DengFu E56 Fat E-bike carbon frame fatigue test with horizontal forces shall be maintained as specified in ISO 4210 mountain bicycles standard.

Stage 1

Mount the frame in its normal attitude and secured at the rear dropouts so that it is not restrained in a rotary sense (i.e. preferably by the rear axle) as shown in Figure 1. Ensure that the axis of the front and rear axles are horizontally in line. Apply cycles of dynamic, horizontal forces of Stage 1 F2 in a forward direction and Stage 1 F3 in a rearward direction to the front fork dropouts for Stage 1 C1 cycles as shown in Table 1 and Figure 1, with the front fork constrained in vertical direction but free to move in a fore/aft direction under the applied forces.

Stage 2

With the frame and front fork assembly mounted as in the previous paragraph, Apply cycles of dynamic, horizontal forces of Stage 2 F2 in a forward direction and Stage 2 F3 in a rearward direction to the front fork dropouts for Stage 2 C1 cycles as shown in Table 1 and Figure 1, with the front fork constrained in vertical direction but free to move in a fore/aft direction under the applied forces.

DengFu E56 Fat E-bike carbon frame horizontal fatigue test report.

DengFu E56 Fat E-bike carbon frame horizontal fatigue test increase by 30% according to ISO 4210 standard requirements in the actual test.