E-THIRTEEN FW2URA-113 Helix Race Gravel Mtb Bike Cassette 4710751508798 E.13 9-46T

( Brand: E-thirteen ), ( Manufacturer Part Number: FW2URA-113 ), ( Part Type: Bike Cassette ), ( Color: Gray ), ( Set Includes: Cassette/freewheel ), ( Material: Aluminum ), ( Smallest Sprocket: 9 Tooth ), ( Number Of Speeds: 12 Speed ), ( Freehub/driver Type: Sram Xd ), ( Largest Sprocket: 46 Tooth ), ( Compatible Bike Type: Cassette ), ( Country Of Origin: Taiwan ), ( UPC: 710751508798 )

Review E THIRTEEN E.13 Helix Race Speed Gravel Mtb Bike Cassette E13 Grey

The **Shimano 13-speed FW2URA-113 E.13 Helix Race 12 Gravel MTB Bike Cassette (9-46T)** is a high-performance, precision-engineered drivetrain component designed to elevate the efficiency, versatility, and durability of gravel and adventure-oriented mountain bikes. Part of Shimano s cutting-edge Helix series, this cassette represents a fusion of advanced engineering and refined tuning, tailored specifically for riders who demand seamless shifting, robust durability, and adaptability across a wide range of terrains from rugged gravel trails and fire roads to technical singletrack and light off-road adventures. The **E.13** designation underscores its compatibility with Shimano s 13-speed Deore XT and SLX groupsets, ensuring seamless integration with modern hydraulic disc brake systems and electronic shifting solutions, while the **FW2URA-113** model is optimized for the aggressive 12-speed chainline found on many gravel and cross-country bikes, reducing chainline errors and improving shifting consistency. With a **9-to-46-tooth ratio**, this cassette delivers an expansive gear range, allowing riders to conquer steep climbs with ease while maintaining control at high speeds on smoother surfaces. The **Helix Race 12** design incorporates Shimano s proprietary **Helix Drive** technology, which enhances chain engagement by minimizing lateral chain movement, reducing wear on both the cassette and chain, and improving overall shifting smoothness critical for gravel riding where inconsistent terrain demands quick, precise adjustments. Constructed from high-grade **Shimano Alloy**, the cassette s sprockets are precision-machined to maintain optimal tooth alignment, ensuring longevity even under the demanding conditions of gravel riding, where debris and rough surfaces can accelerate wear. The **13-speed configuration** further amplifies the cassette s versatility, offering riders a wider array of gearing options to match their riding style, whether they prioritize climbing efficiency, descending speed, or a balanced approach to both. Whether paired with a wide-range drivetrain for extreme gravel adventures or a more moderate setup for recreational riding, this cassette exemplifies Shimano s commitment to innovation, performance, and reliability, making it an ideal choice for gravel enthusiasts who refuse to compromise on quality or capability.

### **Pros and Cons of buying a Thirteen FW2URA-113 E.13 Helix Race 12 Gravel MTB Bike Cassette (E13, 9-46T)**

1. **Wide Gear Range (9-46T)** The 9-speed cassette with a 9-46T ratio provides excellent versatility for gravel riding. The low end (9T) is ideal for steep climbs and rough terrain, while the high end (46T) offers sufficient power for faster sections and descents. This makes it suitable for both endurance gravel rides and mixed-terrain adventures.

2. **Compatibility with 1x Drivetrains** The E13 (12-speed) cassette is designed for modern 1x setups, which simplifies shifting and reduces chain wear compared to multi-chainring systems. This is particularly useful for gravel bikes, where a single front chainring improves reliability and reduces maintenance.

3. **Durability and Performance** Thirteen is a reputable brand known for high-quality components, including cassettes that are built to withstand the demands of gravel riding. The Helix series is designed for endurance and efficiency, making it a solid choice for riders who prioritize performance and longevity.

4. **Lightweight Construction** The cassette is likely made from materials like steel or a steel/aluminum alloy, which balances strength with weight. This helps keep the drivetrain efficient without adding unnecessary bulk, which is beneficial for gravel bikes where weight matters.

5. **Compatibility with 12-Speed Systems** The E13 designation indicates it is designed for Shimano s 12-speed drivetrains (e.g., Deore, SLX, or higher-end groupsets). This means it will work seamlessly with modern Shimano components, offering smooth shifting and reliable performance.

