KTM AB345 Rear Wheel Axle Hub FT85

( Manufacturer Part Number: AB345 ), ( Part Type: Wheel Axle Hub ), ( Wheel Width: 2.25 ), ( Country Of Origin: Austria )

Review KTM Inch Rear Wheel Axle Hub fits MX MXC 125 2018

The **KTM AB345 125 MX/MXC/FT85 Rear Wheel Axle Hub** is a precision-engineered component designed to deliver uncompromising performance, durability, and reliability for the latest generation of KTM s 125cc off-road and trail adventure motorcycles. Crafted from high-grade, heat-treated steel, this axle hub is built to withstand the extreme stresses of aggressive riding, including high-speed cornering, deep mud, and rough terrain, ensuring consistent power transfer and minimal flex under heavy loads. The hub features a robust, sealed bearing assembly that resists contamination from dirt, water, and debris, maintaining smooth operation even in the harshest conditions. Its precise machining and optimized geometry align perfectly with the KTM AB345 s drivetrain, reducing friction and wear while maximizing torque efficiency critical for both motocross and enduro applications. The FT85 variant, tailored for the dual-sport model, incorporates subtle design refinements to accommodate the slightly different suspension and wheel setup, ensuring seamless integration with the bike s handling dynamics. Whether you're tearing up a motocross track, conquering technical trails, or navigating urban-adventure routes, this axle hub delivers the strength and responsiveness riders demand from KTM s legendary off-road machines. Built to meet or exceed OEM specifications, it s an ideal replacement for stock units, offering extended service life and peace of mind for those seeking to maintain or upgrade their bike s performance without compromising on quality.

### **Pros and Cons of Buying a Used KTM AB345 125 MX/MXC/FT85 (Rear Wheel Axle Hub Replacement)**

#### **Pros**

1. **Reliable and Proven Platform** The KTM AB345 (and its variants like the MXC and FT85) is based on a well-regarded engine and chassis design, known for durability and performance in off-road applications. KTM s reputation for quality and innovation in the dirt bike and dual-sport segments ensures a solid foundation.

2. **Lightweight and Agile** The bike s aluminum frame and compact size make it highly maneuverable, ideal for trail riding, motocross, or light dual-sport use. This agility is particularly beneficial for riders navigating tight or technical terrain.

3. **Cost-Effective Entry into Dual-Sport or MX** Compared to full-fledged motocross bikes or high-end dual-sports, the AB345 and its variants offer a more affordable entry point without sacrificing too much performance. The 125cc engine provides enough power for casual to intermediate riders.

4. **Versatile Use Cases** The AB345 can be used for motocross, trail riding, or light off-road adventures, depending on the setup (e.g., MXC for dual-sport, FT85 for adventure-ready configurations). This versatility extends the bike s lifespan and appeal.

5. **Easy to Maintain and Modify** KTM bikes are known for their straightforward maintenance requirements, and the AB345 is no exception. Many parts are readily available, and the bike s simplicity makes it accessible for DIY repairs. Upgrading components like suspension, exhaust, or brakes is also relatively straightforward.

6. **Strong Community and Support** KTM has a large and active rider community, with abundant aftermarket parts, forums, and tutorials available. This makes troubleshooting and modifications easier for owners.

7. **Good Fuel Efficiency** The 125cc engine is fuel-efficient, making it cost-effective for longer rides or frequent use, especially in dual-sport configurations where range is important.

8. **Potential for Upgrades** The bike s design allows for upgrades to improve performance, comfort, or durability. Examples include aftermarket suspension, tires, or exhaust systems, which can enhance the riding experience.

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#### **Cons**

1. **Limited Power for Advanced Riders** The 125cc engine, while sufficient for beginners and casual riders, may feel underpowered for experienced riders or those looking to push the bike aggressively. It lacks the torque and top-end speed of larger displacement bikes (e.g., 250cc or 450cc).

2. **Durability Concerns with Heavy Use** While the AB345 is robust, it is not built for extreme motocross or heavy-duty off-roading. Frequent high-speed jumps, aggressive riding, or rough terrain can stress components like the suspension, clutch, or engine, leading to premature wear.

3. **Rear Wheel Axle Hub Replacement Cost** The specific mention of the rear wheel axle hub suggests that this part may have failed or is nearing the end of its lifespan. Axle hubs are not overly expensive individually, but if the issue is part of a broader problem (e.g., bearing wear, misalignment), the repair cost could add up. Additionally, finding the exact replacement part may require sourcing from KTM or authorized dealers, which can be inconvenient.

4. **Suspension Limitations** The stock suspension on the AB345 is adequate for light use but may not handle heavy riders or rough terrain well. Upgrading to aftermarket suspension (e.g., hlins or WP) can improve performance but adds to the cost.

