Bottom Bracket - Cartridge - 68mm - Shimano

This is Shimano's replacement for the UN55 - the UN300, it remains the best BB value in the world, and the one that goes on 90 percent of the complete bikes we ship out. It's trouble-free, installs easily (with this tool), is sealed, and you'll likely get 15,000 miles out of it. We can't say they'll work for sure with a crank you have...but if it's a Japanese crank with a square taper and the current spindle seems about the same length as the ones here, it's a good bet. They work great with the SILVER and Sugino XD-2..

We stock seven sizes: from 107 to 127. Use the 110 on bikes that have a non-mountain bike front derailer. Use the 113 or 115 if you have a mountain bike front derailer. 

Here is a short video of Mark installing a BB.