Color | Black |
---|---|
Brand | ThreeH |
Material | Aluminum |
Item Weight | 300 Grams |
Product Dimensions | 21.26"L x 3.94"W x 7.09"H |
Mounting Type | Rear Seat Mount |
Load Capacity | 110 pound |
Orientation | Rear |
Manufacturer | ThreeH |
UPC | 661021692843 |
Item Package Dimensions L x W x H | 21.26 x 6.61 x 3.7 inches |
Package Weight | 0.96 Kilograms |
Item Dimensions LxWxH | 21.26 x 3.94 x 7.09 inches |
Brand Name | ThreeH |
Part Number | H-BK43 |

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ThreeH Bicycle Rear Rack Adjustable Aluminum Alloy Bike Rack with Reflector BK431
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Return this item for free
We offer easy, convenient returns with at least one free return option: no shipping charges. All returns must comply with our returns policy.
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Return this item for free
We offer easy, convenient returns with at least one free return option: no shipping charges. All returns must comply with our returns policy.
Learn more about free returns.- Go to your orders and start the return
- Select your preferred free shipping option
- Drop off and leave!
Purchase options and add-ons
Color | Black |
Brand | ThreeH |
Material | Aluminum |
Item Weight | 300 Grams |
Product Dimensions | 21.26"L x 3.94"W x 7.09"H |
About this item
- 🚲Application: It fits most seat post diameters less than 32 mm, but not for folding bikes and bicycles with shock absorption.
- 🚲Load capacity: 110Lb Capacity, Durable Alloy Steel Rack. It is made of high quality Aluminum Alloy,durable and solid.It is suitable for most bicycles, such as road bike, mountain bike, fat bike, etc.
- 🚲Dimension: Shelf Length 55 cm, Width 14.2 cm(21.6x5.6in);Panel Length 35.5 cm,Width 14.5 cm(13.9x5.9in). It is adjustable for many kinds of bikes. Easy to Mount.
- 🚲Convenient: With side protecting frame, your luggages are protected from scratching by the wheel or spokes
- 🚲Secure: Includes Red Rear Reflector Lamp and Elastic Cords, which can make you safer to riding at night and keep your luggage secure.
Frequently bought together

Frequently purchased items with fast delivery
Product Description

Note: It does not compatible with folding bikes and bicycles with shock absorption.
1.Seatpost and Frame-Mounted for Heavier Top & Side Load.
2.Quick Release Design for Easy Disassembly.
3.Side Bar / Flank Included. (Can be removed when not necessary.)
4.Suitable for Long Trail Trip, Bike Camping and Mountain Biking.
5.It is a durable, versatile bike cargo rack for long distance touring.
Specification
- Material: High Quality Aluminum-Alloy
- Length: 21.6" / 55cm
- Width: 5.6" / 14.2cm
- Platform Board: 13.9x5.9"/35.5x14.5cm
Capacity
- Suitable for seatposts with a diameter of 32mm/1.26 or less.
- Load Capacity: 110lbs / 50kg
- Product Weight: 2.54lbs/1.15kg
Installation
- Each bracket is equipped with a gasket to protect the frame. Please placed it in the correct position during installation.
The lateral supports are retractable to facilitate the adjustment of the fixed seat.
Rearview mirrors make you safer when driving at night.
Three screws under the main panel can help to effectively adjust the length of the seat.
High-strength elastic rope can effectively fix goods without slipping.
