ASTM F2899-11(2016)

Standard Specification for Condition 1 Bicycle Forks

ABSTRACT
This specification provides testing requirements for qualifying designs using production forks intended for use in Condition 1 per Classification F2043. It covers the compression load test, bending load test, impact resistance test, and fatigue plus impact test for bicycle forks.
SCOPE
1.1 This standard establishes testing requirements for qualifying designs using production forks intended for use in Condition 1 per Classification F2043.

General Information

• Status: Published
• Publication Date: 30-Sep-2016
• ICS: 43.150 - Cycles
• Technical Committee: F08 - Sports Equipment, Playing Surfaces, and Facilities
• Drafting Committee: F08.10 - Bicycles

Relations

• Replaces: ASTM F2899-11 - Standard Specification for Condition 1 Bicycle Forks
• Effective Date: 01-Oct-2016
• Refers: ASTM F2043-13(2018) - Standard Classification for Bicycle Usage
• Effective Date: 01-Nov-2018
• Refers: ASTM F2273-11(2016) - Standard Test Methods for Bicycle Forks
• Effective Date: 01-Oct-2016
• Refers: ASTM F2043-13 - Standard Classification for Bicycle Usage
• Effective Date: 01-Nov-2013
• Refers: ASTM F2273-11 - Standard Test Methods for Bicycle Forks
• Effective Date: 01-May-2011
• Refers: ASTM F2043-09 - Standard Classification for Bicycle Usage
• Effective Date: 01-Jan-2009
• Refers: ASTM F2273-03 - Standard Test Methods for Bicycle Forks
• Effective Date: 10-Jul-2003
• Refers: ASTM F2043-00 - Standard Classification for Bicycle Usage
• Effective Date: 10-Jul-2000

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: F2899 −11 (Reapproved 2016) An American National Standard
Standard Specification for
Condition 1 Bicycle Forks
This standard is issued under the fixed designation F2899; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope intended for use by the manufacturer to the nearest surface of
the crown shall be at least 3 mm.
1.1 This standard establishes testing requirements for quali-
5.1.2 Bending Load Test:
fying designs using production forks intended for use in
5.1.2.1 The fork shall withstand a maximum bending load
Condition 1 per Classification F2043.
of 1200 N (100 N initial load plus an additional 1100 N).
5.1.2.2 The permanent deflection of a rigid fork shall not
2. Referenced Documents
exceed5mmandthepermanentdeflectionofasuspensionfork
2.1 ASTM Standards:
shall not exceed 10 mm.
F2043 Classification for Bicycle Usage
5.1.3 Impact Resistance Test:
F2273 Test Methods for Bicycle Forks
5.1.3.1 For each fork, permanent deflection shall be less
than 45 mm following impact of a 22.5 kg mass dropped from
3. Classification
a height such that the velocity at impact shall be at least 3.54
3.1 Condition 1 per Classification F2043.
m/s.
NOTE 1—In a frictionless system, this velocity would be achieved for a
4. Sampling and Test Specimens
drop height of 640 mm.
4.1 Selection and Preparation of Specimens:
5.1.3.2 For Condition 1 forks, a second drop test and steerer
4.1.1 Three forks shall be randomly selected from the first
torsional assessment are not required in this impact resistance
production lot for the fatigue plus impact test per this test
test.
method.
5.1.4 Fatigue Plus Impact Test:
4.1.2 Oneforkshallberandomlyselectedfortheimpacttest
5.1.4.1 Each fork shall withstand a fully reversed sinusoidal
per this test method.
load of 620 N for at least 100 000 cycles without structural
4.1.3 One fork shall be randomly selected for both the
cracks or fractures and without exceeding the displacement
compression and bending tests per this test method.
limits described in Test Methods F2273.
5.1.4.2 If the fork withstands 100 000 cycles, it shall be
5. Performance Requirements
subjected to an impact of a 22.5 kg mass dropped from a height
5.1 Bicycle forks intended by the manufacturer to be used
such that the velocity at impact shall be at least 2.66 m/s.
according to Condition 1 shall be tested per Test Methods
NOTE 2—In a frictionless system, this velocity would be achieved for a
F2273.
height of 360 mm.
5.1.1 Compression Load Test (Suspension Forks):
5.1.4.3 Foll
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