Aaron’s Mosaic XSS-1 Singlespeed Cross

As you can imagine, the 2015 Cyclocross Nationals brought all kinds of custom frame eye candy to town. Hidden in the fleets of Rock Lobsters and Stoempers are these blue “Singlebarrel” Mosaic XSS-1 singlespeed cross bikes. Built from True Temper tubing with Chris King, Shimano and ENVE rims, it’s not hard to spot one in the crowd of buzzing freewheels.

I bumped into Aaron from Mosaic and managed to get a few photos of his bike before the massive SSCX race took place yesterday. These bikes are lightweight, precision race machines and you can find out more about them by visiting Mosaic Cycles.

  • GioFio

    Absolutely gorgeous bike. All of these CX Nats posts are making me want to hop on the next flight from PDX to Austin. Keep the cool stuff coming dude!

  • Rob X

    This bike has me drooling at the office. But seriously, all the sscx rigs you’ve posted on the site are gorgeous and blow my mind, but this one goes above and beyond.

  • frank31

    Welds look neat. Filed smooth or silver soldered over the tig weld?

  • Stared at that last photo for a solid 5 minutes. Great bike.

  • Andrew Warren

    Is that a Shimano chainring/can anyone tell me about options for single ring (1X) 6800 drivetrains? Looking for a 42t or 44t ring that will work in a 1X setup. Who makes one that fits that bolt circle?

    • great question, my guess would be its just a stock shimano inner ring, likely a 39t based on the rear cog, which looks like a 17/18.

      • Shawn Maxwell

        I was wondering about the crank + chainring setup as well. Could someone tell me where to locate those chainring bolt covers that sit flush with the ultegra cranks? Thanks.

  • boomforeal

    sex on a stick! but john… “hidden in the fleets” followed immediately by “not hard to spot”… might be time to consider hiring a continuity editor

  • #1. Money shot.

  • tylernol

    I met Aaron at the Austin Bikes party on Thursday, super nice guy and great bikes.