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Shimano GRX RX400 10-Speed Long Cage Rear Derailleur with Chain Stabilizer & Clutch
Reference Number: 3C91O3
Boost your gravel cycling performance with the Shimano GRX RD-RX400 Rear Derailleur - a durable and reliable component engineered specifically for mixed surface adventures. Designed with advanced materials and innovative technology, this 10-speed, long cage derailleur offers optimized shifting, superior chain stability, and enhanced durability for gravel, off-road, and adventure cycling enthusiasts.
Materials & Construction
Constructed from high-quality, lightweight aluminum and sturdy steel components, the Shimano GRX RD-RX400 ensures durability and corrosion resistance even in challenging terrain conditions. Its sleek black finish not only adds a professional aesthetic but also provides extra resistance against dirt and grime.
Performance & Engineering
Engineered for precision, this rear derailleur features Shimano's Shadow RD+ technology with a chain stabilizer that effectively minimizes chain slap and drops, ensuring smooth and reliable shifting across varied surfaces. The gravel-tuned clutch tension provides consistent tension on the chain for confident handling on rough roads and technical trails, reducing chain drop and enhancing rider control.
Components & Technology
Equipped with Shimano's innovative clutch mechanism, the RD-RX400 allows you to turn the stabilizer on or off, depending on terrain demands-ideal for mixed terrain riding. Compatibility with Shimano's 10-speed road shifters (ST-RX400, ST-4700, and others) makes this derailleur easy to integrate into your existing gravel, cyclocross, or endurance bike setup.
Style & Use Case
Designed for gravel riders, adventure cyclists, and endurance enthusiasts, the GRX RD-RX400 caters to those seeking reliable, high-performance shifting for long-distance mixed terrain adventures. The long cage design provides a large chain wrap capacity (up to 41 teeth), accommodating wider gear ranges and larger cogs-up to 36T-for tackling steep climbs and technical descents with confidence.
Innovative & Differentiating Features
Unique features include the gravel-specific clutch system with an adjustable stabilizer, ensuring the derailleur adapts seamlessly to different terrain types. Its direct mount design offers straightforward installation and maintenance, making it a dependable choice for both professional mechanics and avid cyclists.
Upgrade your gravel bike with the Shimano GRX RD-RX400 Rear Derailleur-engineered for durability, precision, and adaptability. Maximize your adventure potential with smooth, stable shifting tailored for any mixed surface ride.
- Optimized for gravel riding, the Shimano GRX RD-RX400 Rear Derailleur features a durable long cage design for enhanced gear range and reliability across mixed terrain.
- Constructed with high-strength materials and advanced engineering, this 10-speed derailleur provides precise shifting performance and exceptional durability under demanding riding conditions.
- Equipped with a Shadow RD+ chain stabilizer and gravel-tuned clutch technology, the RD-RX400 significantly reduces chain slap and drops, ensuring smooth, silent operation on rough surfaces.
- Designed for Shimano Road compatibility, this rear derailleur offers seamless integration with popular shift levers like ST-RX400 and ST-4700, making it perfect for gravel, adventure, and endurance bikes.
- Its sleek black finish combines style with functionality, while the adjustable clutch feature allows riders to optimize tension for varying terrains, providing versatile performance for endurance and gravel riding.
| Item Specifications | |
|---|---|
| Largest Cog | 36 |
| Color | Black |
| Rear Der/Shifter Compatibility | Shimano Road |
| Rear Derailleur Mount Type | Shimano Rear Direct Mount |
| Rear Derailleur Mount Type | 10x1 Standard |
| Drivetrain Speeds | 10 |
| Weight | 303 |
| Chain Wrap Capacity (teeth) | 41 |
| Cage Length | Long |
Why 365 Cycles?
365 Cycles is an Authorized Shimano Dealer, and we offer the Full Shimano Warranty!
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Shipping & Handling
Most orders placed during the workweek before 1:30 pm EST ship the same day, but in rare cases (peak season/holiday periods) handling time can take up to 48 hours. If you have questions regarding shipping estimates, please let us know prior to placing your order. There is a direct signature requirement for all orders over $500.Please allow 1-2 business days for your order tracking to update.
- Cut off for SAME DAY SHIPPING- 1:30 pm EST Monday - Friday
- Friday afternoon -Sunday orders ship the following Monday
- Due to carrier restrictions orders shipped to: PO Box, HI, AK, & PR 365 Cycles may use a comparable service to what was selected.
Combined Shipping Discounts
To offer customers savings on shipping, we offer discounts when shipping multiple items from our store. We cannot issue refunds on shipping once an order is finalized so please follow the 5 steps below and ask if you are having trouble with the discount before you make a purchase.- Be sure you are using the US site: https://www.ebay.com
- Select Add to Cart (instead of Buy It Now) with items from our store 365Cycles
- Click on Proceed to Checkout. On the checkout page, the shipping service on each line item needs to match
- Compare First Class vs Priority as sometimes Priority can be cheaper and it gets to you faster!
- You’ll need to change the shipping method to Priority on every item in your cart before the rate can be calculated.
Returns
365 Cycles offers returns for 30 days on new items in their original, intact packaging. Return shipping for ALL orders are to be paid by the buyer. Please be sure to read our return policy entirely and if you have any questions, please contact Customer Service.
Full refunds are issued on items that are brand new and we are able to resell as new. 365 Cycles reserves the right to deny returns that are outside of policy including, but not limited to, used items, items missing original packaging, items with damaged manufacturer packaging, or international orders. Return orders must be shipped in a box or bubble mailer. Items shipped without an outer box will incur a restocking fee. You will be contacted through eBay if your return is ineligible for a full refund.
Returns must be initiated within 30 days from purchase date through your Purchase History under My eBay.
If we make an error in shipping, please contact us -- we will ship out the correct item and provide a free prepaid return label as quickly as possible!
Exchanges
If you need to exchange your order, the fastest and easiest way to do this is to reorder. We will ship your new order immediately and, in the meantime, please initiate a return through eBay on the original item and return it. We will refund for the returned item once it is received back.
