250G Super Ultra-Light Carbon MTB XC/Gravel Rims

Doc Number

DK-TR-06022023

Serial Number

DK-M2230HL-29-SP

Weight

255g

Version

V1

Test Status

Sample Test

Test basis

ISO 4210/UCI/DK standard

Drawing

2.Rotate the rim for a circle, and record the maximum and minimum values of the dial indicator, the difference between the two is the flatness of the braking track;

3.The method of testing the roundness of the rim is the same as above.

1.Brake track flatness                   ≤0.3mm;

2.The roundness of the rim is      ≤0.3mm.

1.Brake track flatness is 0.2mm;

2.The roundness of the rim is 0.1mm.

1. Fix the rim on the special              fixture;

2. Apply force to the valve hole (rim 10kgf, wheel 20kgf), record its deformation and calculate the corresponding stiffness values;

3. Take the average values of the stiffness obtained from three different applied forces as the final rim stiffness value;

4. Measure once before and        after the wheel building;

5. The built wheel is a disc brake rear wheel, the hub axle size is 148mm, and the spoke tension on the drive side is 120±10kgf. The drive side is placed upward during the test.

1.The stiffness value before wheel building is ≥5N/mm.

2.The stiffness after wheel building (rear wheel drive side) ≥ 30N/mm

1.Before wheel  building: 5.4N/mm

2.After wheel building: 41.8N/mm

1. Fix the rim on the bottom plate of the universal testing machine, with the valve hole facing up;

2. Apply a force of 50kgf (490N) to the valve, record its deformation and calculate the corresponding stiffness value;

3. Take the average value of the stiffness obtained by three different applied forces as the final rim stiffness value.

1. Stiffness value (rim) ≥ 50N/mm

1. Drop hammer weight: 22.5kg;

2. Drop hammer shape: cylindrical, flat bottom;

3. Test without tires;

4. After the wheel set is fixed, raise the drop hammer to 48J (height 217mm), release the drop hammer, let it fall freely to the outer circle of the rim, and observe whether the rim is cracked or broken. If there is no crack or break, then increase the height successively and continue the test until crack or break appears.

1. 60J without any damage, it is determined that the test is passed.

2. The mountain bike rim test must be passed at least twice.

1. 48J, 60J, 70J are normal, 80J is broken;

2. 48J, 60J, 70J are normal, and 80J is broken.

OK

1.Fix the rim on the special fixture;

2. The rising speed of the machine head is 10mm/min;

3. Apply a force of 250kgf to the spoke holes, and test 7 different hole positions;

1.After the tensile force reaches 250kgf, there should be no cracks and bulges in the spoke holes.