Carrying goods display
Overview
Details
![]()
Bike rear rack BK41
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Bike rear rack BK431
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Bike rear rack BK46
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Bike rear rack BK47
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Bike rear rack BK48
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Customer Reviews |
4.0 out of 5 stars 1,717
|
4.3 out of 5 stars 857
|
4.0 out of 5 stars 21
|
3.9 out of 5 stars 102
|
3.9 out of 5 stars 4
|
Price | $19.98$19.98 | $32.88$32.88 | — no data | $24.82$24.82 | — no data |
Material | Aluminum alloy | Aluminum alloy | Aluminum alloy | Aluminum alloy | Aluminum alloy |
Load-bearing range | 0-22lb | 0-110lb | 0-110lb | 0-20lb | 0-165lb |
With reflective light | no data | ✓ | ✓ | ✓ | ✓ |
Product information
Technical Details
Additional Information
ASIN | B0789LSVC2 |
---|---|
Customer Reviews |
4.3 out of 5 stars |
Best Sellers Rank | #157,397 in Sports & Outdoors (See Top 100 in Sports & Outdoors) #114 in Bike Cargo Racks |
Date First Available | December 15, 2017 |
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ThreeH Bicycle Rear Rack Adjustable Aluminum Alloy Bike Rack with Reflector BK431
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Videos
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ThreeH Bicycle Rear Rack Aluminum Alloy BK43ThreeH Direct
Customer reviews
Customer Reviews, including Product Star Ratings help customers to learn more about the product and decide whether it is the right product for them.
To calculate the overall star rating and percentage breakdown by star, we don’t use a simple average. Instead, our system considers things like how recent a review is and if the reviewer bought the item on Amazon. It also analyzed reviews to verify trustworthiness.
Learn more how customers reviews work on AmazonCustomers say
Customers find the bicycle rack easy to install and appreciate its functionality, with one mentioning it works well with 26-inch fat tires. Moreover, the design receives positive feedback, and customers consider it good value for money and lightweight. However, the build quality and fit receive mixed reviews, with some finding it well-made while others report it breaking within two months and not fitting their bikes properly.
AI-generated from the text of customer reviews
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Customers find that the bicycle rack works well, with one mentioning it fits well on a 26" fat tire.
"This is a great bike rack. Inexpensive, good quality, handy, and easy to install. Wouldn’t hesitate to get another one." Read more
"...No issues, nothing came loose, and I'm confident in the product and my installation." Read more
"...and easy to install, it looks real nice in my mountain bike and adds functionality that is hard to beat for the price if this item...." Read more
"It’s a great rack for the price however no instructions came with the rack. Also, my pack was missing the part to secure the reflector...." Read more
Customers like the design of the bike rack.
"This is a great bike rack. Inexpensive, good quality, handy, and easy to install. Wouldn’t hesitate to get another one." Read more
"...reviews and was confident that this rack would fit my tires, and it looks great...." Read more
"Absolutely well made and easy to install, it looks real nice in my mountain bike and adds functionality that is hard to beat for the price if this..." Read more
"Very nice bike rack. Price was reasonable. It would have been nice if the telescoping adjustment tubes were a bit longer...." Read more
Customers find the bicycle rack to be good value for money.
"This is a great bike rack. Inexpensive, good quality, handy, and easy to install. Wouldn’t hesitate to get another one." Read more
"It’s a great rack for the price however no instructions came with the rack. Also, my pack was missing the part to secure the reflector...." Read more
"good for the price, sturdy" Read more
"Very nice bike rack. Price was reasonable. It would have been nice if the telescoping adjustment tubes were a bit longer...." Read more
Customers appreciate that the bicycle rack is lightweight.
"...The rack is super light weight, appears to be made of thick rolled aluminum. Shipping did take a few weeks, but if you can wait, it's worth it." Read more
"Lightweight that can hold a lot of weight very highly recommend..." Read more
"It's helpful, light and fashion..." Read more
Customers have mixed opinions about the build quality of the bicycle rack, with some finding it well made with quality aluminum construction, while others report it breaking within two months and being not strong enough.
"This is a great bike rack. Inexpensive, good quality, handy, and easy to install. Wouldn’t hesitate to get another one." Read more
"...Take your time and work from side to side and you can get a solid reliable install...." Read more
"...ThreeH rear bike rack shall be deemed 2024's 1st bad item... I mean REALLY bad... This is fresh out of the box, and has NOT been installed on my bike..." Read more
"Absolutely well made and easy to install, it looks real nice in my mountain bike and adds functionality that is hard to beat for the price if this..." Read more
Customers have mixed experiences with the bicycle rack's installation, with some finding it very easy while others report missing instructions.
