---
product_id: 3593971
title: "Fit System 3891 Deluxe Universal Clip-on Trailer Towing Mirror"
brand: "fit system"
price: "€ 112.24"
currency: EUR
in_stock: true
reviews_count: 8
category: "Fit System"
url: https://www.desertcart.nl/products/3593971-fit-system-3891-deluxe-universal-clip-on-trailer-towing-mirror
store_origin: NL
region: Netherlands
---

# Dual ratchet lock mount 5"x8" extra-large mirror Tool-free clip-on install Fit System 3891 Deluxe Universal Clip-on Trailer Towing Mirror

**Brand:** fit system
**Price:** € 112.24
**Availability:** ✅ In Stock

## Summary

> 🛻 Tow with confidence—see more, stress less!

## Quick Answers

- **What is this?** Fit System 3891 Deluxe Universal Clip-on Trailer Towing Mirror by fit system
- **How much does it cost?** € 112.24 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.nl](https://www.desertcart.nl/products/3593971-fit-system-3891-deluxe-universal-clip-on-trailer-towing-mirror)

## Best For

- fit system enthusiasts

## Why This Product

- Trusted fit system brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Built to Endure:** Heavy-duty plastic construction delivers highway-speed stability and long-lasting durability.
- • **Effortless Setup:** Clip-on design installs in seconds without tools—no mirror removal needed, just clip and adjust.
- • **Rock-Solid Stability:** Dual ratcheting straps with rubber pads ensure vibration-free, secure attachment up to 11.5" tall mirrors.
- • **Maximized Rear Visibility:** Extra-large 5"x8" mirror head expands your field of view for safer towing and lane changes.
- • **Universal Fit & Trusted Quality:** Fits most cars, SUVs, and vans; backed by K Source’s professional-grade Fit System reliability.

## Overview

The Fit System 3891 Deluxe Universal Clip-on Trailer Towing Mirror features a large 5"x8" convex mirror for enhanced rear visibility, secured by dual ratchet straps that fit most factory mirrors up to 11.5" tall. Its tool-free clip-on installation and durable construction provide a stable, vibration-resistant towing experience, making it an essential upgrade for safe and confident towing on any vehicle.

## Description

Upgrade your towing setup with the K Source Fit System 3891 Deluxe Universal Clip-On Trailer Towing Mirror, the professional solution for extended rear visibility and maximum safety. Built with a large 5” x 8” mirror head and a secure ratchet locking system, it offers a stable, vibration-free view while towing trailers, boats, or campers. The clip-on design allows fast, tool-free installation on most vehicle mirrors, while the heavy-duty construction ensures reliable performance under all road and weather conditions. Backed by K Source’s trusted Fit System quality, this mirror delivers clear, stable, and durable visibility for confident towing every time.

Review: Not much vibration, CONVEX shape, Good overall bang for the buck - I just used these on a 1,200 mile trip picking up a small camper. I'm happy with their performance but here's a list of things I found important: - The mirrors are convex so the image they produce is smaller than the regular mirror on the drivers side and about the same as the one on the passenger side. This wasn't a problem for me - I liked the extra view but had to remind myself of the difference when backing up. I've attached an image to show the view they provide. - I have a Toyota 4Runner and the factory mirrors are tapered, getting thinner as you measure from inside to outside. These mirrors attached fine and held pretty well. They did gradually work their way towards the outer edge. It became noticeable after about 700 miles so I pulled over and reinstalled them. In the future I'm planning to place some silver duct tape on the factory mirror frame next to the inside strap clamp so as soon as the mirror starts to slip towards the outside there will be a gap between the tape and the mirror mount. - when installed I found one time the clamp that grabs the edge of the factory mirror wasn't properly gripping the frame even though when I had started it was properly in place. This means as I was adjusting the straps and tightening the ratchets it popped off. Just something to be aware of. Not a product flaw, just my inattention. - I expected them to work their way loose so I put a sturdy velcro strap around the base of my factory mirrors and then used zip ties to attach the mirrors to the strap. I figure if one did fall off I at least wouldn't loose it though I could end up dinging the paint on my 4Runner..... - My girlfirend is going to help me modify a velcro strap to secure the inner ratchet strap to the inside edge of the factory mirror frame. I'm thinking this may prevent the mirror creeping out and falling off. To sum this up - these mirrors worked great and allowed me to see around a wider camper. They need to be checked regularly just like you would check the hitch and lites regularly. Simple enough and I don't think I'll ever loose one, but if I do I'd be happy to get another one of these to replace it.
Review: Met my needs, it works. - I'm towing a 23' Forest River Ozark travel trailer with a 2018 Tacoma TRD Pro. I needed mirror extenders to see around the trailer but did not want permanent towing mirrors. These mirrors do work and met my needs at a budget friendly price. I noticed that you need to read the instructions and attach the mirrors as they explain or they will viberate some when driving. I set one up correctly and the other I did not, one wiggled while driving and the other didn't. It was important to keep the rubber block with the ratcheting mechanism in the center of the mirror you are attaching to ...that made the difference for me. They attached easily to my stock tacoma mirrors and left no damange or marks as far as I can tell when removed. The mirrors were very tight in their ball socket, making it a little hard to adjust, however I also think that makes these mirrors move amd viberate far less than others when driving. My only real complaint, price and all considered..... I wish they packaged these mirrors in packs of two....they are sold individually. They could be nicer, but then they would be more expensive and we all would complain more 😀 This is a good mix between quality, price, and functinality ...a sweet spot for someone in my circumstance.

