Upgrade your bike's performance with the BB-UN300 Square Taper JIS Bottom Bracket - the ultimate choice for reliable, smooth-powered pedaling. Designed for cyclists seeking durability and efficiency, this bottom bracket features precision engineering and innovative components crafted for optimal compatibility with JIS square-taper cranksets. Materials & Construction: Constructed with a robust, hollow spindle, the BB-UN300 enhances weight savings without compromising strength. Its durable aluminum alloy shell provides excellent corrosion resistance and long-lasting performance in various riding conditions, from daily commuting to intense off-road adventures. Performance & Engineering: Engineered for seamless operation, this bottom bracket ensures smooth rotation and minimal resistance, improving pedaling efficiency. The hollow spindle design reduces weight and adds to the overall responsiveness of your ride, making it a perfect upgrade for both casual cyclists and competitive riders. Components & Technology: Equipped with a reliable JIS (Japanese Industrial Standard) square-taper interface, the BB-UN300 guarantees secure attachment to your crankset. Please note that crankarm fixing bolts are sold separately, allowing you to choose the perfect hardware for your setup. The 73x118mm spindle dimensions are ideal for a range of bicycle frames, ensuring compatibility across various bike models. Style & Use Case: Featuring a sleek black finish, this bottom bracket complements any bike aesthetic, whether you're outfitting a classic road bike or rugged mountain bike. Designed for ease of installation and maintenance, it's perfect for riders looking to enhance pedal stability, efficiency, and durability. Innovative & Differentiating Features: The BB-UN300's hollow spindle technology provides a lightweight yet resilient core, setting it apart from standard bottom brackets. Its compatibility with JIS square-taper cranksets ensures a secure f
8 avaliações para Shimano BB-UN300 Bottom Bracket – English, 73 x 118mm Spindle, Square Taper JIS
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Emilio (comprador verificado) –
Not a 1 size fit all
This is not a one size fit all….Get your measurements and do not listen to the discription… Do not mess up your bracket
Kendrick C. (comprador verificado) –
Defective
Wouldn’t thread into frame. Though my frame was defective but bought another BB and that one went right in
Will (comprador verificado) –
Perfect
Shimano brand that I truster ever since
Maht45 (comprador verificado) –
Works well
It works well.I only needed to respect the torque for installation, not to damage the bearings.The Q-Factor is important too; I use a crank with low Q-Factor which saves the BB life.
Michael A Gianino (comprador verificado) –
Great replacement for 26 inch Roadmaster granite peak
Great replacement for my granite peak roadmaster. Feels so much better. Thank you!
Todd (comprador verificado) –
These stand up to the desert playa dust. Essential for Burning Man. 🏜️🔥🗿
These sealed bottom brackets have become very standard.This, most people know.What you might not know is that the seal is sufficient to protect their solid, soft-riding bearings from the all corrosive alkaline dust of the Black Rock Desert playa.These are the preferred BB of Burning man tribes (along with an aluminum frame & top caliper brakes) for keeping bikes that can withstand the Burn for a number of years.A Shimano commitment to maintain a availability in nearly all US & Euro sizes is another plus.
Wade taylor (comprador verificado) –
Bottom bracket
Works perfectly and budget friendly
Music Mike (comprador verificado) –
It is 73 x 118 as listed
I like that the information about the part was correctly listed, however the image that was found online had text showing it as a 68, not 73mm body length. The bearings now feel very smooth, and I can’t wait for the weather to lighten up that I can test it on the road. Perfect replacement, as I found the 73mm bracket is now rare to find and I am glad I could find one reasonably priced.