DK New 2 grams super ultra light carbon fiber bicycle spokes
Ⅰ.Features:
-1) Diameter φ1.7mm, 3.2mm width carbon fiber bladed spokes for road or gravel bike wheels.
-2) 2 grams super light weight, high stiffness, high tensile strength, for high speed road races.
-3) 100% glueless mechanical lock technology, light weight Titanium nipples and threads.
-4) T head design, better fitting and stability for wheel building and riding.
-5) New developed anti-drop nipples, don't need any glue during wheel building.
-6) Anode black on the surface of metal parts at both ends, better and unified looking as spoke body.
-7)Combined the advantages of carbon fiber spokes and steel spokes, light weight, high tensile strength, better cruising and riding performance.
Ⅱ.Weight and Tensile Strength VS Stainless Steel Spokes:
| Spoke | Weight(260mm) | Tensile Failure Test |
| Carbon Spoke CS-T32 | 2.00 g | 4000N |
| Sapim CX-Ray | 4.36 g | 3000N |
| DT Aerolite | 4.28 g | 3000N |
Ⅲ.Spoke Drawing(Available Production Length: 241-290mm):
Ⅳ.Laboratory Test Items and Standards:
| Test Items | Test Conditions | Test Standard | Test Results | Judgement | |||||||||||||||
| 1.Spoke tension 120kg elongation test | 1. Fix the carbon spoke T-head on a special fixture; vertically to the test machine head. 2. The machine head rises at a speed of 8mm/min, and returns to the origin after pressurizing to 120kgf; 3. Test three carbon spokes of the same specification, apply a force of 120kgf, and record the load displacement. | 1.After the tension reaches 120kgf, the spoke elongation is ≤1% | T32-253MM-0.46% T32-258MM-0.45% T32-269MM-0.44% T32-270MM-0.45% T32-281MM-0.44% | OK | |||||||||||||||
| 2.Spoke tension 140kg elongation test | 1. Fix the carbon spoke T-head on a special fixture; vertically to the test machine head. 2. The machine head rises at a speed of 8mm/min, and returns to the origin after pressurizing to 140kgf; 3. Test three carbon spokes of the same specification, apply a force of 140kgf, and record the load displacement.。 | 1.After the tension reaches 140kgf, the spoke elongation is ≤1% | T32-253MM-0.52% T32-258MM-0.51% T32-269MM-0.49% T32-270MM-0.49% T32-281MM-0.49% | OK | |||||||||||||||
| 3.Spoke tension 160kg elongation test | 1. Fix the carbon spoke T-head on a special fixture; vertically to the test machine head. 2. The machine head rises at a speed of 8mm/min, and returns to the origin after pressurizing to 160kgf; 3. Test three carbon spokes of the same specification, apply a force of 160kgf, and record the load displacement.。 | 1.After the tension reaches 160kgf, the spoke elongation is ≤1% | T32-253MM-0.58% T32-258MM-0.57% T32-269MM-0.55% T32-270MM-0.55% T32-281MM-0.56% | OK | |||||||||||||||
| 4.Spoke tension 300kg elongation test | 1. Fix the carbon spoke T-head on a special fixture; vertically to the test machine head. 2. The machine head rises at a speed of 8mm/min, and returns to the origin after pressurizing to 300kgf; 3. Test three carbon spokes of the same specification, apply a force of 300kgf, and record the load displacement. | 1.After the tension reaches 160kgf, the spoke elongation is ≤2% | T32-253MM-1.05% T32-258MM-1.03% T32-269MM-0.99% T32-270MM-1.07% T32-281MM-1.03% | OK | |||||||||||||||
| 5.Ultimate Tensile Test | 1. Fix the carbon spoke T-head on a special fixture; vertically to the test machine head. 2. The machine head rises at a speed of 8mm/min, pressurize until the spokes break; 3. Test three carbon spokes of the same specification by applying force until they break, and record the maximum load breaking value | 1.maximum load breaking value of the spokes shall be ≥300kgf.. | T32-253MM-377kg T32-258MM-423kg T32-269MM-438kg T32-270MM-393kg T32-281MM-363kg | OK | |||||||||||||||
| 6.Spoke & Wheel Running Test | 1.Wheelset: Load 65kg, speed 25km/h, Tire Pressure 110psi. 2.Assemble the wheel, tire and inner tube and inflate the tire to 90% of the maximum inflation pressure. 3.The diameter of the drum should be in the range of 500mm to 1000mm, the width of the slats should be 50mm±2.5mm, thickness 10mm±0.25mm, and the edges should be half of their thickness with a 45°chamfer. 4.The circumferential spacing between the center lines of two consecutive slats shall not be less than 400mm. Rotate the drum to a linear speed of 25km/h (±10%) for a period of time to provide 750,000 impacts between the tire and the slats. | 1. For road running, the difference in front and rear wheel rim runout is ≤0.2mm, the average difference in carbon spoke tension is ±0.1mm, and the average difference in wheel rim outer width is ±0.1mm. | The actual test of 1300km (1.2 million impacts) exceeded the standard value by 1.6 times 1. The difference in runout of the front and rear rims during road running 0.1mm, 2. The average difference in tension is 0.06/0.03mm 3. The average difference in the outer width of the rim is 0.04mm. | OK | |||||||||||||||
Ⅴ.FAQ About CS-T32 Carbon Spoke:
-1) What Are the Differences Between CS-T32 and other carbon spokes like CS-005 or CS-006:
First, the dimension designs are difference, CS-T32 are with 3.2mm width, 0.75mm thickness and diameter 1.7mm, while others have bigger designs.
Second, materials are different, CS-T32 used carbon fiber and Titanium metal parts, while others used carbon fiber and stainless steel materials.
Third, the performances are different, CS-T32 reduce the weight and stiffness, which combined the advantages of steel and carbon spokes, better riding performances for gravel or cyclo-cross bikes.
-2) What are the suggested spoke tension for CS-T32:
120-130 kgf
-3) Can the carbon spoke cross to each other for a better laternal stiffness?
Yes, 2 corss, 3 cross are all available.
-4) Are any glue need to be attached to nipple area during wheel building?
No, we have new developed anti-drop nipple, don't need any glue or dot on the nipples.
-5)Can the CT-32 carbon spoke build with internal nipples for a better aerodynamic performance?
No, only external nipple holes are available, but can build without the tyre channel hole, so without tubeless tape, better air tightness and strength like below:
