Eastern Bikes has developed a plastic bottom bracket, which according to reports is performing well in prototype stages. The plastic bottom brackets will be significantly less expensive than a standard metal version, as well as far lighter.
On a Spanish bb you would save roughly 6.5 ounces. One small production run is currently being tested and although tests are returning positive results, it is said that modifications can still be made to improve the design.
The cup will press into the frame with a lot less effort than that required with a metal cup, yet apparently fits just as tight.
The bearings used are designed to do away with the stacks of washers many bikes require, although polymer washers will be available on launch.