Post by zulharon on Dec 4, 2008 12:16:26 GMT 8
website enkei....
Offset
The offset indicates the distance from the center of the rim to the attaching disk part (unit:m/m). As seen in the attached drawing, the offset is indicated by "+" when the fitting surface extends beyond the central line of the rim and "-" when it is falls within. Caution is required to prevent the tire from coming into contact with the fender of the vehicle or the brake caliper if the offsets are very different.
PCD
The number of bolts used to install a wheel varies from 4 to 6 depending on the vehicle model (except for some vehicle type), thus the wheel to be installed should also possess the same number of hub bolt holes. P.C.D. stands for pitch circle diameter, and indicates the diameter of the circle in mm connecting the center of each hub bolt. Since the P.C.D. also varies according to the vehicle model, make sure a suitable one is selected.
Clearance
Fender clearance indicates the marginal space between the tire and the fender or body of the vehicle. Inner clearance indicates the distance between the tire and wheel and the body part which is positioned closest to the tire and wheel. Dimensions for both right and left clearance should be measured on a level surface, and the smaller value is then considered as the inner clearance.
Tyre Size
1-Tire width (mm or inch)
2-Aspect ratio
3-Radial construction
4-Rim diameter
5-Load index
6-Speed symbol
7-Tire outer diameter (inch)
8-Ply rating
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Safety Standard
Japan Light Alloy Wheel (JWL) Standard for Passenger Cars. The Ministry of Land, Infrastructure, and Transport requires that aluminum wheels for passenger cars (with 3, 5, and 7-number plates) sold in Japan bear the JWL mark. The JWL mark can be displayed on wheels that have passed the standard through a self-certification system.
Similarly, the ministry requires aluminum wheels for trucks and buses (with 1 and 4-number plates) to bear the JWL-T mark. Even if a vehicle is classified as a passenger car (with 3, 5, or 7-number plates), if it comes with LT tires as standard equipment due to its GVW (gross vehicle weight), it must use aluminum wheels bearing the JWL-T mark.
A third-party entity called the Vehicle Inspection Association verifies whether a product meets the requirements prescribed by the JWL or JWL-T standard. This association permits a product to bear a VIA mark if it passes rigorous quality and strength verification tests conducted in accordance with the JWL or JWL-T standard.
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Ensuring the Safe and Proper Use of Aluminum Wheels
(Read Carefully)
The aluminum wheels listed in the catalog are in compliance with the Japan Light Alloy Wheel (JWL) or Japan Light Alloy Wheel Truck & Bus (JWL-T) standard, and have passed the tests conducted by the Vehicle Inspection Association (VIA). To ensure the proper safety and performance of the wheels, follow the instructions indicated below. Also, before using the wheels, be sure to read Ensuring the Safe and Proper Use of Aluminum Wheels, which is included with the aluminum wheels. For any additional information that you may require, contact the dealer where you purchased the products.
Selecting the Wheels
Make sure the size, number of holes, PCD (pitch circle diameter), offset, and mounting surface shape of the wheels are compatible with the vehicle on which the wheels are to be mounted. The wheels cannot be mounted if any of the foregoing attributes are not compatible.
Mounting the Wheels
Danger
A wheel comes with a 60-degree taper, spherical, or flat lug nut seats. Therefore, verify the thread diameter and pitch of the hub on the vehicle, and use nuts or bolts that match the shape of the seats (or use dedicated nuts or bolts as instructed). If the shapes do not match, it will not be possible to properly tighten the nuts or bolts, which could cause them to become loose and detached while driving.
Warning
Use only the supplied valves. Using other valves with unmatched sizes or shapes could cause air to leak through the valve hole.
When the valve core must be replaced, be sure to use a new one because an old valve core with a deteriorated seal could cause air leakage.
Use the short type valve core (model number JIS B type 9000). The long type, which does not match in size and shape, will cause air leakage.
Do not tighten the nuts or bolts with an impact wrench. Over-tightening in this manner could damage the nuts and bolts, or could cause the
wheel to be mounted unevenly, which results in vibrations. If an impact wrench must be used due to unavoidable circumstances, first tighten the nuts or bolts to a low torque; then, tighten them to the specified torque.
