1. Bicycle Rims For Sale
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  3. SHIMANO IFCM71201CXXT

SHIMANO IFCM71201CXXT Slx Boost Crank Arms Left Right FC-M7120-1 Left/right 175MM

Ifcm71201cxxt Shimano Fc-m7120-1 Slx Boost Crank Arms Left/right 175mm Black

( Brand: Shimano ), ( Manufacturer Part Number: IFCM71201CXXT ), ( Model: FC-M7120-1 ), ( Part Type: Crank ), ( Compatible Brand: For Shimano ), ( Color: Black ), ( Bottom Bracket Shell Type: Bsa ), ( Material: Aluminum ), ( Set Includes: Crankset ), ( Number Of Speeds: 1 Speed ), ( Crankarm Length: 175 Mm ), ( Compatible Bike Type: Mountain Bike ), ( Number Of Chainrings: Single )

Review SHIMANO Ifcm71201cxt Slx Boost Crank Arms Left/right 175mm Black

The **Shimano FC-M7120-1 SLX Boost Crank Arms (Left/Right, 175mm)** represent the pinnacle of Shimano s SLX series, engineered for cyclists who demand both rugged durability and precise performance in the most demanding off-road conditions. These crank arms are a cornerstone of Shimano s **Boost** system, a platform designed to enhance power transfer and efficiency by increasing the bottom bracket shell width from the standard 73mm to 86.5mm, reducing pedal stroke and improving mechanical advantage. Crafted from **high-strength aluminum alloy**, the arms are anodized in a **matte black finish**, offering both a sleek aesthetic and superior resistance to corrosion, ensuring longevity even in the harshest environments where salt, mud, and moisture are constant companions. The **175mm length** strikes an optimal balance between pedal clearance and pedal stroke efficiency, making them ideal for a wide range of mountain bike geometries, from aggressive downhill rigs to versatile trail bikes.

At the heart of these crank arms lies **Shimano s SLX drivetrain technology**, a series renowned for its reliability, weight savings, and performance in extreme conditions. The **Boost-compatible design** ensures seamless integration with Shimano s latest XT and SLX drivetrains, providing a robust foundation for shifting systems that deliver smooth, precise gear changes even under heavy loads. The **left-side crank arm** features a **right-hand thread (RHT) spindle**, while the **right-side crank arm** uses a **left-hand thread (LHT) spindle**, both designed to accommodate Shimano s **Hollowtech II bottom bracket system**, which reduces weight and friction while maintaining exceptional durability. The **11-speed compatible design** allows for integration with Shimano s latest **Deore or SLX groupsets**, offering cyclists the flexibility to upgrade their drivetrain without sacrificing compatibility.

For those who push their bikes to the limit, the **FC-M7120-1 SLX Boost crank arms** deliver a blend of **strength, efficiency, and adaptability**. The **Boost platform** not only enhances power transfer but also accommodates wider tires and more aggressive tire clearances, making these cranks a natural fit for bikes designed for aggressive riding styles. Whether tackling steep climbs, technical descents, or rough singletrack, the **anodized finish** and **high-grade aluminum construction** ensure these crank arms withstand the rigors of the trail without compromising performance. Shimano s attention to detail is evident in the **precise machining** of the arms, which minimizes vibration and maximizes rider feedback, allowing for better control and confidence in every pedal stroke. Whether paired with a **wide-range cassette** for climbing or a **compact setup** for descending, these cranks provide the stability and efficiency needed to conquer any terrain. Built for serious riders who refuse to compromise, the **FC-M7120-1 SLX Boost crank arms** are a testament to Shimano s commitment to innovation and performance in the world of off-road cycling.

The **Shimano FC-M7120-1 SLX Boost Crank Arms (175mm, Left/Right)** are a mid-range option in Shimano s FC-M7000 series, designed for mountain biking. Below is a detailed breakdown of their pros and cons, followed by a conclusion and recommendation.

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### **Pros**

1. **Boost Compatibility**

The crank arms are designed for **Boost compatibility**, meaning they fit modern Boost-compatible frames and forks (148mm BB shell). This ensures better chainline and stability, especially on aggressive trails or when paired with wider tires.

2. **Durable Construction**

The cranks are made from **aluminum alloy**, which provides a good balance between weight and strength. The FC-M7000 series is known for its robust build, suitable for heavy use on rough terrain.

3. **Smooth Drivetrain Integration**

The **FC-M7120** is part of Shimano s **SLX drivetrain family**, which is designed to work seamlessly with other SLX components (e.g., derailleurs, cassettes). This ensures consistent shifting performance and reliability, even in wet or muddy conditions.

4. **Moderate Weight**

While not ultra-lightweight, these cranks are reasonably light for their class, making them a practical choice for riders who prioritize performance without excessive weight.

5. **Affordable Mid-Range Option**

Compared to higher-end cranks (e.g., XT or Deore XX), the SLX cranks offer good value. They are less expensive than premium models while still delivering solid performance for most riders.

6. **Wide Chainline Support**

The Boost standard allows for a wider chainline, which improves traction and reduces chain rub, especially when paired with wider tires or aggressive tire angles.

7. **Shimano s Reliability**

Shimano is a trusted brand with a proven track record for durability and aftermarket support. The FC-M7000 series has been around for several years, meaning parts and service are widely available.

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### **Cons**

1. **Not as Light as Higher-End Options**

If weight is a critical factor (e.g., for aggressive downhill or enduro racing), the SLX cranks are heavier than Shimano s XT or Deore XX models. The FC-M7120 weighs around **300 320g** (left right), which is noticeably heavier than carbon cranks or even some aluminum XT cranks.

