QUALITY

Our chainrings are of the absolute best production quality.  They start as a thick plate of high quality, heat treated aluminum.  They are CNC milled to hairbreadth precision.  All of the surfaces are then anodized black for durability and a great look.  Finally, your personal engraving is then milled into the surface.  

MECHANICAL SPECIFICATIONS

We machine two sizes of chainring.

Standard Size - 130 mm BCD, 48 tooth chainring.  Fits 3/32" and 1/8" chains. - $59

Track Size - 144 mm BCD, 49 tooth chainring.  Fits 1/8" chains. - $69

*Note: It is your responsibility to ensure that the chainring will fit on your bicycle.  Email us to verify if you are unsure.

All of our production work is done right here in the USA!

  Sessions Sprockets was founded by an MIT mechanical engineering student who enjoys bicycling!  His original prototype chainring can be seen below.  In the design are four symbols representing the four seasons of the year; so that as the chainring rotates down the road, the seasons change. 

  He found that many other fixie riders shared his excitement over custom bicycle parts, and thus he founded Sessions Sprockets!  Starting with prototype designs created by a small CNC machine in his room, he perfected the art of custom sprockets: smooth mechanical function coupled with stunning design.

  Sessions Sprockets sells personalized bicycle chainrings, in two configurations (see above.)  Our chainrings are for single-speed and fixed gear bicycles ONLY.  They are not usable on a standard, differential based bicycle.