Shimano Ultegra RDR8000GS Rear Derailleur E-Bike Weight: 200g (regular) / 205g

Weight: 200g (regular) / 205g (large)

and it's lighter than a coil spring

SHIMANO TOURNEY - 7-Speed - HYPERGLIDE - MTB Cassette Sprocket

you can consume substantially more carbohydrates – up to 90g per hour in fact

But don't hesitate

Shimano Ultegra RDR8000GS Rear Derailleur E-Bike Weight: 200g (regular) / 205gDescription Ultegra Shadow design rear derailleur with wide link design gives quick accurate shifts and excellent drivetrain efficiency Sleek appearance with Low profile Shadow design construction reduces risk of damage in a crash Wide outer link plates increase pivot joint rigidity to reduce shifting deflection Lightweight aluminium pulley cage helps reduce weight without sacrificing shifting performance Wide gear ratio compatible with 11 28 up to 11