SYMETRIC French derailleur 54/44T, BCD 110SYMETRIC French derailleur 54 44T, BCD 110 Specifications: 2 layer derailleur 54 44T 4 spokes BCD: 110mm Material: CNC 7075 T6 aluminum, hard, durable and much lighter Oval design, lighter pedaling, less stress on muscles and cardiovascular system Accelerate when climbing hills (increase about 5 seconds per km) Accelerate when flat (increase about 3 seconds per km) Compatible with many Shimano lines Origin: France GENUINE PRODUCTS, CHECK INSTALLATION

carbon made in Taiwan

range:    Suitable for Shimano full range of cranksets

Precision CNC Machining: The spoke holes on the flanges are CNC drilled with absolute precision

G3 silicon nitride ceramic ball      wrench：46-12/24（SRAMDUB）   No need to press special tools

VITTORIA brand

Material: Ultra-lightweight Aluminum Alloy

PF30A-24(cannondale)

It is located inside the head tube of the frame and connects the fork tube to the frame

Brake housing (or brake hose):

uses 2 valve heads

Bicycle 28H Centerlock front hub

BH90 brake hose is a type of oil brake hose used in hydraulic brake systems of bicycles