2018 Freightliner Cascadia — Wiper Blade Sizes

Quick reference

Note: The 2018 Freightliner Cascadia typically uses two 24-inch front blades. Heavy-duty arms often use a 1/2-inch J-hook. Always verify the arm style on your truck before purchase.

Best aftermarket replacements

These are well-proven all-weather beam or hybrid blades available in 24-inch size. Expect to buy two of the same size for the Cascadia:

• Bosch ICON (beam) — premium, roughly $25–35 per blade. Excellent longevity and winter performance.
• Rain-X Latitude (beam) — mid-to-premium, about $20–30. Good wipe quality and easy adapters.
• Trico Force (beam) — midrange, about $22–32. Aerodynamic spoiler helps at highway speed.
• Michelin Stealth (hybrid) — value-to-mid, about $18–28. Durable frame with beam-style rubber.
• PIAA Si-Tech (beam) — premium, about $30–45. Silicone refill leaves water-repellent film over time.

Tip: Many consumer blades include multiple adapters. For heavy-duty J-hook (1/2-inch), use the larger J-hook adapter in the package. If your arm is not a J-hook, choose a blade labeled for “HD/Commercial” fitment or use a dedicated heavy-duty adapter.

Attachment style

Most 2018 Cascadia tractors are equipped with a large 1/2-inch J-hook arm. However, fleet or region-specific builds can appear with other commercial attachments:

• J-hook (large 1/2 in): Most common; looks like a big curved hook at the arm end.
• Side pin: A pin passes through the blade saddle; less common on this model year.
• Bayonet: Flat tab that slides into a matching slot on the blade.
• Push-button: More typical on light vehicles; occasionally seen on retrofit arms.

Visually confirm your arm before purchasing. If unsure, remove one blade and take it to the counter, or match using the adapter diagrams on the blade packaging.

How to install

1. Park safely, key off, and set the parking brake. If equipped, switch wipers to “service” position or gently lift the arms from the glass.
2. Support the arm so it doesn’t snap back onto the windshield.
3. For J-hook: Press the locking tab on the old blade, slide the blade down toward the hook opening, then off the arm.
4. Select the correct adapter (large J-hook for 1/2-inch arms). Slide the new blade onto the hook until it clicks and locks.
5. Gently lower the arm to the glass.
6. Repeat on the other side, ensuring both sides are the same 24-inch length.
7. Test on washer spray to confirm secure attachment and streak-free wipe.

Unusual attachments: For side pin or bayonet arms, follow the adapter’s insert-and-lock procedure shown in the blade’s instructions. Never force-fit; use the correct adapter.

When to replace

Replace wiper blades every 6–12 months, or sooner if you notice:

• Streaking, smearing, or missed areas
• Chattering or judder at highway speeds
• Split or torn rubber, or bent frames
• Excessive noise or skipping in light rain

Fresh blades protect your windshield and improve visibility, especially critical for long-haul and night driving.

Need wipers swapped fast? Find a shop on Repairius.