6. **Versatility for Gravel Riding** Gravel bikes often require a mix of climbing and rolling capabilities. The 9-46T range strikes a good balance, allowing riders to tackle everything from technical climbs to fast pavement sections without needing to swap gears excessively.

7. **Ease of Maintenance** A single-chainring system reduces the number of moving parts compared to multi-chainring setups, which can simplify maintenance and reduce the risk of chain skips or misalignment.

---

1. **Limited Upshifting Capability** While the 46T top gear is adequate for many gravel rides, it may feel restrictive on very smooth or fast sections, especially if the rider is powerful or prefers higher cadences. Some riders might prefer a slightly higher top gear (e.g., 48T or 50T) for efficiency on pavement or rolling terrain.

2. **Potential for Chain Wear** Gravel riding often involves riding on rough surfaces, loose gravel, or dirt, which can accelerate chain and cassette wear. A wider ratio (like 9-46T) may also increase the strain on the cassette over time, requiring more frequent maintenance or replacement.

3. **Compatibility Issues with Non-Shimano Systems** The E13 cassette is specific to Shimano s 12-speed platform. If the rider uses components from other brands (e.g., SRAM, Campagnolo), compatibility may be limited or require additional adapters, which could affect shifting performance.

4. **Cost Relative to Alternatives** While not excessively expensive, the price of a high-quality cassette like this may be higher than entry-level options. Riders on a tight budget might consider slightly lower-end cassettes (e.g., Shimano Deore or older models) for similar performance with reduced cost.

5. **Potential for Overkill for Casual Riders** If the rider primarily does light gravel rides or commuting with minimal elevation changes, a slightly narrower cassette range (e.g., 10-42T) might suffice. The 9-46T range offers more than necessary for casual use, which could lead to unnecessary gear changes or discomfort in certain situations.

6. **Maintenance Requirements** Gravel riding often means more dirt and debris in the drivetrain, which can lead to increased maintenance needs. Riders who neglect cleaning and lubrication may experience premature wear on the cassette and chain.

---

The Thirteen FW2URA-113 E.13 Helix Race 12 Gravel MTB Cassette (9-46T) is an excellent choice for riders who prioritize versatility, durability, and compatibility with modern 1x drivetrains. The wide gear range makes it ideal for gravel riding, where terrain varies significantly, and the E13 platform ensures smooth shifting with Shimano components. However, the cassette s low end may be excessive for riders who rarely tackle steep climbs, and its compatibility is limited to Shimano systems. Additionally, gravel riding s inherent roughness can accelerate wear, requiring more frequent maintenance.

For most gravel riders especially those who frequently tackle mixed terrain, climbs, or technical sections the 9-46T range is a strong advantage. If the rider s budget allows and they plan to use Shimano components, this cassette is a reliable and high-performing option.

- You ride gravel frequently and need a wide gear range for climbs and descents.

- You are using a Shimano 12-speed drivetrain (e.g., Deore, SLX, or higher).

- You prefer a 1x setup for simplicity and reliability.

- You prioritize durability and performance in varied conditions.

- You primarily ride smooth terrain and don t need the extreme low end (9T).

- You use non-Shimano components and need broader compatibility.

- You are on a tight budget and can find a similarly performing cassette at a lower cost.

- You plan to ride mostly on pavement or flat terrain, where a narrower range (e.g., 10-42T) might suffice.

Overall, this cassette is a solid investment for gravel riders who want a versatile, high-quality drivetrain component.

Details:

I bought this for a gravel bike project that never materialized and now I'm onto 13sp so is just sitting. Includes spacer and lock bolt. Shipping cost is included in my asking price via economy ground. Its in good cosmetic condition.