"This is a great bike rack. Inexpensive, good quality, handy, and easy to install. Wouldn’t hesitate to get another one." Read more
"...things on the trail if they came loose, but otherwise was able to install without issue...." Read more
"...Also there is no easy way to attach any standard light designed for stem mount onto the rack - this is just stupid...." Read more
"Absolutely well made and easy to install, it looks real nice in my mountain bike and adds functionality that is hard to beat for the price if this..." Read more
Customers have mixed experiences with how the rack attaches to their bikes, with some finding it fits perfectly while others report compatibility issues.
"It fits quite good on our new Freesky e-bike. It's easy to install and adjusts easily to attach to frame of bike...." Read more
"Easy to tighten onto the seat post and frame, with potential for expansion...." Read more
"The rack was easy to install and fits perfectly on my EBIKE. It is a bit narrow to be able to place a very large item on it and transport it,..." Read more
"Adjustable. Sturdy. Recommended." Read more
Reviews with images

Fits Ecotric Fat Tire Bikes - Easy installation
Top reviews from the United States
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- Reviewed in the United States on January 20, 2025This is a great bike rack. Inexpensive, good quality, handy, and easy to install. Wouldn’t hesitate to get another one.
- Reviewed in the United States on October 26, 2021I needed a rear rack for my fat tire bike that has 4" tires. I read a lot of reviews and was confident that this rack would fit my tires, and it looks great. In the reviews I noticed that several people complained about the rack breaking or failing with light loads, so I proceeded with caution. First, LOOSELY assemble everything. Do NOT tighten anything too much. Next, mount the clamp on your seat post and tighten it to where you plan to leave it using the rubber inserts. This gets the carrier mounted above your tire and centered so that you can adjust/tighten everything else. Now, take your time and get everything else mounted/adjusted without fully tightening anything. I did add a few lock washers in areas where I didn't want to have to tighten things on the trail if they came loose, but otherwise was able to install without issue. I can see that if you would over-tighten one area and then tighten the other side that you would accidentally stress a joint or a tube and not know it until your load snapped something. Take your time and work from side to side and you can get a solid reliable install. For my first ride, I went 3 miles to the grocery store with a cooler on the rack. I put a gallon of milk, a bag of apples, a family pack of chicken, and a few miscellaneous things into the cooler, so this was a fairly heavy/unbalanced load. No issues, nothing came loose, and I'm confident in the product and my installation.
- Reviewed in the United States on September 11, 2019Absolutely well made and easy to install, it looks real nice in my mountain bike and adds functionality that is hard to beat for the price if this item. It came easily packaged and its basically a two screw set up. It took me approximately fifteen minutes to install and it looks great. I recommend this rack.
- Reviewed in the United States on October 22, 2022This is a solid rack, you don't have to be a bike mechanic expert to installed this, just look at the pictures on Amazon, it's pretty self explanatory, if you can change a bike tire inter-tube, this is just as simple, just take your time, comes with all the hardware and tools needed. I did use my own Allen wrench set for better leverage for extra tightness. This fit my Ecotric Fat Tire Bike frame with no problem. The only down side to this type of rack I can see is if your use to riding with the seat post all the way as far as it can go, you lose some of that maybe 1/2 inch for the rack to grab on to the seat post for support. The rack is super light weight, appears to be made of thick rolled aluminum. Shipping did take a few weeks, but if you can wait, it's worth it.
