Best Selling Products

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 American Unsealed Bottom Bracket 24tpi Unsealed

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

The Theory Bypass Bars are a 2-piece chromoly construction with a basic geometry that anyone can get used to. Width: 29.5" Upsweep: 2° Backsweep: 12°

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...

The Theory Conversion Headset turns a non integrated 1-1/8" headtube frame into an integrated one with this kit. This kit includes everything you n...

Theory Crank Arm Pinch Bolts Sold as a pair  

The Theory Data grips use a classic and comfortable mushroom style pattern. 150mm in length to work with today's wider bars. 

The Theory Downtown 2 Bolt Railed Seatpost is an aluminum post that uses a two bolt design. Nothing overly fancy, just a workhorse looking to hold ...

Theory Elevate 29" Forks Someone had to eventually bring another decent option to the 29" wheel game, and Theory did just that. The Elevate Fork is...

Theory Elevate 29" Forks (With Disc Mount) Someone had to eventually bring another decent option to the 29" wheel game, and Theory did just that. T...

Theory Fork Compression Bolt M24

Theory Headset Spacer Kit Aluminum Kit includes 3 spacers: (1)2mm , (1)5mm, and (1)10mm Fits 1-1/8" steer tubes

6" x 2"

Theory Integrated Headset Sealed cartridge bearings 10mm dust cover

The Theory Legacy NW Sprocket is a "narrow wide" sprocket design meaning it is meant to be used with multi speed bikes. The "narrow wide" design, o...

Theory Legacy Sprocket  6061 Aluminum 19mm and 22mm adapters included 1/8" 

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 Method Tires are a great addition to the big BMX game with its refined design that offers a fast and grippy tire that wont break the bank.

The Theory Method Tires are a great addition to the big BMX game with its refined design that offers a fast and grippy tire that wont break the bank.

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