BB30

Bottom Bracket 30mm

BCD

Bolt Circle Diameter

CS

Cassette Sprocket

Di2

Digital Integrated Intelligence

DUB

Durable Unified Bottom Bracket

eTap

Electronic Tap

FD-XX

Front Derailleur Model Code

GRX

Gravel RX

GS

GS

Medium Cage

GXP

Giga X Pipe

HG

Hyperglide

HTII

Hollowtech II

IG

Interactive Glide

OSPW

Oversized Pulley Wheel

QD

Quick Disconnect

RD-XX

Rear Derailleur Model Code

SL-XX

Shift Lever Model Code

SS

Short Cage