Shimano GRX RD-RX820 12V gearbox
Shimano GRX RD-RX820 12V gearbox
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The RD-RX820 model is compatible with 12V 11-34d and 11-36d boxes, and offers a wide range of relationships that allows you to maintain a comfortable cadence regardless of the type of soil. The Shimano GRX 12V gearbox is equipped with a stabilizer of the integrated chain that guarantees a more silent change and a safer management of the chain in the most demanding situations. The tennack is also equipped with an on/off switch for rides on uniform surfaces.
Characteristics
- Silent and reliable change on accidental terrain
- The adjustable stabilizer prevents the chain from slamming and prevents the fall of the chain
- Shimano Shadow RD+
- Changed fluid and reliable on mixed soils
- L'ON/OFF Intrructor of the stabilizer allows you to adapt to the ground
- Max difference between the teeth of the crowns: 17D
- Smaller pigno: max. 11d/min. 11d
- Larger pign: max. 36d/min. 34d
- Total capacity: 42d
- Guain Shimano Sis Ot-GRE 24 cm included
Technical specifications
- SERIES: GRX 12-Speed
- Pignoni: 12
- Compatible chain: 12 speed HG
- Top-Normal spring type: Shimano Shadow RD+
- Assembly: direct attack (conventional)
- Direct assembly
- Cable
- Max front difference: 17D
- Total capacity: 42d
Technologies
Shimano Shadow RD+
Less distractions for a silent transmission. The gearbox stabilizer reduces noise and has a simple solution to prevent the fall of the chain. Lighter and more efficient than the guide rollers.
Size Chart
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