BOSCH BOS-21CA-5 21 Inch Windshield Wiper Blades (5 Pack), Clear Advantage
Streak-Free Performance - BOSCH Clear Advantage Windshield Wiper Blades (21CA, 5-Pack)
Best Windshield Wiper Blades for Streak-Free Visibility
Stop dealing with streaky windshields and chattering wipers. These BOSCH Clear Advantage 21-inch windshield wiper blades deliver the consistent, quiet performance you need when visibility matters most. This 5-pack gives you enough replacements for multiple vehicles or keeps you stocked for the season.
Key Features and Benefits
No More Streaks or Chattering
Patented beam technology applies even pressure across entire blade length. Graphite-treated rubber edge glides smoothly for whisper-quiet operation. Eliminates skipping and noise that plague traditional frame wipers.
Stays Put at Highway Speeds
Built-in aerodynamic spoiler creates downforce for firm windshield contact. Maintains performance at high speeds and in crosswinds. Prevents lift-off when visibility is most critical.
Quick Installation on Most Vehicles
Pre-mounted Click-On adapter system fits most hook-arm and pinch-tab wiper arms. Tool-free installation takes seconds, not minutes. Compatible with multiple wiper arm types for universal fitment.
| Feature | Benefit |
|---|---|
| Beam Design Technology | Advanced frameless construction provides uniform pressure distribution across the entire 21-inch blade length, eliminating the uneven contact and streaking common with traditional bracket-style wiper blades. The continuous pressure ensures optimal windshield contact on both flat and curved surfaces, delivering superior cleaning performance in light drizzle through heavy downpours while maintaining consistent visibility throughout the complete wiping cycle for enhanced driving safety and accident prevention during adverse weather conditions. |
| Graphite-Treated Rubber | Premium natural rubber enhanced with graphite treatment significantly reduces friction between blade and windshield glass, preventing annoying squeaking and chattering sounds while extending blade lifespan considerably beyond standard wiper blades. The graphite coating maintains rubber flexibility and performance in extreme temperatures from -40°F to 120°F, ensuring reliable year-round operation whether facing freezing winter storms or scorching summer heat that would compromise standard rubber compounds and cause premature failure in harsh conditions. |
| Aerodynamic Spoiler Design | Integrated wind spoiler engineering creates essential downward force at highway speeds above 55 mph, preventing dangerous blade lift-off that can occur with traditional wipers during high-speed driving. The spoiler maintains firm windshield contact during crosswinds and turbulent conditions, ensuring consistent wiping performance when visibility is most critical for safe driving and accident prevention on highways, busy roads, and during severe weather events when clear sight lines become paramount for vehicle control. |
| Universal Click-On System | Innovative adapter technology provides secure attachment to multiple wiper arm configurations including Hook, Pin, Side Lock, Top Lock, and BMW systems manufactured after 1990. The tool-free installation eliminates guesswork and compatibility concerns while ensuring proper fitment across diverse vehicle types, making these blades an ideal solution for multi-vehicle households, fleet operations, and professional automotive service centers requiring reliable parts inventory and quick turnaround times for customer satisfaction. |
Perfect Applications for BOSCH 21-Inch Wiper Blades
- Multiple vehicle maintenance - fleet owners and multi-car households
- Highway driving where aerodynamics matter
- Rainy climates that demand consistent all-weather performance
- Curved windshields that require even pressure distribution
- Quiet operation for luxury vehicles or noise-sensitive drivers
- Professional auto shops needing reliable inventory for customer service
| Specification | Value |
|---|---|
| Blade Length | 21 inches (533mm) |
| Pack Size | 5 individual blades |
| Blade Type | Beam (frameless) design |
| Installation Type | Click-On adapter system |
| Compatible Arms | Hook, pinch-tab, and most wiper arms |
| Part Numbers | 21CA, 89696, 21-CA |
| Material | Graphite-treated natural rubber |
| Temperature Range | -40°F to 120°F Operating Range |
| Installation Time | Under 5 minutes per blade |
| Expected Lifespan | 6-12 months typical use |
Get Professional Wiper Blade Performance Today
Don't let poor visibility put you at risk. These BOSCH Clear Advantage windshield wiper blades deliver the streak-free, quiet performance you need for safe driving in any weather condition.
Order your 5-pack now and experience the difference quality makes.
Frequently Asked Questions
Which windshield wiper blades are best for my vehicle?
These 21-inch BOSCH Clear Advantage blades work with most vehicles that use 21 inch wipers. Check your current blade size or consult your owner's manual. The Click-On adapter system fits hook-arm, pinch-tab, and most standard wiper arm types.
How does this compare to traditional frame wiper blades?
Unlike traditional frame wipers that have multiple pressure points, these beam-style blades apply consistent pressure across the entire length. This eliminates streaking, reduces noise, and provides better performance on curved windshields without the ice buildup problems of frame wipers.
How long do these wiper blades typically last?
BOSCH Clear Advantage blades typically last 6-12 months depending on climate and usage. The graphite-treated rubber resists wear better than standard rubber, and the beam design maintains consistent contact longer than traditional frame wipers.
Can I install these windshield wiper blades myself?
Yes, installation is designed to be quick and tool-free. The pre-mounted Click-On adapter clicks directly onto your existing wiper arm. Most people can replace both blades in under 5 minutes with no mechanical experience required.
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