ASTM F2663-07
(Test Method)Standard Test Method for Bead Unseating of Tubeless Tires for Motor Vehicles with GVWR of 4536 kg (10 000 lb) or Less
Standard Test Method for Bead Unseating of Tubeless Tires for Motor Vehicles with GVWR of 4536 kg (10 000 lb) or Less
SIGNIFICANCE AND USE
This test method establishes a standard procedure for the test and provides data that can be related to the force required to unseat the bead of a tire inflated with a specified pressure from the rim. This test method does not establish performance limits or tolerances for tire specifications.
SCOPE
1.1 This test method covers the static non-rolling laboratory method of determination of a tubeless tires resistance to bead unseating. The test requires the use of a standardized fixture and load machine. The test is conducted using a defined test pressure and method of determining the resultant force to unseat the tire from the rim.
1.2 This test method is applicable for all passenger, light truck, and temporary spare tires used on motor vehicles with 4536 kg (10 000 lb) Gross Vehicle Weight Rating (GVWR) or less.
1.3 The values stated in SI units are to be regarded as the standard. The values given in parentheses are for information only.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
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Designation: F 2663 – 07
Standard Test Method for
Bead Unseating of Tubeless Tires for Motor Vehicles with
GVWR of 4536 kg (10 000 lb) or Less
This standard is issued under the fixed designation F 2663; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope 3.1.3 elements, n—an isolated (totally bounded by void)
projection. F 538
1.1 This test method covers the static non-rolling laboratory
3.1.4 manufacturer, of a tire, n—name of a company or
method of determination of a tubeless tire’s resistance to bead
wholly owned subsidiary making the tire. F 538
unseating. The test requires the use of a standardized fixture
3.1.5 measuring rim, n—any“rim”withawidthasspecified
and load machine. The test is conducted using a defined test
for the design or measuring rim for a particular tire size
pressure and method of determining the resultant force to
designation, and with the “bead” seat and flange dimensions in
unseat the tire from the rim.
accordance with publications of tire and rim standards organi-
1.2 This test method is applicable for all passenger, light
zations current at the time of manufacture.
truck, and temporary spare tires used on motor vehicles with
3.1.6 outside diameter, n—maximum diameter of the tire
4536 kg (10 000 lb) Gross Vehicle Weight Rating (GVWR) or
when it is mounted and inflated. F 538
less.
3.1.7 overall width, n—maximumcross-sectionalwidthofa
1.3 The values stated in SI units are to be regarded as the
tire, including protective or decorative ribs. F 538
standard. The values given in parentheses are for information
3.1.8 rim, n—specially shaped circular periphery to which a
only.
tire may be mounted with appropriate bead fitment. F 538
1.4 This standard does not purport to address all of the
3.1.9 rim, test, n—rim having the configuration and dimen-
safety concerns, if any, associated with its use. It is the
sions suitable for use with a test tire in accordance with
responsibility of the user of this standard to establish appro-
publications of a tire and rim standards organization current at
priate safety and health practices and determine the applica-
the time of tire manufacture. F 538
bility of regulatory limitations prior to use.
3.1.10 sidewall, of a tire, n—portion of a tire between the
2. Referenced Documents
tread and the bead. F 538
3.1.11 specified design section width, n—width specified in
2.1 ASTM Standards:
the publications of tire and rim standards organizations current
F 538 Terminology Relating to the Characteristics and Per-
at the time of manufacture for a new tire of that size
formance of Tires
designation and type when inflated on its “measuring rim.”
F 1502 Test Method for Static Measurements on Tires for
3.1.12 tire, pneumatic, n—hollow tire that becomes load-
Passenger Cars, Light Trucks, and Medium Duty Vehicles
bearing upon inflation with air, or other gas, to a pressure
3. Terminology
above atmospheric. F 538
3.1.13 tread, of a tire, n—part of the tire that comes in
3.1 Definitions:
contact with the ground. F 538
3.1.1 bead, of a tire, n—part of a tire that comes in contact
3.1.14 unseating, v—the dislodgment of the bead area of a
with the rim and is shaped to secure the tire to the rim.
tire from the portion of the rim designed to hold the bead in
F 538
place resulting in loss of inflation pressure.
