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CURT 25128 straight-tongue coupler, zinc-plated steel, 1-7/8 inch ball, Posi-Lock latch

Curt Manufacturing

Curt Manufacturing 25128 Straight-Tongue Coupler with Posi-Lock 1-7/8 in

SKU CH-5SMK-0WPRM

Straight-tongue trailer coupler with Posi-Lock latch for 1-7/8 in ball, rated to 2,000 lb GTW, zinc-plated steel for corrosion resistance

  • TypeTrailer, Plow & Towing Equipment
  • ColorClear
  • Straight-tongue design fits Class I trailers
  • Posi-Lock mechanism secures the 1-7/8 in ball
  • Zinc-plated steel resists corrosion and wear
  • Rated for 2,000 lb gross towing weight
  • Weighs 2.75 lb for easy handling

Straight-Tongue Coupler for Class I Towing

The Curt Manufacturing 25128 is a straight-tongue trailer coupler designed for Class I vehicles. It accepts a 1-7/8 in hitch ball and fits a 2 in wide trailer tongue. The zinc-plated steel construction provides corrosion, tear and wear resistance for regular towing use.

Sustained Load Behaviour

Rated for a gross towing weight of 2,000 lb, the coupler maintains a secure connection through the Posi-Lock mechanism during continuous hauling. The steel body resists deformation under constant tension, while the clear zinc finish protects the locking components from road grime and moisture over long distances.

Thermals Noise and Power

As a passive mechanical component, the coupler generates no heat, noise or electrical draw during operation. The 2.75 lb zinc-plated steel assembly relies on its material properties and the Posi-Lock latch to stay secure without any powered actuation or cooling requirements.

Highlights

  • Straight-tongue design fits Class I trailers
  • Posi-Lock mechanism secures the 1-7/8 in ball
  • Zinc-plated steel resists corrosion and wear
  • Rated for 2,000 lb gross towing weight
  • Weighs 2.75 lb for easy handling

Specifications

BrandCURT
TypeTrailer, Plow & Towing Equipment
ColorClear

Questions about this item

How much current does the Curt 25128 draw when the trailer lights are on all day?

The Curt 25128 is a mechanical coupler with no electrical draw; it adds zero amperage to the lighting circuit.

What mounting hardware must I already have to bolt the Curt 25128 onto a 2 in tongue?

You need a 2 in wide trailer tongue and the bolts or weld required to fasten the coupler’s 8 7/8 in channel to that tongue.

Will the Curt 25128 accept the 1 7/8 in hitch ball already on my older tow vehicle?

Yes, the coupler is machined for a 1 7/8 in ball and its Posi-Lock latch secures that ball without modification.

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