
A trailer coupler is the connection point mounted on the trailer which connects the trailer to the vehicle. When replacing a coupler there a few things that you have to know. First, what is the hitch ball size for the coupler. Secondly, what type of trailer do you have, Straight Tongue or A-Frame? Lastly, what is the Gross Trailer Weight of the Trailer. These are the basic questions for a trailer coupler replacement.
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| Trailer Class |
Trailer Ball Size |
Channel Width |
Part# | Price |
| Class I- Up To 2,000 lbs. | 1-7/8" | 2" | 21127 | $13.90 |
| 1-7/8" | 2-1/2" | 21227 | $14.90 | |
| 1-7/8" | 3" | 21327 | $15.90 | |
| Class II - Up To 3,500 lbs. | 2" | 2" | 21128 | $15.90 |
| 2" | 2-1/2" | 21228 | $16.90 | |
| 2" | 3" | 62200 | $17.90 |
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Repair kit for Fulton couplers listed above. Class I – 1 1 78" Ball Coupler Repair Kit Part# 26127 $12.90 each Class II – 2" Ball Coupler Repair Kit Part# 26228 $12.90 each |
Bulldog weld on forged couplers are relied upon by leading trailer manufacturers for maximum strength and durability.

| Part # | Description | Price |
| 21000 |
Bulldog Straight Channel coupler for 2" ball with 3" square channel
5000 lbs High profile latch |
$53.90 |
| 21001 |
Bulldog Straight Channel coupler for 2" ball with 3" square channel 7000 lbs High profile latch |
$59.90 |
| 21002 |
Bulldog Straight Channel coupler for 2 5/16" ball with 3" square
channel 12,500 lbs High profile latch |
$68.90 |

| Part # | Description | Price |
| 21010 | Bulldog
A-Frame coupler for 2" ball 50 degree A-Frame 5000 lbs High profile latch |
$55.90 |
| 21011 | Bulldog
A-Frame coupler for 2" ball 50 degree A-Frame 7000 lbs High profile latch |
$61.90 |
| 21012 | Bulldog
A-Frame coupler for 2 5/16" ball 50 degree A-Frame 12,500 lbs High profile latch |
$69.90 |
![]() Universal Trailer Coupler LockThe Trimax UMAX 100 features an exclusive design that provides 360 degrees of hardened steel protection for your unattended trailer. Provides instant security for your camper, boat or trailer when they are not hooked up to your vehicle. |
![]() Hitch Receiver & Coupler Lock SetKeyed alike for your class 3,4 tow vehicle and trailer. Stainless steel construction. |
![]() Hockey Puck LockThe THP1 hockey puck trailer door lock has a 3/8" diameter internal shackle. Re-Keyable. Hasp sold separately. |
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