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  1. Trailer Lights
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  4. Round
  5. Incandescent Light
  6. Red
Optronics Single Face Trailer Tail Light - Stop, Turn, Tail - Round - Red Lens

Optronics Single Face Trailer Tail Light - Stop, Turn, Tail - Round - Red Lens

Item # ST51RB
Our Price: $13.70
Trailer Lights
Orders above $50 qualify for Free Shipping
Shipping Weight: 0.47 lbs
In Stock
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4-5/16" Diameter round. Incandescent trailer light functions as a stop, turn, and tail signal. Single face design has red lens. Single post pedestal mount. 2-Wire design. (1) 2057 bulb. Great Prices for the best trailer lights from Optronics. Optronics Single Face Trailer Tail Light - Stop, Turn, Tail - Round - Red Lens part number ST51RB can be ordered online at or call 1-800-496-5010 for expert service.
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  • Reviews (109)
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Optronics Trailer Lights - ST51RB

  • Tail Lights
  • Round
  • Incandescent Light
  • Red
  • 4-1/2 Inch Diameter
  • Pedestal Mount
  • Stop/Turn/Tail
  • Non-Submersible Lights
  • Optronics

4-5/16" Diameter round. Incandescent trailer light functions as a stop, turn, and tail signal. Single face design has red lens. Single post pedestal mount. 2-Wire design. (1) 2057 bulb.


  • Round incandescent trailer light serves 3 functions
    • Stop, turn, and tail
  • Single face design has single red lens
  • Incandescent 2057 bulb can be easily replaced
  • Durable polycarbonate snap-on lens and housing
  • Compatible with 12V DC systems
  • Single post pedestal mount
  • 2-Wire design includes power lead and ground wire


  • Dimensions: 4-5/16" diameter x 2-3/8" thick
  • Bolt diameter: 1/2"
  • Bulb type: 2057 bulb
  • Power draw at 12.8V:
    • Stop/turn: 2.3 amps
    • Tail: 1.2 amps
  • 3-Year warranty

Manufacturer Cross Reference
Light will work as an exact replacement for:
Wesbar # 2623
Truck Lite # 70310R
Grote # 55220
Peterson # 313-2
Bargman # 30-17-001

dimensions of light

ST51RB Optronics Single Face Trailer Tail Light - Stop, Turn, Tail - Round - Red Lens

Alternate part number: ST-51RB

California residents: click here

Customer Satisfaction Score:

Customer Reviews

Optronics Single Face Trailer Tail Light - Stop, Turn, Tail - Round - Red Lens - ST51RB

Average Customer Rating:  4.9 out of 5 stars   (109 Customer Reviews)

4-5/16" Diameter round. Incandescent trailer light functions as a stop, turn, and tail signal. Single face design has red lens. Single post pedestal mount. 2-Wire design. (1) 2057 bulb.


I was having difficulty locating this particular style brake light at my local auto parts store, but had no problem finding them at I have an oversize spare tire on my Jeep and use this style brake light as a replacement, as the stock third brake light was of no use. The website was easy to navigate, and shipping was fast.


Installed these lights on my trailer and they work perfect. This is the best price I found anywhere online for these lights.


Excellent light with a lot of different applications. I bought mine from etrailer because they are properly priced and efficiently take cate of the shipping and the customer.


Work very well


Quick service, correct parts, Thank you! DT


I have the lights mounted, but not connected yet. Should work well when completed. Pictures enclosed.


Works well. etrailer offers a lot of it ems


We ordered 2 (two) pedestal mount trailer lights from ETRAILER and found the price, the quality (so far) outstanding, not to mention the ease and service we received to be OUTSTANDING. I phoned and spoke to a George J - NOT an automated-foreign George J but a professional, courteous, helpful, and sincere English speaking customer service rep who answered all my questions promptly and without reservation. The total experience GRRRR-ATE. We would't hesitate to order from ETRAILER again. Steve and Barbara -Elmira, New York

Stephan - 06/20/2020


Nice inexpensive lights. I made a bracket to mount them to which goes into my trailer hitch on my tow car. When hooked to my motorhome i just put it in and plug in the wires. Very handy. Great job etrailer!!


The lights were easy to install on my small trailer and they work perfectly, but during a long trip one of the lens popped off and was lost. I guess it is not the most common light as I was not able to find a replacement on our trip. Other than the lens falling off, the product is good quality and worked well.

The replacement lenses are available as part # A52RB
Replacement Tail Light Lens for ST51RB and ST52RB - Red
linked below. We typically list these type of items in either replacement parts, or related items portion of our product page.
-- Etrailer Expert Rachael H - 08/19/2019


Fastest shipping I ever had from anywhere. Im in memphis TN. These lights are excellent quality and I am so happy I found this website because I couldnt find these cheaper anywhere. Thank you so much

Still works great!
Christopher M - 05/15/2016


Great little lights, great replacement lights. The only thing i had to research what color wire went with what part of the light function. But easily looked it up online. Would buy again

You know they are working like a champ. Now if we could find a durable 4 pin trailer to vehicle connection we would be set. We havent really thought about them, but that is not a bad thing cause they work.
Forrest - 01/24/2018


The light was easy to install. Grounding was a little hard to install.a ground washer would help. The light was installed in pvc.


Package arrived on time, protected well. Trailer lights are exactly as described , and exactly what I wanted .
Thanks so much .


Product was delivered as advertized and worked great on my sandrail project. Thanks again…


Super fast shipping as usual!
I installed
these lights on my hitch mounted motorcycle carrier because the motorcycle obstructs the lights on the back of my truck.
I had to watch the video to find out which wire was for the tail light and which was for the stop/turn, but that's the only problem I came across. Seem like a good pair of lights.


Perfect replacement for what existed on trailer before - preventing me from having to make modifications to adapt different style of lights. Quality appears to be good and lights have held up well I would buy again!


Replaces upper turn signal-stop-running lites on horse trailer. Could no longer find original but this is so close a match, no one would be able to tell the difference. The original is available on e-bay at a very steep price sold as "relic" or some such language.Your price was excellent. Have not installed lites. They are spares for when I rip the old ones off going through my orchard, duh?


they fit great and look great


Arrived promptly as expected. They installed easily and adapted to the trailer wiring without difficulty. After one year, they are still working well and the light is very bright. Excellent product.


The lights work perfectly on my 1950 Chevrolet 1/2 ton pickup. They have been mounted to the left & right vertical structural box members that anchor the tail gate chains. I'm very happy with the set up and how it works.


Well made trailer lights and wiring. Easy to install. Still working perfectly one year later. Fast shipping and well packaged too.


Excellent part easy to install


These took the place of an original set of tail lights on a truck bed trailer we built worked perfectly


I ordered 2 lights online, for my trailer. The lights were shipped promptly and arrived a few days later. Lights were in good condition and are well constructed. Installed the lights, tested them and worked as advertised.

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