2021 International LT Wiper Blade Sizes & Replacement Guide

Keeping the windshield of your 2021 International LT clear is crucial for safe operation, whether you are hauling freight across the country or navigating local delivery routes. Finding the right wiper blade sizes and knowing how to install them properly can save you time and money, ensuring you have maximum visibility in rain, sleet, or snow.

Quick reference

Here are the wiper blade specifications for the 2021 International LT. Please note that as a heavy-duty commercial truck, the International LT does not feature a rear wiper.

Note: Heavy-duty commercial trucks frequently use standard commercial J-hook or saddle attachments. We recommend verifying exact OEM part numbers with your fleet manager or local International dealership to avoid aftermarket fitment issues.

Best aftermarket replacements

If you are looking to upgrade from the standard factory wiper blades, there are several premium aftermarket options that offer excellent durability and streak-free performance. Here are some of the most popular replacements across different price tiers:

• Bosch ICON: (Premium tier) Known for its dual rubber compound and exclusive tension spring arcing, making it exceptional in high winds and heavy rain.
• Rain-X Latitude: (Premium tier) Features a water-repelling coating that is applied to your windshield as the blades wipe, improving wet-weather visibility.
• PIAA Si-Tech: (Premium tier) Uses silicone rubber to promote continuous water beading and reduce noise.
• Michelin Stealth: (Mid-tier) A hybrid blade that combines the durability of a traditional frame with the aerodynamic cover of a beam blade.
• Trico Force: (Mid-tier) An aerodynamically designed beam blade engineered specifically to combat wind lift at highway speeds.

Attachment style

The 2021 International LT generally utilizes a standard J-hook attachment for its wiper blades. This is one of the most common and universally supported wiper arm styles, making it incredibly easy to find compatible aftermarket replacements at almost any auto parts store or truck stop.

How to install

Replacing the wiper blades on your International LT is a straightforward process. Follow these generic steps to install your new J-hook wipers:

1. Lift the wiper arm: Pull the wiper arm away from the windshield until it locks into a standing position. Be careful not to let the bare metal arm snap back onto the glass, as it can crack the windshield.
2. Remove the old blade: Locate the small tab or button where the blade meets the J-hook. Press or lift the tab, and slide the blade down toward the base of the wiper arm to release it from the hook.
3. Attach the new blade: Position the new wiper blade so the J-hook on the arm slides securely into the blade’s mounting bracket.
4. Listen for the click: Pull the blade upward until you hear a distinct "click," ensuring the blade is locked firmly in place.
5. Lower the arm: Gently lower the wiper arm back onto the windshield. Repeat the process for the other side.

When to replace

For optimal safety and visibility, industry experts recommend replacing your wiper blades every 6 to 12 months. However, because commercial trucks often endure higher mileage and harsher environmental conditions, you may need to replace them more frequently. Keep an eye out for these tell-tale signs of wear:

• Streaking or smearing across the windshield.
• Chattering or squeaking noises during operation.
• Skipping over sections of the glass.
• Visible cracks, tears, or stiffening of the rubber squeegee.

Need wipers swapped fast? Find a shop on Repairius.