FSA BB-70-68 Megaexo Bottom Bracket Bsa Exo BB-70/68 68MM 1.37X24T BB-8000/6000

( Brand: Fsa ), ( Manufacturer Part Number: BB-70/68 ), ( Part Type: Bottom Bracket ), ( Bottom Bracket Shell Type: Bsa ), ( Spindle Type: Megaexo ), ( Material: Aluminum ), ( Shell Width: 68 Mm )

Review FSA Bb-70/68 Megaexo Bottom Bracket 68mm Bsa Bb-8000/6000 Mega Exo

The **FSA BB-70/68 MegaExo Bottom Bracket** is a high-performance, precision-engineered component designed to deliver unmatched rigidity, durability, and compatibility for modern road and gravel bicycles. This bottom bracket features FSA s signature **MegaExo** design, which integrates a **68mm shell width** a standard now widely adopted in the industry to maximize frame stiffness while maintaining compatibility with a broad range of fork and frame designs. Built to accommodate **BSA 1.37-inch axle standards**, it ensures seamless integration with older BSA-equipped frames, though it also works flawlessly with modern 1.37x24t (68mm) setups, offering versatility for both classic and contemporary builds. The **BB-8000/6000** series designation underscores its advanced engineering, with the **8000** variant optimized for high-end applications, featuring a **carbon fiber-reinforced shell** for superior strength-to-weight ratio and reduced vibration transmission, while the **6000** model provides a robust steel alternative for riders prioritizing durability and cost-effectiveness. The **Exo** designation further emphasizes its aerodynamic and structural efficiency, with a sleek, streamlined design that minimizes drag and enhances pedal efficiency. Whether paired with **hollowtech II** or **hollowtech III** cranks, this bottom bracket ensures smooth, repeatable performance, making it an ideal choice for competitive cyclists, gravel enthusiasts, and frame builders seeking a balance of heritage and innovation. Its **premium bearings** often sealed with high-performance lubricants deliver long-lasting smoothness, while the **press-fit retention system** ensures a secure, vibration-dampening fit within the frame. The **MegaExo** platform also accommodates wider axles (up to 24mm), providing additional stability and reducing the risk of lateral play, a critical consideration for riders pushing the limits of their bikes. Whether used in a custom build or as an upgrade for an existing rig, this bottom bracket exemplifies FSA s commitment to precision, reliability, and adaptability, making it a standout choice for discerning cyclists who demand nothing less than excellence.

### **Pros and Cons of buying a FSA BB-70/68 MegaExo Bottom Bracket (68mm BSA, 1.37" x 24T, BB-8000/6000 Exo)**

#### **Pros**

1. **High-End Performance** The MegaExo bottom bracket is designed for high-performance road and gravel bikes, offering superior stiffness and power transfer compared to standard bottom brackets. This makes it ideal for competitive riding or aggressive riding styles.

2. **Lightweight Construction** Made from high-quality aluminum and featuring an Exo (external) design, it reduces weight while maintaining rigidity. This is beneficial for riders looking to minimize unsprung mass.

3. **Compatibility with High-End Components** The 68mm BSA shell is compatible with a wide range of high-end drivetrains, including Shimano 105, Ultegra, Di2, SRAM Force, and Campagnolo groups. It also works with many carbon and aluminum frames that use this standard.

4. **Durability and Strength** The Exo design distributes stress more evenly, reducing the risk of shell deformation under heavy loads. This is particularly useful for riders who subject their bikes to rough terrain or aggressive riding.

5. **Easy Installation and Adjustment** The 1.37" x 24T thread standard is widely supported, and the Exo design allows for easier installation and maintenance compared to some older or more complex bottom brackets.

6. **Wide Availability of Parts** Since this is a well-established standard, replacement parts, bearings, and tools are readily available. This ensures longevity and ease of repair.

7. **Compatibility with Disc Brakes** The 68mm BSA shell is commonly used in disc-brake road and gravel frames, making it a versatile choice for riders who prefer or require disc brakes.

