Theory

Please note price is for cups only, if you need the full bottom bracket kit it can be found here.

The Theory American Bottom Bracket Kit includes two color matched american bottom bracket cups, matching colored cone spacers, two precision sealed...

 Theory Bond Top Load Stem is made of cold forged 6061 aluminum with a 50mm reach. 

The Theory Conserve Cranks are traditional 3 piece style made from a durable chromoly. The Conserve cranks use a 19mm 8 spline 135mm spindle. Great...

The Theory Conserve Cranks (Bike Life Version), are made from the same durable chromoly construction as the normal version, but instead come with a...

Theory Fork Compression Bolt M24

Theory Integrated Headset Sealed cartridge bearings 10mm dust cover

Theory Legacy Sprocket 

The Theory Median Pedals are a combination of thermoplastic bodies with removable steel pins. The removable pins are perfect for utilizing one side...

The Theory Mid Bottom Bracket comes with everything you need to get your crankset installed.  The kit includes two sealed cartridge bearings, tube ...

The Theory Quickie QR  Seat Clamp lets you add some style and convenience with one swipe of the card. Alloy an anodized colors... what else do you ...

The Theory Rattlesnake Freewheel is not your basic freewheel, it comes in fancy colors! Not only does the Rattlesnake look sick, but it also sounds...

Theory Trusty Seat Clamp 6061 aluminum single bolt Colors Holds your seat straight

The Theory Verify Sprocket had one mission in mind, a solid product at an affordable price. The nexus between cheap and good usually doesn't work, ...