After Mounting the Wheels
Warning
Never mount a wheel in a way that causes the tire or wheel to protrude from the fender, which is prohibited by law.
Warning
After mounting the wheels, fully turn the steering wheel to the right and left to make sure the wheels do not come in contact with the vehicle body.
Caution
After mounting the tire to the wheel, immerse it in a water tank to make sure there is no air leakage in the area where the tire mates with the rim, or in the area around the valve. If there is any air leakage, dismount the tire and remount it properly.
Caution
The lug nuts are susceptible to loosening following the installation or relocation of the wheels. Therefore, retighten them to the recommended torque after driving approximately 100 kilometers.
Driving
Warning
If an abnormal vibration or sound is sensed during driving, immediately stop the vehicle in a safe location and check the lug nuts for looseness, the wheels for deformation, and the conditions of the tires.
Do not drive over curbs or dips in the road, as it could damage the rim flanges.
Daily Care
Aluminum alloy wheels are susceptible to corrosion when they are exposed to salt or mud. Therefore, wash them with water after driving the vehicle on the beach or on a snowy or unimproved road. Before using a commercial wheel cleaner to wash the wheels, be sure to read its operation manual.
Using car wash equipment could scratch the wheels. Therefore, it is best to wash them by hand. When doing so, be careful with sharp edges, which could be hazardous to your hands.
For storing the wheels, wash them thoroughly and store them in an area that is not exposed to direct sunlight or moisture.
Danger! Do not perform the following:
Danger
Never disassemble the rim and the disc of a two- or three-piece wheel, which is dangerous. Disassembling such a wheel will create an imbalance in the tightening force of the bolts, which reduces the strength of the wheel and causes air leakage and vibration. In the event a wheel becomes loose, make sure to contact your dealer.
Danger
Never attempt to repair or rework a wheel that is deformed or cracked. This is dangerous because the strength of the wheel could decrease due to invisible deformations or the thermal effects of welding.
Offset
The offset indicates the distance from the center of the rim to the attaching disk part (unit:m/m). As seen in the attached drawing, the offset is indicated by "+" when the fitting surface extends beyond the central line of the rim and "-" when it is falls within. Caution is required to prevent the tire from coming into contact with the fender of the vehicle or the brake caliper if the offsets are very different.
PCD
The number of bolts used to install a wheel varies from 4 to 6 depending on the vehicle model (except for some vehicle type), thus the wheel to be installed should also possess the same number of hub bolt holes. P.C.D. stands for pitch circle diameter, and indicates the diameter of the circle in mm connecting the center of each hub bolt. Since the P.C.D. also varies according to the vehicle model, make sure a suitable one is selected.
Clearance
Fender clearance indicates the marginal space between the tire and the fender or body of the vehicle. Inner clearance indicates the distance between the tire and wheel and the body part which is positioned closest to the tire and wheel. Dimensions for both right and left clearance should be measured on a level surface, and the smaller value is then considered as the inner clearance.
Tyre Size
1-Tire width (mm or inch)
2-Aspect ratio
3-Radial construction
4-Rim diameter
5-Load index
6-Speed symbol
7-Tire outer diameter (inch)
8-Ply rating
--------------------------------------------------------------------
Safety Standard
Japan Light Alloy Wheel (JWL) Standard for Passenger Cars. The Ministry of Land, Infrastructure, and Transport requires that aluminum wheels for passenger cars (with 3, 5, and 7-number plates) sold in Japan bear the JWL mark. The JWL mark can be displayed on wheels that have passed the standard through a self-certification system.
Similarly, the ministry requires aluminum wheels for trucks and buses (with 1 and 4-number plates) to bear the JWL-T mark. Even if a vehicle is classified as a passenger car (with 3, 5, or 7-number plates), if it comes with LT tires as standard equipment due to its GVW (gross vehicle weight), it must use aluminum wheels bearing the JWL-T mark.
