BMX Bike Parts

The Theory Brake Lever Barrel Adjusters come in all the sizes and all the colors.  Aluminum Sold as a pair

The Theory brake rotor is a high quality steel rotor that is 160mm in diameter and 1.8mm thick.   

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°

Theory Cable Hanger Steel

The Theory Claw lever is a larger lever perfect for bikelife or other bigger bikes. Features a clamp with a flipable bolt so the lever can be run c...

Theory Cog (2.3mm Shimano Spec)  

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 Dime U-Brake is a simple cast aluminum 990 brake. Includes straddle cable and hanger. Take note Theory includes clear brake pads, clear ...

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

The Theory Grip Stop are a simple machined aluminum clamp that keeps your grip in place. What you see is what you get.  SOLD INDIVIDUALLY 

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

Theory Integrated Headset Sealed cartridge bearings 10mm dust cover

The Theory Lockdown V-Brake is your basic V-Brake. Simple yet effective. Aluminum construction 103mm long

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 Nickel Brake Lever is a traditional aluminum alloy lever paired with a hinged clamp for easy installation.