Shows normal signs of use, but no broken or bent teeth.

part #: fw2ura113 prices

• $177.00-$335.11

specifications ribicycl:

• brand: E-thirteen
• mpn: Fw2ura-113
• part type: Bike Cassette
• color: Gray
• set includes: Cassette/freewheel
• material: Aluminum
• smallest sprocket: 9 Tooth
• number of speeds: 12 Speed
• freehub/driver type: Sram Xd
• largest sprocket: 46 Tooth
• compatible bike type: Cassette
• country of origin: Taiwan
• upc: 710751508798

payments ribicycl:

• other
• wallet: Paypal
• credit card: Diners-club

general ribicycl:

• Cycling > Bicycle Components Parts > Cassettes, Freewheels Cogs
• condition: Used

offer ribicycl:

• availability: In Stock
• started: March 27, 2026
• options: Ship-to-home
• quantity: 1
• sold: 0

seller ribicycl:

• city: Dallas, Oregon
• rating: 100.0%
• # reviews: 890

returns ribicycl:

• policy: No Returns

shipping ribicycl:

• carrier: FedEx
• service: FedEx Ground Economy
• cost: $0.00
• class: Economy
• type: Calculated
• transit: 4-8 Days

E-thirteen FW2URA-113 Is Similar To:

• Cr.32.k Thirteen Guide Ring Black Speed New 4712757571301 (35% similar) Sealed: do not come sealed from manufacturer: guttering 32 : Thirteen by the hive mfr part: Cr. K model: Thirteen by the hive guide ringside: 32 tooth type: aluminum style: 104MM 4-BOLT color: jet black material: 7075 aluminum teeth: chaining BC: 104 chain compatibility: 9-SPEED shaman 10 sram ...(June 6th, 2018)
• Fw1tpa-102 Thirteen Trs Plus Speed Cassette For Xd Driver 4710751503786 (42% similar) Using a unique 3 piece assembly, the trs cassette offers 9 tooth to 44 11 speed or 42 10 range. The remaining eight steel cogs lock into place with a chain whip. The largest two 10 speed or three 11 cogs are precision machined from aluminum and locked onto a sram xd driver body. The front cogs are ...(March 7th, 2019)
• Fw1tra-100 Thirteen By The Hive Trsr Speed Cassette For Xd Driver (41.1% similar) Heavy wear on some cogs...(July 15th, 2018)
• Hbf.unv-6d.k E.13 E.thirteen Sram-shimano 9-10-speed 4712757578799 (25% similar) In-stock items purchased before 12 PO. Mountain time ship same day. For any other reason: you can return the product reason, as long it is in original condition when was purchased, with packaging. Mountain time. 13 manufacturer part . Product ships through USPS or ups ground. CY87 mountain time. ...(January 28th, 2018)
• 27.5-inch Rm3tra-101 E Thirteen New Trs Race Carbon Rim 32 H Tubeless Black (28.6% similar) Full manufacture warranty. Compare first vs priority as sometimes priority can be cheaper and it gets there faster. Items must be in original, unopened packaging. Products without packaging, damaged packaging or take off products are indicated within the listing...(May 10th, 2016)
• 4710751501799 E Thirteen By The Hive Lg1 Race Carbon Rim 27.5 32h Tubeless Black (31.3% similar) 5 wheel SIZE27. Item DRILLING32ISO DIAMETER584 650B 27...(October 5th, 2016)
• Rm3tra-101 E Thirteen By The Hive Trs Race Carbon Rim 27.5 32h Tubeless Black (31.9% similar) 25 height width length 27...(October 13th, 2016)
• E Thirteen Cr4epa-103 Spec Direct Mount Chainring 32t 11 12 Speed For Tq Cl55 Black (39.8% similar) Haven tested it so listing for parts. Thirteen 32 tooth chaining made for e-bikes. Its direct mount. Used condition...(August 1st, 2024)
• E Thirteen Ee04547 Top Mint Lg1 Race Dh Carbon Crank 170mm Japan (33.3% similar) Accessories: please see picture. Appearance: non-drive side spindle, large reduction in q-factor, profile, and volume. The item has an obvious problem that was not mentioned in the listing. E thirteen LG1 race DH carbon crank, 30MM spindle, DH83MM shell width , non-boost, boost, super boost ...(August 5th, 2024)
• E Thirteen Fw2hra-118 Helix Race Cassette 12-speed 9-52t Intergalactic (58.2% similar) Includes bushing and set screw. Used, good condition with less than 150 miles on it...(August 11th, 2024)
• E Thirteen 710751506695 Race Carbon Handlebar 20mm Rise 800mm Width 35mm Clamp Black (30.2% similar) E13 carbon race bars. 800MM length . 35MM clamp diameter. Used but very good condition. 5 degree up sweep...(August 17th, 2024)