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Anyone trying to refit a Hyper SpinFit 700C should look elsewhere. Although the manufacturer states that the threading is the same, it is not. I spent hours attempting to get it to line up on my Hyper Spinfit 700C, and each time I though I had it threaded, it wasn't. I ended up with thousands of shreds of aluminum (that's what the closed system is made of) in my hub that I had to clean out, and in attempting to remove it once it was miss-threaded - had to smack it so hard that the plastic ends cracked. I'm no bike mechanic, but I do have a lot of patience and mechanical aptitude. This unit failed in every way. It's made of very light aluminum and plastic. The sizing washers are all plastic. The bearings are pre-sealed, and if you accidentally move wrong, everything falls apart, leaving you with sealant all over your hands and - seriously, folks... don't bother. Waste of time, at least for the Hyper SpinFit. Can't even return it because it's mauled up. Waste of money and time. Fooey.
This bottom bracket is a wonderful replacement for my 2001 Schwinn Passage! It is quiet, efficient and helped solve my free play wiggle on my chain. I was a little worried because I had a bb51 bottom bracket and was wondeting if this bb52 would fit? It did and I really don't notice any diffetence between the brackets. I got this bb52 bracket because I needed spacers and it came with 4 plastic spacer washers I needed to properly fit my bike. It has mountain stamped on the bracket I'm assuming because it's primarily used on mountain bikes but it works perfectly on my road bike. I'm so thankful I'm able to keep this Schwinn operational because it belonged to a previous cyclist that was tragically killed while riding a different bike so it has great sentimental value to me and I promise to ride this bike in honor of a wonderful person that loved the road as much as I do and remember why life is so precious when riding a bike!
Very capable replacement Shimano bb. It's hollow part plastic/aluminum, already designed to be lightweight. There's no need to buy more expensive Deore and XT models. I've ridden hundreds of miles using this Alivio bb with Deore/LX cranks. It comes from the factory well lubed(green) too. It works just fine! Grade A
good old fashioned bottom bracket. i attempted to save a few bucks by getting this bb instead of the raceface x-type bb i should have bought, but it works fine. if you dont really know what you're doing, get the proper part for your application.
be very very careful to not mess up the brittle plastic bearing dust cover
This bracket was a good replacement for my bottom bracket that had worn out after years of hard riding. Thought about replacing just the bearing but for the price i just replaced the whole thing. Installation was easy, but you do need a special tool for it. I borrowed the tool from a MTB buddy. I would buy it again if needed.