Lawn Mower Deck Belt 5/8" x 149 1/2" Fits for KUBOTA K5579-36710 RCK48P - Aramid Cord Belt

What It Is

This is a 5/8" wide, 149 1/2" long aramid cord deck belt designed to drive the mower blades on Kubota zero-turn mowers with a 48-inch RCK48P deck. It replaces OEM part number K5579-36710.

Fitment & Compatibility

Before buying, verify three things:

• Deck size: This belt fits Kubota 48-inch decks (RCK48P model). It will not fit 54" or 60" decks.
• Model cross-reference: Confirm your mower uses OEM part K5579-36710. This aftermarket belt is a direct replacement for that number.
• Measurements: The belt is 5/8" wide and 149.5" long. Measure your old belt (laid flat, not stretched) to confirm length. Slight variations (e.g., 149" vs. 150") can cause slipping or poor engagement.

Key Things to Know

• Aramid cord vs. standard: Aramid (Kevlar-type) belts handle higher heat and load than rubber-only belts, but they can be stiffer and more prone to cracking if tensioned too tightly.
• Installation difficulty: Moderate. You’ll need to remove the deck, route the belt around pulleys and idlers, and re-tension. A belt diagram is essential (check your manual or online).
• Ratings note: The 3.2/5 average review score may reflect inconsistent fit on some decks—measure your old belt first. Some users report premature wear if the deck is not perfectly aligned.
• No warranty from brand: This is an aftermarket “Deck” brand belt; not backed by Kubota. If exact OEM fit is critical, consider the genuine part.

Should You Buy It

Buy this if you have a Kubota RCK48P deck, need a budget-friendly replacement, and are comfortable with some installation trial-and-error. Skip it if you want guaranteed OEM fitment, have a different deck size, or prefer a belt with a stronger warranty.