Caltric Transmission Belt Compatible with John Deere La140 La145 La150 La155 La165 La175 S240

What It Is

The Caltric Transmission Belt connects the engine to the hydrostatic transmission on select John Deere lawn tractors, enabling forward and reverse drive. Designed as a direct replacement for the OEM belt, it’s for riders with 42-inch to 48-inch decks from the LA100 series and the S240.

Fitment & Compatibility

Before buying, confirm your mower model and deck size. This belt fits John Deere LA140, LA145, LA150, LA155, LA165, LA175, and S240 tractors with 42-inch or 48-inch decks. Measure your existing belt length (OEM part numbers include M155066, M156040, M160738, M161487, or M165282). The Caltric belt is 1/2 inch wide and approximately 94.1 inches long. Cross-check the OEM number on your old belt or your mower’s parts diagram—don’t rely solely on model name. If your deck size or belt length differs, this belt won’t fit.

Key Things to Know

• Quality: Caltric belts are aftermarket but match OEM specs. Users report good durability for residential use, but high-hour or commercial mowing may wear them faster than a genuine John Deere belt.
• Installation difficulty: Moderate. You’ll need to remove the mower deck, release belt tension via the idler pulley, and route the belt around the transmission pulley and deck pulleys. A belt routing diagram is recommended.
• Common gotchas: Check for worn pulleys or debris before installing—a seized idler or rough pulley will shred a new belt quickly. The belt may feel tight at first; double-check the routing path to avoid twisting.
• Price vs. OEM: At $15, it’s about half the cost of a John Deere belt. The savings are real, but expect slightly less longevity in heavy use.

Should You Buy It

Buy this Caltric belt if you need a budget-friendly replacement for a residential John Deere LA100-series or S240 tractor and you’re comfortable with a moderate DIY install. It’s a solid value for light-to-medium mowing, but if you mow multiple acres weekly or want maximum belt life, consider the genuine John Deere belt instead.