SHIMANO GRX RD-RX820 2x12-SPEED REAR DERAILLEUR discount_processed 1 x Bosch adapter from

1 x Bosch adapter from Active/Performance Line to Classic+

Addix-E | Compound developed for E-bikes with maximum durability

making it a practical upgrade for riders seeking simplified

700x29C: 285 g

0 mm twin-parallel

SHIMANO GRX RD-RX820 2x12-SPEED REAR DERAILLEUR discount_processed 1 x Bosch adapter fromThe Shimano GRX RD RX820 is a 2 x 12 speed rear derailleur engineered for gravel and mixed terrain riding. Its integrated chain stabilizer reduces bounce and chatter on rough surfaces, with an ON OFF switch to deactivate it on smooth roads. The Shadow Plus design delivers precise, quiet shifting, while the cold forged aluminium construction keeps weight minimal without compromising durability. Compatible with 12 speed Hyperglide+ chains and cassettes