2. **Limited Upgrade Path**

The FC-M7000 series is a step below Shimano s XT and Deore XX lines. If you plan to upgrade your drivetrain in the future, you may need to replace the cranks as well, adding to long-term costs.

3. **Less Refined for Extreme Use**

While durable, the SLX cranks are not as refined as higher-end models for extreme use (e.g., downhill racing or heavy-duty enduro). They may lack the precision and fine-tuned feel of XT or Deore XX cranks.

4. **Potential for Chainline Issues**

Boost compatibility is great, but if your frame or fork is not properly aligned, you may experience chainline issues, leading to uneven wear or poor shifting. This requires careful setup.

5. **No Carbon Option**

Unlike some higher-end cranks (e.g., Shimano s Deore XX or SRAM s NEX), the SLX cranks are aluminum-only. Carbon cranks offer better stiffness and weight savings but at a higher cost.

6. **Wear Over Time**

As with any mid-range Shimano component, the SLX cranks may wear faster than premium models, especially under heavy use. This could require more frequent maintenance or replacement.

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### **Conclusion**

The **Shimano FC-M7120-1 SLX Boost Crank Arms** are a solid choice for riders who need a **durable, Boost-compatible crankset at a mid-range price**. They excel in **reliability, compatibility with SLX drivetrains, and Boost frame support**, making them ideal for **trail, cross-country, and light enduro riding**. However, they are **not the best option for weight-sensitive riders or those pushing the limits of downhill or extreme enduro**, where higher-end cranks (e.g., XT or Deore XX) would be more appropriate.

If you already own or plan to build an **SLX drivetrain** and need Boost compatibility, these cranks are a practical and cost-effective solution. If weight or extreme performance is a priority, consider stepping up to a more premium crankset.

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### **Recommendation**

**Buy the Shimano FC-M7120-1 SLX Boost Crank Arms if:**

- You are building or upgrading an **SLX drivetrain** and need Boost compatibility.

- You ride **trail, cross-country, or light enduro** and prioritize durability over weight.

- You want a **reliable, mid-range option** that integrates well with other Shimano components.

- Your budget is limited, and you don t need the absolute lightest or most refined cranks.

**Avoid them if:**

- You are a **downhill racer or heavy enduro rider** who needs the best possible performance and durability.

- Weight is a **critical factor**, and you can afford (or justify) a higher-end crankset (e.g., XT or Deore XX).

- You plan to **upgrade your drivetrain frequently** and want future flexibility.

- You prefer **carbon cranks** for better stiffness and reduced weight.

**Alternative Considerations:**

- For **better weight savings**, look at **Shimano Deore XX or XT Boost cranks** (e.g., FC-M8100 or FC-M9100).

- For **budget-friendly Boost cranks**, consider **Shimano Deore (FC-M6100)** if you don t need SLX-level durability.

- If you re open to non-Shimano, **SRAM NEX or RockShox cranks** offer competitive alternatives.

Details:

Came on new bike, lightly used until I switched out for shorter ones. Great condition.

part #: ifcm71201cxxt prices

  • $86.00-$137.83

specifications ribicycl:

  • brand: Shimano
  • mpn: Ifcm71201cxxt
  • model: Fc-m7120-1
  • part type: Crank
  • compatible brand: For Shimano
  • color: Black
  • bottom bracket shell type: Bsa
  • material: Aluminum
  • set includes: Crankset
  • number of speeds: 1 Speed
  • crankarm length: 175 Mm
  • compatible bike type: Mountain Bike
  • number of chainrings: Single

offer ribicycl:

  • sold: 0
  • started: April 25, 2026
  • availability: In Stock
  • quantity: 1
  • options: Ship-to-home

shipping ribicycl:

  • cost: $5.00
  • type: Fixed
  • service: USPS Ground Advantage
  • class: Standard
  • transit: 5-11 Days
  • carrier: USPS

returns ribicycl:

  • policy: No Returns

seller ribicycl:

  • city: Gaithersburg, Maryland
  • # reviews: 229
  • rating: 100.0%

payments ribicycl:

  • wallet: Apple-pay
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  • credit card: Mastercard

general ribicycl:

  • condition: Used
  • Cycling > Bicycle Components Parts > Cranksets
part type: crank, compatible brand: for shimano, bottom bracket shell type: bsa, set includes: crankset, number of speeds: 1 speed, crankarm length: 175 mm, compatible bike type: mountain bike, number of chainrings: single,
category: sporting goods > cycling > bicycle components parts > cranksets, color: black, material: aluminum, sku: 17677474090713722,
Shimano IFCM71201CXXT Is Similar To:
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5 offers $86.00–$137.83 USD
  • New. Offer #1 priced at $86.00 + $10.69 shipping estimate = $96.69* total. New in box.+$10.69 shipping
  • New. Offer #2 priced at $137.83 + $0.00 shipping estimate = $137.83* total. The simplicity of a 1x drivetrain with the stability and compatibility of Hollowtech II technology. SLX Crankset - 170mm - 12-Speed - Direct Mount - Hollowtech II Spindle Interface - Black.FREE SHIPPING
  • New. Offer #3 priced at $137.83 + $0.00 shipping estimate = $137.83* total. SLX Crankset - 175mm - 12-Speed - Direct Mount - Hollowtech II Spindle Interface - Black.FREE SHIPPING
  • New. Offer #4 priced at $139.00 + $12.06 shipping estimate = $151.06* total. SHIMANO SLX Boost Crank Arms Black 175mm Left/Right Crankset Arms.+$12.06 shipping
  • New. Offer #5 priced at $130.00 + $10.00 shipping estimate = $140.00* total. SLX Crankset. Shimano SLX Crankset - 12-Speed, Direct Mount, Hollowtech II Spindle Interface, Black.+$10.00 shipping

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