GRX RD-RX400
10% off with code BF2026
Shimano

GRX RD-RX400

$88.99
/
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UPC / SKU
UPC
192790448893
SKU
IRDRX400
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GRX RD-RX400 $88.99
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GRX RD-RX400 Rear Derailleur


A Shadow RD+ chain stabilizer prevents chain slapping and drops The gravel-tuned clutch tension helps to provide smooth and reliable mixed surface shifting Stabilizer can be turned on/off to match terrain Compatible only with 10-speed ST-RX400, ST-4700, ST4720, ST-4725, ST-RS405 and SL-4700 shift levers

Bike shipping: $100 for non-electric bikes; $250 for e-bikes.

Higher rates apply to certain long-distance destinations, including Newfoundland and Labrador. Additional charges may apply to remote or rural locations and oversized or overweight items.

Free standard shipping on eligible orders over $150, excluding bikes and e-bikes.

Your shipping charge is shown at checkout before you place your order.

Signature required on delivery for all bikes and e-bikes, deliveries to apartment buildings, and orders of $300 or more.

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  • Request deadline: Within 7 days of receiving your bike or 14 days of receiving other items.
  • Condition: Brand-new, never used, and in original packaging. Bikes must be never ridden.
  • Final sale: Sale and special-order items cannot be returned or exchanged. A discount code on a regular-price item does not make it final sale.
  • Return deadline: Approved items must reach us within 7 days of approval.
  • Processing fee: 5% of the amount paid for returned items, excluding taxes and shipping, is deducted from your refund—even for returns brought to a store.
  • Shipping: You pay return shipping or may bring approved returns to either store. Original delivery charges are non-refundable.
  • Start a return: Submit our Online Orders Support form and wait for approval before returning anything.

Read full Returns & Exchanges Policy

For answers to frequently asked questions, visit our FAQ page.

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