We consider a conversion bottom bracket to be a worthy investment in the long run. Let’s take you step by step, type by type, and find the best conversion bottom bracket for you.

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Our Top Picks:

Best Overall: Buy: Truvativ Conversion Bottom Bracket READ REVIEW

Best For Mtb: Buy: Hoypeyfiy Conversion Bottom Bracket READ REVIEW

Best For Perfect Fit: Buy: Sunlite Conversion Bottom Bracket READ REVIEW

Best For Easy Install: Buy: Shimano Conversion Bottom Bracket READ REVIEW

Best With Ball Bearing: Buy: Donsp1986 Conversion Bottom Bracket READ REVIEW

Best For Good Quality: Buy: Fenix Cycles Conversion Bottom Bracket READ REVIEW

Best For Clearing The Predator Engine: Buy: Cdhpower Conversion Bottom Bracket READ REVIEW

Best For Bmx: Buy: Alta Conversion Bottom Bracket READ REVIEW

Best For A Bike: Buy: Wheels Manufacturing Conversion Bottom Bracket READ REVIEW

Best For Wide Range Of Applications: Buy: Vbest Life Conversion Bottom Bracket READ REVIEW

Compatible With Gossamer: Buy: Fsa Conversion Bottom Bracket READ REVIEW

Best Overall: Truvativ Conversion Bottom Bracket

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Truvativ conversion bottom bracket is the epitome of what a great bracket should be. The Truvativ Conversion Bottom Bracket is smoother and it can be trusted for good quality. Make sure this fits by entering your model number. And, this is perfect for bottom bracket fit, It goes slow and has a great design.

Above all, the truvativ conversion bottom bracket allows for a great deal and has an adjustable design.

Most customers agree that the bracket allows you to change an older one - piece crank into a newer style setup that allows the use of a bottom bracket and a two - piece crank. Also, a few also found that the bracket fits into any one piece crank bb opening quite well. And, they say that the bracket fits huffy crankbrook plus fit with no gap and no filing.

• These make spacers to solve problems like this.
• This will fit an internal cartridge w/ English threading.
• This is used to determine how much needs to be ground off.
• Cnc machined with 3 connecting bolts to prevent independent rotation.

Best For Mtb: Hoypeyfiy Conversion Bottom Bracket

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The Hoypeyfiy Conversion Bottom Bracket's material feels more premium than its price would suggest. The hoypeyfiy conversion bottom bracket is very durable and it provides great value. Please check the size of your original square taper bottom bracket. In addition, it fits perfectly and it is great for bike crank.

Lastly, the hoypeyfiy conversion bottom bracket fits great and it is good for mountain bike.

Most customers agree that the bracket comes with crank bolts. Also, they strongly agree that the bracket is designed to fit a square tapered spline, possibly. In addition, they strongly agree that the bracket is made of steel, so it'll weigh a little more than aluminum shell bottom brackets. To sum up, most customers call the bracket suits best, and no one questions it.

• This is great for the price, holding up after 120 miles.
• This is perfect for high class quality and it works perfectly.
• Interface: square taper, shell size: 68 millimeter,s bearings: steel.
• This will indeed thread into the frame.

Best For Perfect Fit: Sunlite Conversion Bottom Bracket

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If you often find yourself scrambling for a convenient and suitable bracket, Sunlite Conversion Bottom Bracket should be your first option for buying. The sunlite conversion bottom bracket comes with great quality and it is best for mountain bike. Make sure this fits by entering your model number. Further, it works well for good quality, buy again and it is great for high quality.

Above all, the sunlite conversion bottom bracket is applicable and it is smoother.

Most buyers opine that the bracket will last for many many years to come. Moreover, they strongly agree that the bracket is easy to install, bearings are very smooth. And, they strongly agree that the bracket can vary a whole lot based on your cranks. Obviously, this bracket passed the test and had very satisfied buyers eager to share their experience.

• This provides a table with most of the common crank sets listed.
• This is great for a great price and it provides great value.
• This is a great bottom bracket to convert from steel one piece cranks.
• This is better and faster and the sealed cartridge is way easier to install or uninstall.

Best For Easy Install: Shimano Conversion Bottom Bracket

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The Shimano Conversion Bottom Bracket is capable of outshining several other brackets featured in this list in overall features for the price point. The shimano conversion bottom bracket is built for mountain bikes, is built for mountain bikes and it is solid. Make sure this fits by entering your model number. Further, it is made with great quality and it makes for excellent quality. Most importantly, the shimano conversion bottom bracket is made for easy install and it works great.

Most customers found that the bracket is used for about 100 miles so far with no problems. Moreover, a few also found that the bracket looked like a square taper spindle. In addition, they strongly agree that the shimano bottom bracket actually stripped part of the 1st thread in the shell, but luckily it threaded in the rest of the way no problem. In conclusion, the tone of buyers is very positive and we believe that the bracket suits the purpose.

• This is a great replacement bottom bracket for any cheap bike.
• This is easy to install, well made for the price.
• Delivers what they promise.

Best With Ball Bearing: Donsp1986 Conversion Bottom Bracket

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Not everyone likes to purchase brackets for their daily usage, but the Donsp1986 Conversion Bottom Bracket would be an anomoly. The donsp1986 conversionbottom bracket feels good, is best for good fit and it fits well. Make sure this fits by entering your model number. Furthermore, , I bought it again and it is perfect for mountain bike. Finally, the donsp1986 conversion bottombracket is designed for easy install, works well and it is smoother.

