Home Links Contact Imprint Sitemap German
Test results Test service Products Test methods Press News About us

 

 

Fatigue tests
Maximum load tests
Overload tests
Rigidity tests
TRI TEST
Tests e-bikes
Test order

 

 

Maximum load tests on safety relevant components


Here the requirements are: Tthere shall not be any relevant deformation or fracture when a load bearing component is loaded by  max. permitted load. These tests are called static tests too.
All EFBe Maximum load tests are performed in combination with the respective Overload test. The following components can be tested under maximum load:

 Frame
------------------------------------------------------

For the frame (without fork) two tests are available. 

  • Loading case Drop load (EFBe): The frame is statically supported as specified for the out-of-saddle test in the EFBe standard and in EN 14766 4.8.3. The force is applied to the bottom bracket vertically from above and absorbed at 15 degrees in the wheel axles. All forces act in the plane of the frame. Suspension frames are tested with a dummy spring element at 50 percent spring compression.
  • Loading case Pedal load single sided (EFBe): The frame is statically supported as specified for the out-of-saddle test in the EFBe standard and in EN 14766 4.8.3. The test differs from the standard in that the 170 mm right crank arm is aligned vertically downwards. A load is applied to the right side of the frame at pedal position. Suspension frames are tested with a dummy spring element at 50 percent spring compression. 

Both tests are part of the frame TRI TEST.

Frame/fork unit
------------------------------------------------------

Some tests should be performed on the complete frame/fork unit. Under maximum static load  it can be prooved wheather both parts are dimensioned sufficiently and which component will fail first. The EFBe Standard test for frame and front fork units simulates the maximum load, which occurs during a front wheel emergency stop.

  • Loading case Full braking (EFBe): The braking force present at the front wheel contact point is conducted into a dummy wheel. The reaction torque is conducted respectively via the front fork depending on the designated brake model. The concept is explained in more detail in a German-language article in RADMARKT 02/1995. EFBe recommendations for suitable requirements are based on the bicycle type, the maximum permissible weight and on the maximum permissible weight of the rear wheel carrier rack.
  • Loading case Falling frame (EN): The test is following EN 14764, EN 14766 or EN 14781.
  • Loading case Falling mass (EN): The test is following EN 14764, EN 14766 or EN 14781.

Fork
------------------------------------------------------

EN standards prescribe several Maximum load tests:

  • Loading case Tensile test (EN, suspension forks only)
  • Loading case Static bending (EN)
  • Loading case Static brake torque (EN, hub/disk-brakes only)

The maximum load requirements in the EN standards are particulary insufficient and, especially for city-/trekking bikes, can not securely avoid permanent deformation under service conditions.

  • Loading case Full braking (EFBe) The static maximum load test for frame-fork units is carried out separately just on the front fork. A fixed head tube angle of 70 degrees is taken as a basis. EFBe recommendations for suitable requirements are based on the bicycle type, the maximum permissible weight and on the maximum permissible weight of the rear wheel carrier rack. This test is part of the fork TRI TEST.

Handlebar/stem unit
---------------------------------------------
Handlebar and stem are tested as one unit.

  • Loading case Single sided driver load (EFBe): The test set up is corresponding to the fatigue test. Test load is applied single sided right and left. This test is part of the handlebar/stem TRI TEST.

EN Standards prescribe several tests:

  • Lateral bending stem (EN)
  • Lateral bending handlebar/stem (EN)
  • Forward bending (EN)
  • Torsional security (EN)

Test order form handlebar/stem

Seat post
---------------------------------------------

  • The test set up is corresponding to the fatigue test. This test is part of the seat post TRI TEST.

Test order form seat post

Crank set
---------------------------------------------

  • Out of saddle 45 degree (EN)
  • 30 degree (EN)
     
  • Loading case Out-of-saddle (EFBe): The test set up is corresponding to the fatigue test. This test is part of the crank set TRI TEST. 

Test order form seat post