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Shimano GRX ST-RX400 Individual Lever Right - 10-Speed
Shimano GRX ST-RX400 Individual Lever Left - 2-Speed
Right - 10-Speed
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Shimano GRX ST-RX400 Individual Lever Right - 10-Speed
Shimano GRX ST-RX400 Individual Lever Left - 2-Speed

GRX ST-RX400 Individual Lever

Mfg PartNum:
  (1 customer reviews)
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Backorder: This item is currently not in stock but is available to purchase today as a backorder. The expected availability date shown above is our best estimate as to when it will be shipped to you, but this date is subject to change based on our receipt of this item from its vendor. Shipping in the continental US is free for all backorder items (for international orders, our customer service team will contact you when the item is available to ship). Your credit card will not be charged until your item ships (Paypal requires payment up front, but you can cancel for full refund). Anytime prior to shipment, your backorder can be cancelled by contacting our customer service team.


The Shimano GRX ST-RX400 is a 10-speed gravel inspired dual control shift/brake lever with the same intuitive and quick shifting operation as top tier systems. The tooled reach adjust allows for the lever to be adjusted to fit multiple hand placements and rider hand sizes.

The ergonomic design offers a more drastic slope and a textured brake lever, increasing comfort and control on trails and mixed-terrain.


  • Designed for mixed-terrain riding
  • Anti-slip brake lever
  • Same light shifting as top level shifters
  • Tooled reach adjust to perfectly dial in your ride
  • Purchase both the left and right for a complete set
  • Kit does not include hose or caliper

B-Stock - This product has one or more B-Stock units available. These units can be purchased at a discount (see option select). B-Stock units were returned from other customers and may have missing or damaged packaging materials. These units are otherwise as new. The full manufacturer warranty applies. Click Here for more information.


Series: GRX 


Actuation: Hydraulic brake, mechanical shifter 


Speeds: 10 


Gearing: 2x10 speed 


Brake Type: hydraulic disc brake 


Claimed Weight: 306 g


Discipline: Gravel/Mixed-terrain 


Shifter Type: Drop Bar 

Left - 2-Speed

Mfg PartNum: ISTRX400LI 

Right - 10-Speed

Mfg PartNum: ISTRX400RBI 

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Great product in inventory at a good price
by KS
Cycling Enthusiast

Had to replace the left SHIMANO GRX ST-RX400 INDIVIDUAL LEVER on a Trek Checkpoint after a crash. Local bike shop could not source this part. WesternBikeWorks had it in stock and shipped it quickly at no charge. This is one of the reasons that they are my primary online bike shop.

Reviewed 9/7/2021
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