Shimano Bottom Bracket Cups Saint M815

Shimano UN 72 Tapered bottom bracket

Advantages: Cheap
Disadvantages: Breaks easily

I have had three or four of these because they were cheap, it turned out that in the long run it was cheaper to save up and buy a decent bottom bracket. Everyone of these that I bought broke in under a month, the same two faults occured each time. 1) Mud and grit easily get past the seals and wear out the bearings causing them to cease or rattle. 2) The ends of the tapered arms round off very easily, even during light XC and commuting use I have rounded them off. Steer clear and buy a decent bottom bracket, or even better get the new external type, or if your into jumping and DH get some 3piece cranks. ...

Cheezy_Feet 26.02.2006 · Read full review
Ciao members have rated this review on average: somewhat helpful
Review of UN 72 Shimano Tapered Bottom Bracket BS 68mm

Retro Tech Delivers the Goods

Advantages: Cheap, extremely durable, abuse tolerant
Disadvantages: Poor crank choice, may not be suitble for extreme use

What's this? It is a JIS square tapered BB. And in english... BB - bottom bracket. Screwed into the frame and serves as a mounting point for your cranks. Square taper - Axle shaft of the bottom bracket is tapered. The shaft is wider at the base than it is at the tip, so it ensures a very tight fit when the crank is tightened up. It fits square holed cranks only. JIS - Japanese International Standard. This is a measure of the degree of taper. There is also the ISO standard used by European manufacturers, such as Campagnola. The vast majority of mountain bike cranks are JIS. An ISO crank may or may not fit a JIS square taper BB depending on the tolerances and amount of wear. Evolution or Devolution? In the last few years BB's have undergone something of a revolution. Octalink from Shimano, ISIS from ...

fred_redwood 31.05.2008 · Read full review
Ciao members have rated this review on average: very helpful
Review of Shimano UN54 Bottom Bracket

Very good but very very boring

Advantages: Virutally indestructable
Disadvantages: None

Before I go and review a bottom bracket, it might be worthwhile if I explained to everyone what exactly a bottom bracket is. Let's start at the pedals. The pedals are attached to the cranks, the cranks are then attached to a spindle that goes through the bike frame. This spindle and the bearings that surround it form the bottom bracket. As you may have guessed, it's not a very exciting thing to write about, so my apologies in advance for a very dull opinion. There's two times that anyone is likely to come into contact with a bottom bracket, if you're building up your bike from parts, or if there's a nasty grindy noise when you pedal and you need a new bottom bracket. In this case, many people will take their bike to a shop to get it looked at as although changing a bottom bracket is easy enough, it requires a few specialised ...

Pritch 25.11.2002 · Read full review
Ciao members have rated this review on average: very helpful
Review of UN72 Shimano XT Bottom Bracket