8. **Future-Proofing** The Exo design and 68mm BSA standard are likely to remain relevant for years, reducing the risk of obsolescence.

---

#### **Cons**

1. **Higher Cost** Compared to standard bottom brackets (e.g., Shimano Hollowtech II or SRAM DUB), the FSA MegaExo is more expensive. This may not be justified for casual riders or those on a tight budget.

2. **Overkill for Casual Riding** If you ride mostly for leisure, commuting, or light recreational cycling, the performance benefits of the MegaExo may not be noticeable. A more affordable standard bottom bracket would suffice.

3. **Potential Over-Torquing Risk** The Exo design can sometimes be more sensitive to overtightening during installation. Improper torque can lead to premature bearing wear or shell damage, so precise installation is required.

4. **Limited Frame Compatibility** While the 68mm BSA shell is common, some older or budget frames may not support it. Always verify compatibility with your frame s bottom bracket shell dimensions.

5. **Maintenance Requirements** Like all high-performance components, the MegaExo requires regular maintenance (lubrication, bearing checks) to ensure longevity. Neglecting maintenance can lead to premature failure.

6. **Weight vs. Cost Trade-Off** While the MegaExo is lightweight, the weight savings may not be significant enough to justify the cost for every rider. Some may find that the difference is negligible compared to other weight-saving components (e.g., wheels, pedals).

7. **Potential for Overengineering** For riders who don t push their bikes to extreme limits, the MegaExo s stiffness and strength may be unnecessary, leading to an unnecessary expense.

---

### **Conclusion**

The FSA BB-70/68 MegaExo bottom bracket is an excellent choice for **serious road or gravel cyclists** who prioritize performance, stiffness, and durability. Its lightweight construction, compatibility with high-end components, and robust design make it a top-tier option for competitive or aggressive riding. However, for **casual riders, commuters, or those on a budget**, the cost may not be justified, and a standard bottom bracket would likely provide adequate performance without the premium price.

If you ride frequently, push your bike hard, or are building a high-performance setup, the MegaExo is a worthwhile investment. For everyone else, it may be overkill.

### **Recommendation**

- **Buy it if:** You ride competitively, prioritize stiffness and power transfer, use a compatible high-end drivetrain, or ride on rough terrain where durability is critical.

- **Skip it if:** You ride casually, are on a tight budget, or don t feel the need for the extra stiffness and weight savings.

- **Alternative options:** Consider a **Shimano Hollowtech II (for road) or SRAM DUB (for gravel)** if you want a balance of performance and cost, or a **carbon bottom bracket** if weight is a major concern and budget allows.

Details:

FSA MegaExo Bottom Bracket 68mm BSA 1.37x24T BB-70/68 BB-8000/6000 Mega Exo. Brand and model: FSA MegaExo bottom bracket BB-70/68 BB-8000/6000. FSA MegaExo BB-70/68 BB-8000/6000 bottom bracket with cosmetic wear from previous installation and use. Bearings are present but functional performance is not tested; listing includes the single bottom bracket only, plastic bag, calipers, and any other background items visible in photos included.

Gold cups and sleeve have scratches, small nicks, worn tool engagement notches, heavy grease, dirt, residue on the threads around seals; printed FSA MegaExo graphics show rubbing loss of paint. Only the parts shown in pictures are included. Part type and use: external cup bottom bracket for road bike crank sets using FSA MegaExo 24mm spindles.

part #: bb7068 prices

• $14.24-$39.99

specifications ribicycl:

• brand: Fsa
• mpn: Bb-70/68
• part type: Bottom Bracket
• bottom bracket shell type: Bsa
• spindle type: Megaexo
• material: Aluminum
• shell width: 68 Mm

seller ribicycl:

• city: Neenah, Wisconsin
• rating: 100.0%
• # reviews: 32539

payments ribicycl:

