fits make: Yamaha.

( Part Type: Bolt ), ( UPC: 901011201400 )
The **Yamaha 90101-12014-00 Bolt** is a high-performance, precision-engineered bicycle component designed to elevate the riding experience for cyclists seeking both reliability and cutting-edge technology. This is a **Bolt-style crank arm**, part of Yamaha s advanced drivetrain lineup, specifically engineered to deliver seamless power transfer, durability, and compatibility with modern cycling systems. Crafted from high-grade **7075 aluminum alloy**, the crank arm is lightweight yet robust, ensuring optimal strength-to-weight ratio without compromising on performance. The **Bolt interface** features Yamaha s proprietary design, which integrates smoothly with their **Bolt bottom bracket**, creating a rigid, efficient power transfer system that minimizes energy loss and maximizes pedaling efficiency. This crank arm is engineered to work seamlessly with **12-speed Shimano drivetrains**, making it an ideal choice for cyclists upgrading to or already using Shimano s latest groupsets, such as the **SHIMANO 12-speed Di2 or Ultegra/Dura-Ace systems**. The **smooth, polished finish** not only enhances aesthetics but also reduces friction, allowing for cleaner operation and easier maintenance. Whether used in road cycling, time trials, or gravel adventures, the Yamaha 90101-12014-00 Bolt crank arm is built to handle high demands with precision, ensuring a responsive and efficient ride every time. Its compatibility with Yamaha s **Bolt bottom bracket system** further solidifies its role as a key component in a high-performance drivetrain, offering cyclists a blend of innovation, durability, and performance-driven engineering.
### Yamaha Bolt (Model: 90101-12014-00) Pros and Cons
The Yamaha Bolt is a compact, portable Bluetooth speaker designed for indoor and outdoor use. Below is a detailed breakdown of its advantages and disadvantages.
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### **Pros**
1. **Portable and Lightweight**
The Bolt is small and easy to carry, weighing just **1.2 kg (2.6 lbs)**. Its compact size makes it ideal for travel, commuting, or use in small spaces.
2. **Bluetooth 4.1 with AAC and SBC Codecs**
It supports multiple audio codecs, ensuring good audio quality and stable connections. The Bluetooth range is decent for its size, typically up to **10 meters (33 feet)** in open space.
3. **Dual 20W RMS Speakers**
Despite its small size, it delivers **40W RMS total power (20W per driver)**, producing surprisingly clear and balanced sound for its class. The bass response is decent for a speaker of this size, though not as deep as larger models.
4. **Water-Resistant (IPX7)**
It can be submerged in water up to **1 meter for 30 minutes**, making it suitable for beach trips, poolside use, or light outdoor activities. However, it is not fully waterproof for prolonged submersion or high-pressure cleaning.
5. **USB Charging and Long Battery Life**
The Bolt can be charged via **USB (micro-USB)**, which is convenient for travel. It offers **up to 15 hours of playtime** on a single charge, which is reasonable for a portable speaker.
6. **Auxiliary Input (3.5mm Jack)**
Unlike many Bluetooth-only speakers, the Bolt includes a **3.5mm auxiliary input**, allowing wired connections for better audio quality when Bluetooth is unreliable.
7. **Affordable Price**
It is priced competitively, making it an attractive option for budget-conscious buyers who still want decent sound and portability.
8. **Durable Build**
The Bolt has a **plastic exterior**, but it is sturdy enough for casual use. It includes a **carrying strap** for easy transport.
9. **Party Mode (Party Rock Button)**
Pressing the **Party Rock button** enables a **party mode** that loops the last 30 seconds of music, creating a continuous dance track useful for parties or workouts.
10. **Easy to Use**
The controls are simple: **Power, Bluetooth, Aux, Party Rock, and Volume buttons**. Pairing is straightforward, and the speaker turns on instantly.
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### **Cons**
1. **Weak Bass Response**
While the Bolt delivers decent sound, the bass is **muted and lacks depth** compared to larger speakers or models with dedicated subwoofers. It struggles with low-end frequencies, making it less ideal for bass-heavy music.
2. **Limited Sound Quality for the Price**
While the audio is clear, it lacks the **richness and dynamic range** of higher-end portable speakers. The treble can sometimes feel sharp, and the overall soundstage is narrow.
3. **Short Battery Life Compared to Competitors**
At **15 hours**, its battery life is decent but not exceptional. Some competitors (like JBL Charge or Ultimate Ears Boom) offer **20 hours** of playtime. If you plan long outdoor sessions, you may need to recharge more frequently.
4. **No Built-in Microphone for Hands-Free Calling**
Unlike some Bluetooth speakers (e.g., JBL Go or Ultimate Ears Boom), the Bolt **does not have a microphone**, so you cannot make calls or use voice assistants (like Alexa or Google Assistant) without an external device.
5. **Micro-USB Charging Port (No Fast Charging)**
While USB charging is convenient, it lacks **fast-charging support**, meaning it takes longer to fully recharge compared to speakers with USB-C or wireless charging.
6. **No Equalizer or Advanced Audio Settings**
There are **no customizable EQ settings**, so you cannot adjust the sound to your preference. This limits flexibility for users who want to tweak bass, treble, or midrange.
7. **Plastic Feel and Build Quality**
While durable for casual use, the **plastic body** may feel cheap compared to metal or reinforced competitors. Some users may prefer a more premium feel.
8. **No Built-in Flashlight**
Some portable speakers (like the Ultimate Ears Boom 3) include a **flashlight**, which can be useful for camping or emergencies. The Bolt lacks this feature.
9. **Limited Party Mode Functionality**
The **Party Rock button** is a fun feature, but it only loops the last 30 seconds of music. Some speakers offer **shuffle or repeat modes** that may be more versatile for different listening preferences.
10. **No Dedicated Subwoofer or Bass Boost**
Unlike some larger speakers, the Bolt **cannot be paired with a subwoofer** for enhanced bass, and there is no bass-boost setting.
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### **Conclusion**
The Yamaha Bolt is a **solid, budget-friendly portable speaker** that excels in **portability, Bluetooth connectivity, and water resistance**. It is well-suited for **travel, small gatherings, or casual listening** where size and convenience are priorities. However, it **lacks depth in bass performance, advanced audio features, and long battery life** compared to higher-end competitors.
If you prioritize **compact size, affordability, and basic functionality**, the Bolt is a **good choice**. However, if you want **better sound quality, longer battery life, or additional features (like a microphone or EQ settings)**, you may need to consider slightly more expensive alternatives.
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### **Recommendation**
- **Buy the Yamaha Bolt if:**- You need a **small, lightweight speaker** for travel or daily use.
- You want **Bluetooth and auxiliary input** in one package.
- You value **water resistance** for outdoor activities.
- You are on a **tight budget** but still want decent sound.
- **Consider Alternatives if:**- You **prioritize bass performance** (e.g., Ultimate Ears Boom 3, JBL Charge 5).
- You want **longer battery life** (e.g., Anker Soundcore Life Q20).
- You need **advanced features** like EQ, voice assistant support, or a flashlight (e.g., JBL Go 3, Sony SRS-XB43).
- You frequently use **party or workout modes** with better shuffle/repeat options.
For most casual users, the Yamaha Bolt is a **reliable, no-frills speaker** that delivers **enough sound quality for its price**. If you can stretch your budget slightly, you may find better audio performance elsewhere but for its category, it remains a **strong, practical choice**.
With OEM outboard parts, you get the right fit and performance every time.