Description
⚙️ 4" Extension Spring Pulley – 3/8" Bore | 200 lb High-Cycle Rating
Built for strength, durability, and longevity, this 4-inch extension spring pulley is the perfect upgrade or replacement for high-cycle garage door systems. Designed with a larger 4" diameter and a 3/8" bore, it delivers smoother cable movement and better tracking—especially on taller or heavier residential and commercial doors.
Rated for 200 lbs at 35,000 cycles on a 12-ft high door, this pulley is ideal for demanding setups where long service life and consistent performance are critical.
✅ Key Features:
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4-Inch Pulley Diameter – Improves cable tracking and reduces wear
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3/8" Bore – Compatible with most standard garage door shafts
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200 lb Rating @ 35,000 Cycles – Built for high-cycle performance on taller doors
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Extension Spring System Compatibility – Optimized for smooth spring operation
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Heavy-Duty Construction – Reliable and durable under demanding use
📦 What’s Included:
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1x 4" Pulley with 3/8" Bore
🛠 Whether you're upgrading a failing part or building a new setup, this high-performance pulley delivers strength, smooth operation, and extended reliability for your extension spring system.
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