## Features

- Extra-Large Viewing Area – Features a 5” x 8” mirror head that delivers wide and clear rear visibility for safer towing and lane changes.
- Secure Ratchet Lock Mount – Dual ratcheting straps firmly attach to most factory mirrors up to 11.5” tall, with rubber pads that prevent scratching or vibration.
- Easy Clip-On Installation – Installs quickly without tools; simply clip on and adjust for the perfect angle without removing your existing mirrors.
- Durable and Stable Design – Heavy-duty materials ensure long-lasting performance, maintaining stability even at highway speeds.
- Trusted K Source Quality – Designed by K Source’s Fit System line for professional-grade towing safety and reliable visibility on every trip.
- Includes one complete mirror assembly. Fits on Driver or Passenger side mirror

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B001AJH1HK |
| Auto Part Position | Outside |
| Best Sellers Rank | #108,108 in Automotive ( See Top 100 in Automotive ) #615 in Automotive Exterior Mirrors |
| Brand | Fit System |
| Brand Name | Fit System |
| Color | black |
| Compatible with Vehicle Type | Car, SUV, Van |
| Customer Reviews | 4.2 out of 5 stars 3,795 Reviews |
| Fit Type | Universal Fit |
| Global Trade Identification Number | 00759746389107 |
| Included Components | Mirror |
| Item Dimensions | 17.5 x 6.6 x 4 inches |
| Item Type Name | K-Source 3891 Towing Mirror Ratchet Mount |
| Item Weight | 1.5 Pounds |
| Item dimensions L x W x H | 17.5 x 6.6 x 4 inches |
| Manufacturer | K Source Inc. |
| Manufacturer Part Number | 3891 |
| Manufacturer Warranty Description | 1 Year Parts |
| Material | Plastic |
| Material Type | Plastic |
| Mounting Type | Universal Mount |
| Operation Mode | Manual |
| Other Special Features of the Product | Extra large mirror ,Reachet lock system |
| Shape | Rectangular |
| Size | Large |
| UPC | 759746389107 |
| Unit Count | 1.0 Count |
| Vehicle Service Type | Car, SUV, Van |

## Product Details

- **Auto Part Position:** Front
- **Item dimensions L x W x H:** 17.5 x 6.6 x 4 inches
- **Brand:** Fit System
- **Color:** black
- **Mounting Type:** Universal Mount
- **Included Components:** K-Source 3891 Towing Mirror Ratchet Mount
- **Special Feature:** Extra large mirror ,Reachet lock system
- **Item Weight:** 1.5 Pounds
- **Fit Type:** Universal Fit
- **Size:** Large

## Images

![Fit System 3891 Deluxe Universal Clip-on Trailer Towing Mirror - Image 1](https://m.media-amazon.com/images/I/512QlOml8hL.jpg)

## Questions & Answers

**Q: Is this a set of mirrors for the price or priced per mirror?**
A: Price is for one mirror...

**Q: Do you notice the wind noise this has when you're on the highway (say 60-75mph)?**
A: Several years ago I had a similar set of mirrors and they vibrated on this same vehicle.  This set fits great and does not vibrate, therefore I do not believe you will get any wind noise.  It hasn't been warm enough to have the windows down here yet this year.  Can't hear anything with the windows up.  With the ratchet system they fit extremely tight and I can't imagine them providing wind noise.

