Product Details:Material: Full carbon fiber frame + Ceramic Bearings + 7075 Aluminum Alloy Guide Wheel ( CNC )For bike type: Road bike and folding bike above 20"Size:148*88mmCompatible: 10 and 11 speedApplicable models:SD1: Apply to Shimano 4600 4700 5700 5800SD2: Apply to Shimano 6700 6770 6800 6870 9000 9070SD3: Apply to Shimano R7000SD4: Apply to Shimano 8000 8050 8070 9170 9150 9100SD5: Apply to Sram Red 10S, Red 11S, Rival 10S, Rival 11S, Force 10S, Force 11SWeight:SD1(76g),SD2(67g), SD3(80g), SD4(81g), SD4s(91g), SD5(72g), SD6(76g)Features:Lightweight:Carbon fiber derailleur puuleys ultralight for 0.13 lbsReduce Friction: Save 60% frictional resistance than 11TSmooth: Ceramic Bearings make it smooth and save more than 2.4 wattDurable: Full carbon fiber frame + Ceramic Bearings + 7075 Aluminum Alloy Guide Wheel ( CNC )Notes: Due to the light and screen setting difference, the item's color may be slightly different from the pictures.