1. Material: aluminum alloy + carbon fiber
2. Aluminum alloy interface, CNC machining, anodic oxidation treatment, sturdy and durable
3. Aluminum alloy guide wheel, aluminum alloy CNC machining, anodic oxidation treatment, built-in ceramic bearing is more wet and smooth
4. High-strength screws, screws to fix the guide wheel, not loose, not shake, safer, more stable
5. Carbon fiber frame, the guide wheel frame is made of lightweight carbon fiber material, higher strength, more stable, light weight, no burden on riding.
6. Application: SD1 for Shimano 4600/4700/5700/5800; SD2 for Shimano 6700/6770/6800/6870/9000/9070; SD3 for Shimano R7000; SD4 for Shimano 8000/8050/8070/9170/9150/9150/9150/9150/9150/9150/9150/9150/9150/9150/9100 9170/9150/9100; SD5 for SRAM RED10s/RED11s/RIVAL10s/RIVAL11s/FORCE10s/FORCE11s; SD6 for SRAM eTap
7. Weight: SD1 about 83g, SD2 about 72g, SD3 about 84g, SD4 about 85g, SD5 about 77g, SD6 about 82g
8. Size: SD1 about 14.8x8.7x4.3cm, SD2 about 14.8x8.7x3.2cm, SD3 about 14.1x8.7x4.2cm, SD4 about 14.1x8.5x4.1cm, SD5 about 14.7x8.5x4.2cm, SD6 about 14.9x8.5x4cm