**Q: can these mirrors be turned horzontal or do they have to stay vertical**
A: They can be switched horizontal or vertical.  Loosen screw on the back and the mirror will come off to be repositioned vertical or horizontal.

**Q: Will this fit a 2016 Buick Encore?**
A: Yes, they are universal to any mirror

## Customer Reviews

### ⭐⭐⭐⭐⭐ Not much vibration, CONVEX shape, Good overall bang for the buck
*by S***R on March 24, 2021*

I just used these on a 1,200 mile trip picking up a small camper. I'm happy with their performance but here's a list of things I found important: - The mirrors are convex so the image they produce is smaller than the regular mirror on the drivers side and about the same as the one on the passenger side. This wasn't a problem for me - I liked the extra view but had to remind myself of the difference when backing up. I've attached an image to show the view they provide. - I have a Toyota 4Runner and the factory mirrors are tapered, getting thinner as you measure from inside to outside. These mirrors attached fine and held pretty well. They did gradually work their way towards the outer edge. It became noticeable after about 700 miles so I pulled over and reinstalled them. In the future I'm planning to place some silver duct tape on the factory mirror frame next to the inside strap clamp so as soon as the mirror starts to slip towards the outside there will be a gap between the tape and the mirror mount. - when installed I found one time the clamp that grabs the edge of the factory mirror wasn't properly gripping the frame even though when I had started it was properly in place. This means as I was adjusting the straps and tightening the ratchets it popped off. Just something to be aware of. Not a product flaw, just my inattention. - I expected them to work their way loose so I put a sturdy velcro strap around the base of my factory mirrors and then used zip ties to attach the mirrors to the strap. I figure if one did fall off I at least wouldn't loose it though I could end up dinging the paint on my 4Runner..... - My girlfirend is going to help me modify a velcro strap to secure the inner ratchet strap to the inside edge of the factory mirror frame. I'm thinking this may prevent the mirror creeping out and falling off. To sum this up - these mirrors worked great and allowed me to see around a wider camper. They need to be checked regularly just like you would check the hitch and lites regularly. Simple enough and I don't think I'll ever loose one, but if I do I'd be happy to get another one of these to replace it.

### ⭐⭐⭐⭐ Met my needs, it works.
*by Q***E on March 29, 2024*

I'm towing a 23' Forest River Ozark travel trailer with a 2018 Tacoma TRD Pro. I needed mirror extenders to see around the trailer but did not want permanent towing mirrors. These mirrors do work and met my needs at a budget friendly price. I noticed that you need to read the instructions and attach the mirrors as they explain or they will viberate some when driving. I set one up correctly and the other I did not, one wiggled while driving and the other didn't. It was important to keep the rubber block with the ratcheting mechanism in the center of the mirror you are attaching to ...that made the difference for me. They attached easily to my stock tacoma mirrors and left no damange or marks as far as I can tell when removed. The mirrors were very tight in their ball socket, making it a little hard to adjust, however I also think that makes these mirrors move amd viberate far less than others when driving. My only real complaint, price and all considered..... I wish they packaged these mirrors in packs of two....they are sold individually. They could be nicer, but then they would be more expensive and we all would complain more 😀 This is a good mix between quality, price, and functinality ...a sweet spot for someone in my circumstance.

### ⭐⭐⭐⭐⭐ Great product
*by B***N on October 21, 2013*

I recently purchased 2 of these for use with my Xterra and I am very happy with them. I only have one trip under my belt using them but the last set of mirrors I purchased were returned before the trip, so... I previously borrowed a family members Milenco Aero 2 towing mirror and I really liked those. Their no strap design was quite slick and worked well. That being said buying 2 of the Fit System 3891 towing mirrors is still less then just one of the Milenco mirrors. So whats the difference? Attachment Method: Milenco wins. It is just so simple to clamp on and go. The Fit System ratchet straps worked just fine and held great on my Xterra. They do take a bit more time to get setup and adjusted. What you can see: Tie. Both have a great view and are large enough to see whats going on behind you Vibration: Fit Systems wins. There was hardly any vibration when towing. The Milenco mirrors weren't bad but the Fit Systems mirrors were noticeably more stable. Price: Fit Systems - Enough said... Overall I think the Fit Systems mirrors are great and I am happy with my purchase.

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*Product available on Desertcart Netherlands*
*Store origin: NL*
*Last updated: 2026-02-16*