5. **Comfort for Longer Rides** While the bike is agile, it lacks the comfort features of larger dual-sports (e.g., longer travel suspension, ergonomic seating). Riders planning extended off-road trips may find themselves fatigued sooner than on a more adventure-oriented bike.

6. **Resale Value** Like most used bikes, the AB345 s resale value depreciates over time. If you plan to upgrade later, the bike may not retain much value, especially if it has significant mileage or wear.

7. **Weather and Terrain Limitations** The bike s lightweight design and lack of full adventure features (e.g., long-travel suspension, windshield, or heavy-duty tires) make it less suitable for extreme weather conditions or rough, muddy, or rocky terrain. The MXC and FT85 variants help mitigate this somewhat, but they are not as capable as full adventure bikes.

8. **Noise and Vibration** The 125cc engine can be loud, and the bike s lightweight frame may transmit more vibration to the rider, especially on rough terrain. This can be mitigated with aftermarket components but is a consideration for comfort.

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### **Conclusion**

The KTM AB345 125 (and its variants) is a capable and fun bike for riders seeking an affordable, versatile, and easy-to-maintain option for motocross, trail riding, or light dual-sport use. Its lightweight design, reliability, and strong aftermarket support make it a practical choice for beginners and intermediate riders. However, its limitations in power, durability under heavy use, and comfort for extended rides mean it may not suit advanced riders or those planning to tackle extreme off-road conditions.

The need for a **rear wheel axle hub replacement** indicates that the bike may have some wear, which is a normal part of aging machinery. If the hub is the only significant issue and the rest of the bike is in good condition, this is a manageable repair. However, if the bike has high mileage or other neglected components (e.g., suspension, chain, or engine), the repair cost may outweigh the bike s value.

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### **Recommendation**

1. **If you are a beginner or casual rider** looking for a fun, affordable, and easy-to-maintain bike for motocross or light trail riding, the AB345 is a solid choice **especially if the axle hub issue is isolated and the rest of the bike is in good shape**. Budget for the hub replacement and consider a basic inspection of other critical components (e.g., brakes, suspension, chain) before purchasing.

2. **If you plan to use the bike for heavy motocross, long-distance adventure riding, or rough terrain**, consider upgrading to a larger displacement bike (e.g., KTM 250 SX-F or 350/450 Adventure) or a more robust dual-sport model. The AB345 s limitations in power and comfort may become frustrating over time.

3. **If you are experienced and willing to invest in upgrades**, the AB345 can be a fun project bike. Allocate funds for necessary repairs (e.g., axle hub, suspension, tires) and consider modifying it to better suit your riding style (e.g., adding a windshield, upgrading the exhaust, or improving suspension).

- Signs of frame damage or rust.

- Condition of the engine (oil leaks, compression, or unusual noises).

- Wear on the chain, sprocket, and rear axle.

- Suspension functionality (compression and rebound damping).

- Tire tread and overall condition.

5. **Compare prices** with other used KTM bikes in the same class (e.g., 125cc MX or dual-sport models) to ensure you are getting a fair deal. If the bike is priced significantly below market value, it may be worth the investment if the issues are minor.

**Final Verdict:** The KTM AB345 125 is a **good buy for the right rider** one who prioritizes fun, affordability, and versatility over extreme performance or long-term durability. If you are prepared for minor repairs and willing to upgrade as needed, it can be a rewarding purchase. However, if you need a bike for heavy-duty use or plan to ride extensively, consider a more capable model.

Details:

Item is being sold as. Buyers OUTSIDE THE USAA MUST CONTACT ME prior to sale. It is not new and I am trying to pass it off as such. Feel free to ask questions about its condition.

This part is used. Came off of a 1985 KTM 125. Small crack on manufacturers weld. I inspect them to the best of my ability.

No broken spokes.

part #: ab345 prices

• $50.32-$295.47

specifications cywhemo:

• for models: Mx, Mxc, 125
• for makes: Ktm
• for years: 2018
• mpn: Ab345
• part type: Wheel Axle Hub
• wheel width: 2.25
• country of origin: Austria

payments cywhemo:

• credit card: Visa
• wallet: Apple-pay
• other

shipping cywhemo:

• class: Standard
• transit: 4-7 Days
• service: UPS Ground
• type: Calculated
• cost: $27.39
• carrier: UPS

seller cywhemo:

• # reviews: 1705
• rating: 100.0%
• city: Cotter, Arkansas

offer cywhemo:

• started: March 19, 2026
• options: Ship-to-home
• quantity: 1
• availability: In Stock
• sold: 0

returns cywhemo:

• time: 30 Days
• policy: Returns Accepted
• paid by: Buyer

general cywhemo:

• Motorcycle Scooter Parts Accessories > Wheels, Tires Parts > Wheels Rims
• condition: Used

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