Patent Round-up: Shimano's Crazy Derailleur, Electronic Shifter

What do you think of cheap cycling products, since brand like Shimano Sram are too expensive? - Quora

Death of The Derailleur? Shimano's Gearbox Patent

Patent Pending Articles - Pinkbike

Otso Voytek Review: Shapeshifter

SRAM Drops GX Eagle Transmission, Page 3

Intuition Be Damned — SRAM eTap Groupset Review, by Rich Gearing

Lal Bikes' Innovative Supre Drive MTB Drivetrain is off to a Super Start - Singletracks Mountain Bike News

Shimano patents reveal wireless shifting and copper disc rotors could be on the way

The Patent Thread - New and Wild Mountain Bike Inventions - The Hub - Mountain Biking Forums / Message Boards - Vital MTB

Derailleur - Wikipedia

The lowdown on Shimano XTR M9100 - Fanatik Bike Co.

Patent Round-up: Shimano's Crazy Derailleur, Electronic Shifter & SRAM's Floating Brakes - Pinkbike

Review: Shimano 105 R7100 Di2 Groupset

Disraeli gears: the world's greatest collection of derailleurs