Customer Reviews

Shimano UN26 Tapered Spindle Bicycle Bottom Bracket

5 star:		(2)
4 star:		(3)
3 star:		(2)
2 star:		(0)
1 star:		(1)

 

 

This product was purchased because it is the reccommended bottom bracket for the the Alivio crankset that I reviewed earlier. I've read in some of the customer reviews that this product fails under heavy use. That really wasn't a concern of mine as my bike isn't ever subjected to heavy use. I use it mostly for short trips within my neighborhood. This BB is very smooth and it's easy to install if you have the proper tool. It's a perfect fit for what I use it for. It's also priced right.

this BB is fine for onroad and light off road but it may be worth the extra 8 bucks for the UN54 which runs much smoother and is by far stonger.

I bought this bottom bracket as a replacement for original equipment on a Diamondback mountain bike. I noticed that despite my effort to match the dimensions, the bottom bracket wouldn't thread fully into the bike but I don't fault the product for that and in any case functionally it works just fine.

The action of the bottom bracket is very smooth. The plastic cup included with the product got a bit beat up as I tried to install it, so I ended up keeping the original metal cup from the original equipment bottom bracket. I would have preferred a metal cup.

Overall, based on the Shimano brand and reasonable price, I would purchase the item again and so far it is performing well.

Ordered this to convert a triple crankset to a double crankset.

Other than the weight, which is to be expected at this price point, this is a solid bottom bracket that will work for years without any maintenance.

Source: I am a professional bicycle technician with over 15 years of experience.

Bottom brackets shouldn't just break. Mine did.
According to the instructions on my bike, the bottom bracket was a Shimano. But when I pulled it, it was a different brand. Maybe that's why it broke?

The Shimano BB-UN26 is a pretty common cartridge on bikes. This one has a hard plastic locking ring/sleeve, which is my only complaint. Having said that, the plastic might allow for easier replacement on threads that are rusted or damaged. Just pay close attention to the instructions, because you do not want to add a petroleum product onto a plastic locking ring.
Pay attention to the direction of the threads!

If you have a torque wrench, use it. This is the 3rd time I've been able to use mine, and it felt good to know that I was torquing the bracket to the correct tightness.
Best of luck.

The Shimano bottom bracket is excellent. I needed to replace my old one because the thread holding the pedal arm on had become stripped. That happened when my son's 320-pound buddy rode my Mongoose sx 6.7 mountain bike. Somehow.

The item arrived in about three days. The directions were unambiguous. I only needed to borrow a special tool from a buddy, and the job was completed and cleaned up in less than 30 minutes.

The big boy has ridden again a number of times in the past two months; no sign of wear at all. I ride it myself on weekends. This seems to be one of those mythical "bullet-proof" mechanical Shimano items we've heard about! Great price ($26!!), easy installation, high quality. Perfect.

The picture of the Shimano BB UN26 clearly shows the plastic threaded cup at one end. However, this was missing, so I am having to return this item. I would like to ask the seller if they can replace it with the complete product as advertised, however, Amazon only seems to have the option to return it or replace it. With no way (that is evident to me) to ask the seller for clarification, I am giving up and going elsewhere.
I am not giving up on Amazon altogether, I feel that the part may have fallen out of the box before they packed it, as the internal packaging was flimsy/partly open. None of he other reviews that I read has this issue.
I have emailed 2 other websites that I have found to be reliable for bike parts (loosescrews dot com and ebikestop dot com) and both have actual humans (!) that have replied the BB UN26 does indeed come with the plastic cup as pictured. So I shall buy from one of them, or from a local bike store.

Product was what was expected, and shipment was fast.
There was only one nut included though - not sure why, I've got two pedals and two legs.
It either should be two nuts or no nuts at all.
The description doesn't say that no nuts provided though, does it?
So I had to go to LBS and buy the nuts, could as well buy the BB there as well and not bother with Amazon and Niagara Works.