Most customers agree that the bracket is 68 x 120mm, Please check your bike size. In addition, a few say that the bracket can be used on older (90's) fuji blvd xc. Further, they also found that the bracket comes with both the bottom bracket as well as the two crank bolts. In conclusion, the tone of buyers is very positive and we believe that the bracket suits the purpose.

• For bike type: mountain bike, road racing bike etc. Spindle interface: square taper.
• Aluminum sheath,cold-forged steel cups, boron axel/spindle, sealed bearings.
• Package includes:1*sealed bearing bottom bracket including cups+2 waterproof screws.

Best For Good Quality: Fenix Cycles Conversion Bottom Bracket

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Compared with other brackets in this category, the Fenix Cycles Conversion Bottom Bracket has a convenient design. Moreover, the bracket works for use with single - speed bicycles and it works well. For a bottom bracket conversion kit, set 1pc to 3pc crank 128mm chrome. Lastly, the fenix cycles conversion bottom bracket works well for good quality and it provides great value.

Most buyers opine that the bracket will grind the bearings into the cups. And, they say that the bracket fits old school bmx freestyle bikes. Overall, many have used the bracket for more than a few months without letup, and it shows no sign of giving up.

• Includes: 5/16 x 9 bearings, 51.1mm cups, 128mm 24tpi axle length.
• 1 piece to 3 piece crank conversion kit.
• New and hot releases.

Best For Clearing The Predator Engine: Cdhpower Conversion Bottom Bracket

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We would, of course, be remiss if we didn't mention Cdhpower Conversion Bottom Bracket for daily usage. The cdhpower conversion bottom bracket is cross and it is solid. The manufacturer says: We can help you solve the problem until you are satisfied. In addition, this comes with a month 's warranty plus it is the first Chinese company engaged in volume production of cdh gt gas bikes and cdh gas frames in China. Lastly, the cdhpower conversion bottom bracket is reliable and it is used for mountain bike.

One customer says - "The inserts are deep, so if the crank stays, seat post or forward frame sticks into the bracket housing after welding, you have to re-shape the new converter. ". Most buyers quickly discovered that the bracket is great for clearing the predator engine. Obviously, this product passed the test and had very satisfied buyers eager to share their experience.

• Black bb bottombracket conversion kit (american to euro).
• Good brand reputation.

Best For Bmx: Alta Conversion Bottom Bracket

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The Alta Conversion Bottom Bracket is lightweight and it is designed for good fit. Make sure this fits by entering your model number. Moreover, it fits well and it fits perfectly. Above all, the alta conversionbottom bracket is available in a total of 2 different colors: black and silver.

Most buyers quickly discovered that the bracket is not the right solution for a bafang mid - drive electric motor. And, they also found that the bracket is to convert old school bikes with bearing cups to a 68mm cartridge. Further, they say that the bracket looks like it should be durable. Overall, for most customers, the bracket was most suitable.

• Converts American bottom bracket to European bottom bracket.
• New and hot releases.

Best For A Bike: Wheels Manufacturing Conversion Bottom Bracket

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Wheels Manufacturing line of brackets comes in a pretty wide variety of styles, so you can definitely find one that suits your individual preferences and needs. The wheel manufacturing conversion bottom bracket is stable and has a great bb design. Make sure this fits by entering your model number. Also, the bracket is not compatible with Cannondale bb30a bottom brackets.

Lastly, the wheel manufacturing conversion bottom bracket works great, its build quality is great, it is solid and has a stable design.

Almost all customers quickly discovered that the bracket was an option as well. Moreover, a few say that the bracket is basically a conversion from bb30 to the normal outside bottom bracket. Also, they also found that this bottom bracket is designed to fit the hollowtech ii cranks.

• Anodized machined aluminum cups, dual silicone seal keep the contamination out for a longer life.
• This is better quality than the Shimano stock bb.
• This fits bb30 frames with a shell diameter of 42 mm.

Best For Wide Range Of Applications: Vbest Life Conversion Bottom Bracket

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The best life conversion bottom bracket's material feels more premium than its price would suggest. The Vbest Life Conversion Bottom Bracket is suitable for a frame with a length of 86.5mm / 3.41in. Make sure this fits by entering your model number. The bicycle bottom bracket is compatible with 24 mm cranks and is suitable for sram ( 24 mm can be converted to 22 mm using a conversion tube ), shimano, fsa, prowheel, etc.

Lastly, the vbest life conversion bottom bracket is made with high-quality materials and it is powerful.

• This works for a wide range of applications, it is applicable and has a simple design.
• This is ideal for high strength and it is made with high-quality.
• Good investment for the long term.

Compatible With Gossamer: Fsa Conversion Bottom Bracket

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Next on the list, we've got yet another bracket that manages to win our hearts. It's the Fsa Conversion Bottom Bracket and it's widely considered as the bracket that has the most suitable features. Moreover, this is compatible with gossamer and it is solid. Make sure this fits by entering your model number. Most importantly, the fsa conversion bottom bracket is lighter and it works well for press fit.

Most customers opine that the bracket is basically the shell that would have been bonded into a carbon frame at the factory to make it bsa. Moreover, they say that the bracket is that, in shedding weight by thinning out the middle of the insert, they've reduced the bonding area. In conclusion, most buyers found the bracket suits best, and no one questions it.

• Compatible with gossamer, gossamer pro, and energy megaexo, oversize cartridge bearings.
• Package dimensions: 2.8" l x 3.1" w x 1.8" h.
• Forged alloy and cnc machined external cups, composite center sleeve w/double o-ring seals.