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

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

TRP EVO Mountain Bike Drivetrains Hit the Trails - Bikerumor

Death of The Derailleur? Shimano's Gearbox Patent

TRP EVO Mountain Bike Drivetrains Hit the Trails - Bikerumor

Shimano Di2 patent floats derailleur resisting impacts - Bikerumor

The lowdown on Shimano XTR M9100 - Fanatik Bike Co.

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

3. Parts & Tech info Llave inglesa - by fernandoj

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

Disraeli gears: the world's greatest collection of derailleurs