• wallet: Paypal
• credit card: Mastercard
• other

offer ribicycl:

• availability: In Stock
• best offers: True
• started: March 17, 2026
• sold: 0
• quantity: 1
• options: Ship-to-home

returns ribicycl:

• method: Money back
• paid by: Seller
• time: 60 Days
• policy: Returns Accepted

general ribicycl:

• condition: Used
• Cycling > Bicycle Components Parts > Bottom Brackets

shipping ribicycl:

• cost: $9.97
• class: Standard, Expedited
• type: Fixed
• carrier: USPS, FedEx
• transit: 3-7 Days
• service: USPS Ground Advantage, USPS Priority Mail, FedEx Ground / FedEx Home Delivery

Fsa BB-70-68 Is Similar To:

• 106-112-0004 Fsa Mega Exo Crankset Locking Bolts With Tool (21.1% similar) Fsa mega exo crankiest locking bolts black silver with T-30 chaining nut bolt tool...(April 1st, 2018)
• 200-0012000110 Fsa Speed Crank To Bottom Bracket Full Ahead (38.8% similar) Shipped with USPS first class package. Condition is new. New no box Fsa BB386 crank to BB86 BB92 bottom bracket...(March 8th, 2019)
• 200-3210 Fsa Speed Stainless Bottom Bracket Adapter For Sram 400310053152 (39.2% similar) ...(March 7th, 2019)
• 230-4000 Full Speed Ahead New Fsa Mega Exo Spindle 400310019752 (20.3% similar) Retail price is manufacturers suggested and may not reflect actual selling prices. Alternatively, please go to purchase history and find the order you want cancel. New Fsa mega exo spindle o-ring MS150 24MM id metal rubber each small parts. Fsa mega exo small parts...(February 5th, 2019)
• 230-5005a Fsa Bottom Bracket Adapter New In Factory Package (35.8% similar) New in packaging, 30MM bb adapter with instructions and lock tote...(January 8th, 2019)
• 313-0279433050 Fsa Comet Crankset Modular Megaexo Black 840031034359 (32.2% similar) 8-8 Mon-Fri, 12-4 sat sun est chat with us...(February 1st, 2019)
• 313-0279435050 Fsa Comet Crankset Modular Megaexo Black (26.2% similar) 8-8 Mon-Fri, 12-4 sat sun est chat with us...(January 31st, 2019)
• 330-0158bj2261 Fsa Omega Alloy Double Crankset Mm Black Megaexo 840031016188 (26.5% similar) Updated 11-SPEED compatibility puts the latest shifting technology into an attractive price conscious crankiest. Fsa omega alloy double crankiest black megaexo the megaexo is where fashion meets function, combining sleek styling with robust industrial design elements. Die cast aluminum crank ...(November 4th, 2018)
• 400310058188 Fsa Speed Road Stainless Bottom Bracket Bbright Direct (38% similar) Stainless steel BB30 cartridge bearings for 68MM wide frames wave spring and cir clips included nylon adjustment washers bb shell width mm: 68, 73 79 frame interface: Bright direct fit bottom bracket...(December 1st, 2018)
• Bb-al86 Fsa Megaexo Press Fit Bottom Bracket (45.4% similar) 5 x 41MM and BB92 MTV shells note: oem part no retail packaging. For sale is one new, blemished: Fsa BB86 road bike press fit bottom bracket cups 24MM megaexo systems, model BB-AL86. Compatible with megaexo 24MM crank sets. Functionally excellent. Shown is a stock image actual product appearance ...(March 29th, 2018)
• Bb-cf86-sle-c Fsa Road Or Mtb Bike Bearing Bottom Bracket Mega Exo (45.4% similar) Will not work with BB386, BB30, PF30, or GP. Fsa road or mountain bike bearing bottom bracket BB86 92 mega exo shaman 24MM PF86 BB92 shell compatible composite cups for use in a carbon exo, only...(March 26th, 2018)