Clearance (X-factor): The amount of clearance built into the wheel to allow for the vehicle’s brake rotor and caliper assembly.

See also

External links



Wheel sizing - Wikipedia, the free encyclopedia
In order to size a wheel for an automobile, an owner needs to know a few fundamental things: The bolt pattern; The diameter of the bolt circle; The offset; The size of the wheel ...

Bike Works NYC - Wheel Sizing
This page is about the shop. ... Bike Works NYC Wheel & Gear Size Tire and Rim Sizes Chart shows most tires and rims,

Wheel - Wikipedia, the free encyclopedia
A wheel is a circular device that is capable of rotating on its axis, facilitating ... Simple machine; Square wheel; Steering wheel; Tire; Tweel; Wagon-wheel effect; Wheel and axle; Wheel sizing ...

Wheelskins Sizing
Established in 1977, Wheelskins has manufactured only the finest in genuine leather interior accessories, with strict emphasis on quality, value and profitability. Our products are ...

Tire Size Calculator - tire & wheel plus sizing
1010tires.com Tire Size calculator use our tire calculator to compare tire sizes based on tire diameter, radius, sidewall height, circumference, revs per mile and speedometer ...

What happens if I change my wheel size?
Disadvantages - In the majority of situations, tyre inches are lighter than wheel inches. Plus-sizing can make your overall wheel/tyre package heavier.

Sema.Org
SEMA eNews, Vol. 8, No. 27 - July 6, 2005. GUIDE TO WHEEL AND TIRE PLUS-SIZING . SEMA has the 2005 Ultimate Wheel and Tire Plus-Sizing Guide available to members for the discounted ...

1010tires.com Tire & Wheel Tech
USD ... Bolt Patterns Plus Sizing Wheel Care Centerbore Torque Alloy vs Steel Wheel Construction

CBN Grinding Wheel Inventory Sizing through Non-Shortsighted Flexible ...
CBN Grinding Wheel Inventory Sizing through Non-Shortsighted Flexible Tool Management Strategies

Wheel Sizing

 

Wheel Sizing



 
Copyright © 2008 Hintcenter.com - All rights reserved.
Home | Terms of Use | Privacy Policy
All Trademarks belong to their repective owners. Many aspects of this page are used under
commercial commons license from Yahoo!