3.1.2 bead unseating block, n—machined block of cast
aluminum (also known as “shoe”) used on the bead unseating
4. Summary of Test Method
fixture to press against the tire sidewall.
4.1 This test method measures the force needed to unseat a
tire from a clean, dry, painted test rim. The force is applied
This test method is under the jurisdiction of ASTM Committee F09 on Tires
throughaspecifiedbeadunseatingblockandpivotingloadarm
and is the direct responsibility of Subcommittee F09.30 on Laboratory (Non-
set substantially parallel to the tire rim assembly at the start of
Vehicular) Testing.
the test.The force is measured at a specific point of the fixture.
Current edition approved June 1, 2007. Published July 2007.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or The point to be contacted on the tire sidewall is determined
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
within this test method.
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
F 2663 – 07
5. Significance and Use Technology (NIST) or secondary standards traceable to NIST
or applicable national standards. The frequency of calibration
5.1 Thistestmethodestablishesastandardprocedureforthe
shall be as often as necessary to ensure that all functions are
test and provides data that can be related to the force required
within tolerances listed in Section 7.
to unseat the bead of a tire inflated with a specified pressure
from the rim. This test method does not establish performance
10. Conditioning
limits or tolerances for tire specifications.
10.1 The ambient temperature for tire conditioning and in
6. Apparatus the test area shall be any known temperature within the range
of 24 6 8°C (75 6 15°F) (see Test Method F 1502).
6.1 A fixture to hold the tire-rim assembly as shown in
10.2 Tire must be aged a minimum of 24 h after curing.
Annex A1 or equivalent.
6.2 Testing machine which incorporates a block traveling at
11. Procedure
50.8 6 1.58 mm/min (2.0 6 0.0625 in./min) which can exert
a force on the fixture at the spherical attachment point (in line 11.1 The tire must be at room temperature before mounting.
Wash the tire, dry the bead area and mount the tire on a dry,
with the centerline of the bead unseating block) or equivalent.
6.3 Aforce indicating device that shall have an accuracy of clean, corrosion free test rim without lubrication or adhesives.
11.2 Inflate the tire to, but do not exceed, the maximum
61% of the indicated force in the operating range and shall
inflation pressure indicated on the tire sidewall, to seat the
reflect an instantaneous change in force from zero to full scale
bead. Verify proper bead seating.
in no more than 3.0 s.
11.3 Immediately reduce the pressure to the specified pres-
6.4 Means for calibration of the testing machine for applied
sure based on the requirements of the bead unseat standard or
load and rate of application speed are necessary.
Table 1 or Table 2.
6.5 Means for mounting the tire on a test rim and mounting
the test assembly on the testing machine is necessary.
6.6 Test rims.
TABLE 1 Passenger Car and Light Truck (LT) Tire Inflation
6.7 Pressure gauge, capable of measuring the pressure
Pressure
within 63.5 kPa (0.5 psi).
Test Inflation Maximum Inflation
Tire Load Identification
psi (kPa) psi (kPa)
7. Sampling
Alphanumeric type tires
7.1 A sample is one or more tires taken from a lot as Load range B 24 (165) 32 (220)
Load range C 28 (195) 36 (250)
directed in any applicable specification, or as taken from a
Load range D 32 (220) 40 (275)
shipping unit, or as agreed upon between the purchaser and the
seller. “Passenger” type tires
Standard load 26 (180) 35 (240)
7.2 Record the manufacturer’s identification, brand name,
26 (180) (250)
tire identification number, tire outside diameter, rim diameter
Extra load 32 (220) 41 (280)
32 (220) (290)
and width, size, load range, and type of tire. Visually inspect
300 kPa 26 (180) 44 (300)
the tire completely for excessive mold lubricant and any
340 kPa 32 (220) 50 (340)
obvious faults or conditions that could affect the test.
350 kPa 26 (180) 51 (350)
“LT” and “C” type tires 35 (240) 35 (240)
8. Preparation of Apparatus
50 (350)
8.1 Check fixture for bent arm, loose or binding pivot and
65 (450)
80 (550)
flat seating of rim on the support flange.
8.2 On certain equipment designs, check alignment of
“T” type tires
spherical adaptor and ram from load machine. Temporary use 52 (360) 60 (420)
9.
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