จาน Shimano 105 FC-R7100 2ชั้น มีกล่อง

จาน Shimano 105 FC-R7100 2ชั้น มีกล่อง มีขนาด 50x34T สีดำ ขาจานยาว 170-172.5 SHIMANO 105 HOLLOWTECH II Crankset 2x12-speed FC-R7100 An attractive aluminum crank with hollow arms for lightweight, rigidity, and durability The newly designed crank arms offer an optimized balance between lightweight and efficiency. The crank, formed with hollow aluminum technology, is anodized with a beautiful gloss black anodized finish, giving it a luxurious look. The resin ribs on the back of the chainrings are SHIMANO 105's unique structural design that achieves both thorough weight reduction and crisp shifting performance. FEATURES Optimal balance of stiffness, strength, weight and rotational performance HOLLOWTECH II structure cuts weight yet maintains strength for better power transfer Crank arm length: 160, 165, 170, 172.5, 175 mm Gear combination: 50-34T, 52-36T Q-factor: 148 mm PRODUCT SPECIFICATIONS MODEL NO FC-R7100 SERIES SHIMANO 105 R7100 Di2 Series Color Black Average weight 754 (50-34T) Rear speeds 12 Compatible chain HG 12-speed Chain line (mm) 44.5 P.C.D. (mm) 110 Spider/gear arms 4 Chainring combination 50-34T, 52-36T Q-factor (mm) 148 Crank arm length (mm)|160 Crank arm length (mm)|165 Crank arm length (mm)|170 Crank arm length (mm)|172.5 Crank arm length (mm)|175 Optional chain guard|Without chain/bash guard HOLLOWTECH II HOLLOWTECH crank arm Compatible bottom bracket type|Outboard Recommended bottom bracket|Threaded (normal) SM-BBR60 Recommended bottom bracket|Press-Fit SM-BB72-41B Threaded bottom bracket shell width (mm)|68 Threaded bottom bracket shell width (mm)|70 Crank fixing screw included