A third-party entity called the Vehicle Inspection Association verifies whether a product meets the requirements prescribed by the JWL or JWL-T standard. This association permits a product to bear a VIA mark if it passes rigorous quality and strength verification tests conducted in accordance with the JWL or JWL-T standard.
--------------------------------------------------------------------
Ensuring the Safe and Proper Use of Aluminum Wheels
(Read Carefully)
The aluminum wheels listed in the catalog are in compliance with the Japan Light Alloy Wheel (JWL) or Japan Light Alloy Wheel Truck & Bus (JWL-T) standard, and have passed the tests conducted by the Vehicle Inspection Association (VIA). To ensure the proper safety and performance of the wheels, follow the instructions indicated below. Also, before using the wheels, be sure to read Ensuring the Safe and Proper Use of Aluminum Wheels, which is included with the aluminum wheels. For any additional information that you may require, contact the dealer where you purchased the products.
Selecting the Wheels
Make sure the size, number of holes, PCD (pitch circle diameter), offset, and mounting surface shape of the wheels are compatible with the vehicle on which the wheels are to be mounted. The wheels cannot be mounted if any of the foregoing attributes are not compatible.
Mounting the Wheels
Danger
A wheel comes with a 60-degree taper, spherical, or flat lug nut seats. Therefore, verify the thread diameter and pitch of the hub on the vehicle, and use nuts or bolts that match the shape of the seats (or use dedicated nuts or bolts as instructed). If the shapes do not match, it will not be possible to properly tighten the nuts or bolts, which could cause them to become loose and detached while driving.
Warning
Use only the supplied valves. Using other valves with unmatched sizes or shapes could cause air to leak through the valve hole.
When the valve core must be replaced, be sure to use a new one because an old valve core with a deteriorated seal could cause air leakage.
Use the short type valve core (model number JIS B type 9000). The long type, which does not match in size and shape, will cause air leakage.
Do not tighten the nuts or bolts with an impact wrench. Over-tightening in this manner could damage the nuts and bolts, or could cause the
wheel to be mounted unevenly, which results in vibrations. If an impact wrench must be used due to unavoidable circumstances, first tighten the nuts or bolts to a low torque; then, tighten them to the specified torque.
After Mounting the Wheels
Warning
Never mount a wheel in a way that causes the tire or wheel to protrude from the fender, which is prohibited by law.
Warning
After mounting the wheels, fully turn the steering wheel to the right and left to make sure the wheels do not come in contact with the vehicle body.
Caution
After mounting the tire to the wheel, immerse it in a water tank to make sure there is no air leakage in the area where the tire mates with the rim, or in the area around the valve. If there is any air leakage, dismount the tire and remount it properly.
Caution
The lug nuts are susceptible to loosening following the installation or relocation of the wheels. Therefore, retighten them to the recommended torque after driving approximately 100 kilometers.
Driving
Warning
If an abnormal vibration or sound is sensed during driving, immediately stop the vehicle in a safe location and check the lug nuts for looseness, the wheels for deformation, and the conditions of the tires.
Do not drive over curbs or dips in the road, as it could damage the rim flanges.
Daily Care
Aluminum alloy wheels are susceptible to corrosion when they are exposed to salt or mud. Therefore, wash them with water after driving the vehicle on the beach or on a snowy or unimproved road. Before using a commercial wheel cleaner to wash the wheels, be sure to read its operation manual.
Using car wash equipment could scratch the wheels. Therefore, it is best to wash them by hand. When doing so, be careful with sharp edges, which could be hazardous to your hands.
For storing the wheels, wash them thoroughly and store them in an area that is not exposed to direct sunlight or moisture.
Danger! Do not perform the following:
Danger
Never disassemble the rim and the disc of a two- or three-piece wheel, which is dangerous. Disassembling such a wheel will create an imbalance in the tightening force of the bolts, which reduces the strength of the wheel and causes air leakage and vibration. In the event a wheel becomes loose, make sure to contact your dealer.
Danger
Never attempt to repair or rework a wheel that is deformed or cracked. This is dangerous because the strength of the wheel could decrease due to invisible deformations or the thermal effects of welding.
