Best Bike Bottom Brackets for BMX Bikes of 2026
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Bike bottom brackets for BMX bikes are an essential component for any serious rider. They provide a smooth and durable connection between the frame and the cranks, allowing for efficient power transfer and a smoother ride. Bottom brackets come in a variety of sizes and styles, including sealed bearings and traditional cup-and-cone designs. Some high-end models even feature ceramic bearings for improved performance and longevity. Whether you're a casual rider or a seasoned pro, investing in a quality bottom bracket is a smart choice for any BMX enthusiast.
At a Glance: Our Top Picks
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Top 10 Bike Bottom Brackets for BMX Bikes
Shimano SM-BBR60 Ultegra / FC-CX70 / 105 Bottom Bracket
The Shimano SM-BBR60 Bottom Bracket is 14 g lighter and 50% less friction than the SM-BB6700. With small ball bearings to reduce weight, the anodized bearing cups provide a smoother ride. This bottom bracket is recommended for Ultegra FC-R8000, FC-6800, 105 FC-5800, Metrea FC-U5000, FC-CX70, and is an excellent choice for bike enthusiasts.
SHIMANO Square Type Bicycle Bottom Bracket
This bottom bracket is designed to fit JIS square-taper cranksets. It is a durable and reliable option for bike enthusiasts looking to replace their current bottom bracket.
SHIMANO BB-UN300 Bottom Bracket
The SHIMANO BB-UN300 Bottom Bracket is designed for JIS square-taper cranksets and offers a spindle length of 113mm. It has a BB shell width of 68mm and a bottom bracket shell I.D. of 1.37, making it a great choice for many bike models. Please note that the crankarm fixing bolts are sold separately.
SHIMANO BB-RS501 Bottom Bracket
The SHIMANO BB-RS501 is designed specifically for English thread bottom bracket frames, ensuring a seamless fit with Hollowtech II 24mm crank spindles. This product features anodized aluminum cups, which provide both strength and lightweight performance, making it an excellent choice for cyclists who prioritize efficiency. Weighing in at just 93 grams, it helps keep your bike light and agile. By integrating perfectly with your crankset, the BB-RS501 enhances your bike's overall performance and durability, allowing you to enjoy a smoother and more reliable ride.
SHIMANO BB-MT501 English Bottom Bracket
The SHIMANO Bottom Bracket is a threaded bottom bracket designed for MTB use. It features an English (BSA) thread and is compatible with a Hollowtech II spindle. The bottom bracket is made with aluminum threaded cups and comes in black color. The English thread makes the installation process easier for you, while the compatibility with Hollowtech II spindle ensures a smooth ride. The aluminum threaded cups make the bottom bracket lightweight and durable, and the black color adds a sleek look to your bike.
SRAM GXP Bottom Bracket
The SRAM GXP Bottom Bracket is designed for mountain and road bikes with English threading. It fits 68 or 73-millimeter bracket shells and comes with spacers for 73mm. The Gutter Seal Technology drastically improves sealing against the elements while reducing seal drag and friction. Additionally, the GXP Technology cuts friction, durability and weight, improving both feel and performance. The bottom brackets are interchangeable between SRAM and Truvativ cranksets but can only be installed with SRAM cranks.
ECSiNG 12pcs Bike Bottom Bracket Gasket Bicycle Crank Crankset Bottom Spacer Crankset Shim Washers Parts Road Accessories
BUCKLOS Bike Square Taper Bottom Bracket
Shimano Bb-Un300 Standard Bottom Bracket 73mm x 118mm
SHIMANO BB-UN300 Bottom Bracket
The SHIMANO BB-UN300 is designed to fit JIS square-taper cranksets, making it a reliable choice for your bike. You can easily install it with crankarm fixing bolts, which are sold separately. Its hollow spindle design not only reduces weight but also enhances performance, allowing for smoother pedaling. With a spindle length of 110mm and a BB shell width of 68mm, it provides the perfect fit for various bike frames, ensuring stability and efficiency during rides.
Frequently Asked Questions (FAQs)
1. What bottom bracket do I need BMX?
Most BMX cranks are 19mm, 22mm or 24mm so if your frame has a MID Bottom Bracket and you Cranks have a 19mm axle, you need a MID 19mm Bottom Bracket. Another example would be if your frame has a Spanish Bottom Bracket and your cranks have a 22mm axle, you need a Spanish 22mm Bottom Bracket.
2. Are BMX bottom brackets universal?
BMX frames are made in a variety of sizes and shapes and the tubing where the bottom bracket fits is no different.
3. Will a BMX bottom bracket fit a MTB?
Most MTB frames with press-fit bottom brackets are also incompatible with BMX bottom brackets due to the non-matching inner shell diameters. An MTB bottom bracket shell with a 34mm inner diameter.
During our bike bottom bracket for bmx bikes research, we found 24 bike bottom bracket for bmx bikes products and shortlisted 10 quality products. We collected and analyzed 24,000 customer reviews through our big data system to write the bike bottom brackets for bmx bikes list. We found that most customers choose bike bottom brackets for bmx bikes with an average price of $18.46.
The bike bottom brackets for bmx bikes are available for purchase. We have researched hundreds of brands and picked the top brands of bike bottom brackets for bmx bikes, including SHIMANO, SRAM, ECSiNG, BUCKLOS. The seller of top 1 product has received honest feedback from 654 consumers with an average rating of 4.9.
Jason Kiser is an editor who lives in California, he previously worked in a travel agency for ten years, which enabled him to travel a number of interesting countries and experience several different cultures along the way. His range of job and travel experiences grant him expertise in hiking, camping, outdoors and fitness.