BOSCH BOS-21CA 21" Beam Wiper Blade, Clear Visibility, Single
Streak-Free Performance - Bosch Beam Wiper Blades (21CA)
All-Weather Windshield Wipers with Graphite Coating
Tired of streaky windshields that compromise your visibility? This Bosch beam wiper blade solves the most common problems with traditional windshield wipers. The 21-inch Clear Advantage blade uses advanced beam technology to eliminate streaking, chattering, and uneven wear that frustrates drivers during rain, snow, and sleet.
Key Features and Benefits
Superior All-Weather Performance
Patented beam design reduces exposed metal components, preventing ice and snow buildup that can damage traditional bracket-style wipers. The precision-tensioned spring applies uniform pressure across the entire blade length.
Quiet, Streak-Free Operation
Graphite-treated natural rubber wiping edge reduces friction and noise while delivering consistent, clean wipes. No more annoying squeaking or jerky movements across your windshield.
High-Speed Stability
Built-in aerodynamic wind spoiler creates downforce to prevent blade lift-off during highway driving. Maintains consistent windshield contact even in crosswinds and storms.
| Feature | Benefit |
|---|---|
| Clear Advantage Technology | Bosch's proprietary Clear Advantage beam technology combines precision-molded graphite-treated rubber with optimized aerodynamic geometry to deliver superior wiping performance across curved windshields found on modern vehicles. This advanced engineering ensures consistent contact and pressure distribution while reducing wear patterns that cause conventional wipers to leave streaks and miss spots over time, providing lasting clear visibility in rain, snow, sleet, and everyday driving conditions. |
| Aerodynamic Wind Spoiler | Built-in aerodynamic spoiler creates controlled downforce that prevents dangerous blade lift-off at highway speeds, maintaining optimal windshield contact during high-speed driving and crosswind conditions. This wind-resistant design eliminates the chattering and streaking that occurs when conventional wipers lose contact with the glass surface, ensuring reliable visibility even in challenging weather situations and severe storm conditions. |
| Precision-Tensioned Steel Spring | Internal precision-tensioned steel spring distributes consistent pressure across the entire 21-inch blade length, eliminating pressure points that cause premature wear and uneven wiping patterns on curved windshields. This advanced engineering ensures the blade maintains proper curvature to match your windshield contour while providing uniform contact that conventional bracket-style wipers cannot achieve, resulting in superior cleaning performance and extended operational life. |
| Universal Click-On System | Pre-mounted universal adapter system accommodates multiple wiper arm styles including hook arms, pin arms, side locks, top locks, and BMW-specific connections without requiring additional hardware or specialized tools. The secure click-on installation takes seconds to complete while ensuring proper blade alignment and preventing detachment during operation, making replacement simple for any driver regardless of technical experience or mechanical knowledge. |
| Graphite-Coated Rubber Edge | Premium graphite treatment on the natural rubber wiping edge significantly reduces friction against windshield glass, eliminating squeaking, chattering, and juddering sounds while extending operational life substantially beyond untreated rubber blades. This specialized coating ensures smooth, quiet operation across all temperatures and weather conditions, maintaining consistent performance even when rubber becomes stiff in freezing cold weather environments and extreme temperature variations. |
Perfect Applications for Bosch Beam Wiper Blades
- Daily commuting in rain, sleet, or snow
- Highway driving where wind resistance matters
- Replacing worn OEM blades with better durability
- Vehicles with curved windshields that need consistent contact
- Fleet maintenance requiring dependable performance
- All-weather driving in harsh climate conditions
| Specification | Value |
|---|---|
| Part Number | 21CA (BOS-21CA) |
| Blade Length | 21 inches |
| Blade Type | Beam Design |
| Material | Natural Rubber with Graphite Coating |
| Installation | Click-On Adapter System |
| Quantity | Single Wiper Blade |
| Frame Color | Black |
| Technology | Clear Advantage beam design |
| Weather Rating | All-season performance |
Get Clear Visibility with Professional-Grade Beam Wiper Blades
Don't let poor visibility compromise your safety. This Bosch beam wiper blade delivers the streak-free performance and durability you need for confident driving in any weather condition.
Order your replacement wiper blade today and experience the difference quality makes.
Frequently Asked Questions
How does this compare to conventional wiper blades?
Beam wiper blades outperform conventional bracket-style wipers in several key ways. The one-piece design eliminates exposed metal joints that can freeze or corrode, while the continuous pressure distribution prevents streaking and skipping. You'll get quieter operation, better contact on curved windshields, and longer blade life.
Will this fit my vehicle?
This 21-inch blade fits most vehicles that use 21" front or rear wipers. The included Click-On adapter system works with hook, pin, and top-lock wiper arms. Check your owner's manual or measure your current blade to confirm the correct size before ordering.
How long do these wiper blades typically last?
Bosch beam wiper blades are designed for extended service life, typically lasting 6-12 months depending on usage and weather conditions. The graphite coating helps reduce friction and wear, while the durable rubber compound resists cracking and splitting better than standard wiper blades.
What's the difference between Bosch Clear Advantage and other Bosch wiper lines?
Clear Advantage offers high-quality beam performance at an excellent value. While Bosch ICON provides premium features like dual rubber compounds, Clear Advantage delivers reliable all-weather performance with graphite coating and aerodynamic design at a more accessible price point.
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