Bespoke Colorado framebuilders Mosaic have just unveiled a new urban commuter bike that will stand out in a crowd. The new CT-1 blends aesthetics with utility, then comfort with agility. Built around thru-axles, disc brakes, and a 1×11 drivetrain, the new Mosaic aims to be a fast, fun, maintenance-free commuting bike that will stand the test of time…

Mosaic Cycles CT-1 titanium commuter bike

Mosaic ct-1 commuter metrea bike titanium

If you think that Shimano Metrea groupset looks right at home on the CT-1, it’s no coincidence. When the group was ready to be unveiled, Shimano worked directly with Mosaic to build a bike for the North American Handmade Bicycle show, specifically to showcase their new groupset. Thus the CT-1 was born. Building the frame from titanium was a no-brainer for a bike meant to be ridden year round in all manner of weather, ensuring corrosion will never be an issue. For more stability, Mosaic have dropped the bottom bracket more than on most road frames (80mm on the CT-1 compared to 70-72mm on their RT series) while leaving the head tube angle steep-ish and wheelbase measurement short to keep the bike’s handling snappy.

Tech details

Mosaic ct-1 commuter metrea bike titanium bottom bracket bsa threaded

Riders will be happy to see a tried and true threaded bottom bracket on the CT-1, as well as external cable routing. Following the trend of road discs, the CT-1 uses flat mount calipers, plus 12x100mm front & 12x142mm rear thru-axles. Up front a 44mm headtube houses an ENVE GRD fork (with integrated fender) spinning on a Chris King i8 headset. While shown here with 32mm tires, Mosaic claim that the frame will clear most 38mm tires, or 35mm with fenders. In addition to fender mounts, two water bottle mounts and rear rack braze-ons should provide plenty of cargo capacity for even the longest commutes.

Mosaic ct-1 commuter metrea bike titanium fender clearance

The CT-1 is available in 5 stock sizes or optionally with custom geometry. The frame is built of 3A/2.5V straight gauge titanium tubing, though it would have been nice to see some butted tubing at the CT-1’s $4450 starting price for frame/fork/headset.

Mosaic ct-1 commuter metrea bike titanium

The standard finish will be raw titanium with media-blast logos, with paint jobs like this yellow one being an option. Still, for the cyclist who has everything except a stylish ride to work, the CT-1 might just be the ticket.



    • Jeb on

      I especially get a kick out of the fact Speedvagen is a Portland company, a place were conspicuous consumption will get your stupid expensive car keyed ……but a stupid expensive bike is applauded. Comedy.

  1. Heffe on

    Mosaic may or may not make great frames, but they are definitely greatly overpriced compared to makers such as Jim Kish or Kent Eriksen.

  2. tyler on

    ” it would have been nice to see some butted tubing at the CT-1’s $4450 starting price for frame/fork/headset.”

    this. thank you. its like porsche charging you for keyless entry. its 2017 and theres a sea of competitors out there.

    • myke2241 on

      I totally agree with the last two comments and would like to ad the not so obvious. Creating a product like this can sometimes damage you’re costumer base. It is a risk as it takes away focus from the bread & butter

  3. mudrock on

    It would have made more sense if they had built it with an internal gear hub. And why 80mm BB drop? Because commuters don’t pedal through corners? If there’s any ride I could imagine that takes a ton of corners, it would be an urban commute.

    • from the patch. on

      Maybe for easy mount/dismount, and the lower center of gravity might be more confidence inspiring if you’re carrying a lot of stuff on turns in crappy weather.

    • Papi on

      Yep, I’d agree with that, though they were probably taking into account the larger tires (increased wheel diameter/radius) when dropping the bottom bracket the extra 8mm.

  4. blah blah blah on

    too cheap too much demand to expensive not enough demand, their prices are set to keep them going and the customer happy with the lead times, but having said that if their lead time is 2 years then there not expensive enough, no frame is worth waiting 2 years for

  5. Sean on

    I find it highly interesting that my original comment about poor paint quality, failed delivery dates and bikes that aren’t ride able didn’t seem to stick last time. Maybe the author/ editor is on the band wagon and drinking the kool-aid.

      • Sean on

        Direct knowledge. Maybe not the wisest choice to buy out a paint/ powder business, try to relocate and replicate years of knowledge and know how. Pretty poor quality was rolling out initially, colors bleeding, mismatched parts and even crucial frame bits overlooked. Seems to be much better now, maybe just the learning curve at some customers expense.


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