5.0 out of 5 starsThis is a solid rack, you don't have to be a bike mechanic expert to installed this, just look at the pictures on Amazon, it's pretty self explanatory, if you can change a bike tire inter-tube, this is just as simple, just take your time, comes with all the hardware and tools needed. I did use my own Allen wrench set for better leverage for extra tightness. This fit my Ecotric Fat Tire Bike frame with no problem. The only down side to this type of rack I can see is if your use to riding with the seat post all the way as far as it can go, you lose some of that maybe 1/2 inch for the rack to grab on to the seat post for support. The rack is super light weight, appears to be made of thick rolled aluminum. Shipping did take a few weeks, but if you can wait, it's worth it.Fits Ecotric Fat Tire Bikes - Easy installation
Reviewed in the United States on October 22, 2022
Images in this review
- Reviewed in the United States on March 8, 2025Good quality
- Reviewed in the United States on March 7, 2024I only get a bad item from a seller on Amazon MAYBE twice a year, tops... 90 orders in '23, and going on 30 this year... That's a pretty good success rate, if I do say...
This ThreeH rear bike rack shall be deemed 2024's 1st bad item... I mean REALLY bad... This is fresh out of the box, and has NOT been installed on my bike...
Allow me to expose you to these photos...
1) Bent bracket
2) Bent main rail, front
3) A plastic cap would've been nice... And the reflector bracket is riveted... Removal in lieu of a taillight bracket would require drilling...
4) Before TIG-welding, I'd venture to say that the main rail should've been clamped into those round receiver brackets... A 7-year-old could've welded it better than this Chinese robot... THAT'S ON BOTH SIDES...
5) Another reviewer said his platform was not mounted properly, same as this one...
6) Nobody will ever convince me that this thin clamp is good for 110lbs... The support brackets wont be of much help, as the screws only dig into the surface of the inner post...
With some good screws, strong epoxy, my Dremel, and about 4 hours of my life, I could rebuild this bike rack and make it tough as nails... But I'm not going to... It'll be back on a UPS truck tmrrw...
Excellent Advice: Leave this one and all it's copycats with Amazon's deceptive sellers... THIS IS A TRULY DEFECTIVE PRODUCT WITH SHODDY WORKMANSHIP, AND SHOULD BE REMOVED AND BANNED FROM THE AMAZON COMPUTER SYSTEM...
ZERO STARS IF I COULD...
GOOD DAY...
1.0 out of 5 starsI only get a bad item from a seller on Amazon MAYBE twice a year, tops... 90 orders in '23, and going on 30 this year... That's a pretty good success rate, if I do say...This Rack is a Wreck...
Reviewed in the United States on March 7, 2024
This ThreeH rear bike rack shall be deemed 2024's 1st bad item... I mean REALLY bad... This is fresh out of the box, and has NOT been installed on my bike...
Allow me to expose you to these photos...
1) Bent bracket
2) Bent main rail, front
3) A plastic cap would've been nice... And the reflector bracket is riveted... Removal in lieu of a taillight bracket would require drilling...
4) Before TIG-welding, I'd venture to say that the main rail should've been clamped into those round receiver brackets... A 7-year-old could've welded it better than this Chinese robot... THAT'S ON BOTH SIDES...
5) Another reviewer said his platform was not mounted properly, same as this one...
6) Nobody will ever convince me that this thin clamp is good for 110lbs... The support brackets wont be of much help, as the screws only dig into the surface of the inner post...
With some good screws, strong epoxy, my Dremel, and about 4 hours of my life, I could rebuild this bike rack and make it tough as nails... But I'm not going to... It'll be back on a UPS truck tmrrw...
Excellent Advice: Leave this one and all it's copycats with Amazon's deceptive sellers... THIS IS A TRULY DEFECTIVE PRODUCT WITH SHODDY WORKMANSHIP, AND SHOULD BE REMOVED AND BANNED FROM THE AMAZON COMPUTER SYSTEM...
ZERO STARS IF I COULD...
GOOD DAY...
Images in this review
- Reviewed in the United States on July 22, 2022It fits quite good on our new Freesky e-bike. It's easy to install and adjusts easily to attach to frame of bike. Don't know yet how it will hold up with weight on it, but it seems well built with solid connectors, so I think it will work just fine. Looks very made; solid welding and judging by the weight of it, constructed from quality metal.
- Reviewed in the United States on April 27, 2024The rack was easy to install and fits perfectly on my EBIKE. It is a bit narrow to be able to place a very large item on it and transport it, however, the rack was not designed to replace a large basket that you occasionally see on the front of some bicycles to carry home some groceries! It is more appropriately sized to carry some rain gear or other apparel.
Top reviews from other countries
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IrynaReviewed in the Netherlands on October 15, 2024
1.0 out of 5 stars Artikel is bekrast, niet nieuw
Ik heb een nieuwe gekocht, ze hebben hem tweedehands meegenomen
IrynaArtikel is bekrast, niet nieuw
Reviewed in the Netherlands on October 15, 2024
Images in this review
-
عطيه النجيريReviewed in Egypt on April 14, 2025
5.0 out of 5 stars حمالة خلفية قوية ومتينة
حمالة خلفية قوية ومتينة مقارنة بالأوزان المسموح بيها/بالنسبة للعيوب الرباط المطاطي اللي بيجي معاه قصير ورفيع هتضطر إنك تجيب أربطة مطاطية ومتعتمدش على رباطها/ضروري ضروري الألتزام بالوزن المسموح بيه.
14/4/2025
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ReyReviewed in Mexico on March 24, 2025
5.0 out of 5 stars No necesita de los soportes
Buen material, un ajuste adecuado. Sinceramente no necesita la instalación de los soportes laterales. En la foto con una mochila de 38cm de largo
ReyNo necesita de los soportes
Reviewed in Mexico on March 24, 2025
Images in this review
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Florence SReviewed in France on December 12, 2024
5.0 out of 5 stars Très bien
Porte bagages solide. J ai pu mettre environ 12 kg dessus et j'ai roulé pendant plus de 15 jours avec tous les jours, il n a pas bougé.
- Craig BradleyReviewed in the United Kingdom on August 2, 2024
5.0 out of 5 stars Bolts may loosen if not tightened well so make sure you do.
Honestly can’t complain love having it on my bike that I use to travel daily
Product summary presents key product information
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Product Summary: ThreeH Bicycle Rear Rack Adjustable Aluminum Alloy Bike Rack with Reflector BK431
From ThreeH
About this Item
- 🚲Application: It fits most seat post diameters less than 32 mm, but not for folding bikes and bicycles with shock absorption.
- 🚲Load capacity: 110Lb Capacity, Durable Alloy Steel Rack. It is made of high quality Aluminum Alloy,durable and solid.It is suitable for most bicycles, such as road bike, mountain bike, fat bike, etc.
- 🚲Dimension: Shelf Length 55 cm, Width 14.2 cm(21.6x5.6in);Panel Length 35.5 cm,Width 14.5 cm(13.9x5.9in). It is adjustable for many kinds of bikes. Easy to Mount.
- 🚲Convenient: With side protecting frame, your luggages are protected from scratching by the wheel or spokes
- 🚲Secure: Includes Red Rear Reflector Lamp and Elastic Cords, which can make you safer to riding at night and keep your luggage secure.
Product Description
Features:
1.This Bike Rear Rack is Adjustable and Build-in Rear Reflector.
2.Main Platform Can be Adjustable.
3.Seatpost and Frame-Mounted for Heavier Top & Side Load.
4.Suitable for Seatpost Diameter 33mm or Less
5.Quick Release Design for Easy Disassembly.
6.Side Bar / Flank Included. (Can be removed when not necessary.)
7.Suitable for Long Trail Trip, Bike Camping and Mountain Biking.
8.It is a durable, versatile bike cargo rack for long distance touring.
Specification:
Material: High Quality Aluminum-Alloy
Length: 21.6" / 55cm
Width: 5.6" / 14.2cm
Platform Board: 13.9" x 5.9" / 35.5cm x 14.5cm
Weight: approx. 2.54lb / 1.15kg
Package:
1 x Bike Rear Rack
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