Mosaic GT-1 Custom Ti
Moderators: MrCurrieinahurry, maxim809, Moderator Team
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- Posts: 1163
- Joined: Fri Dec 21, 2018 2:25 am
- Location: New York
Fully custom, titanium, Mosaic GT-1. Handmade in Boulder Colorado, internally routed with a small titanium guide tube welded inside the downtube. Max 45mm tires and has fender eyelets. And, of course, built in my home workshop. Build quality and flat mount so perfect it took 1 attempt to have perfect rotor alignment.
The goal of this bike was to do everything from chunky gravel to fast road, bad weather, and anyhting else I could think of. The emphasis was on ability to climb steep gradients (lots of 18-20%+ around here). Simplicity was important for ease of packing to fly with.
Frame: Mosaic GT-1 titanium, custom geometry
Fork: Enve gravel
Paint: Spectrum Powder Works/Mosaic
Groupset: SRAM Red AXS 1x, Red XPLR rear derailleur
Wheelset: Bora WTO 60, HED Belgium G/CK R45d hubs
Tires: 32mm GP5k S TR, 42mm Rene Herse Hurricane Ridge
Crankset: 3T Torno, 36t chainring
Bottom Bracket: THM, English threaded
Cassette: XPLR 10-44
Rotors: Campagnolo 160mm
Stem: Enve 100mm
Bars: Enve 42cm
Bottle Cages: Alpitude
Pedals: Look Carbon Blade 2 Ti ceramic, Eggbeater 11 titanium
Saddle: S-works power arc
Seatpost: Enve
Garmin Mount: Alpitude
Top Cap: Alpitude
Fully Loaded Weight (pedals, garmin mount etc): 17lbs 15oz, 8.1Kg
The goal of this bike was to do everything from chunky gravel to fast road, bad weather, and anyhting else I could think of. The emphasis was on ability to climb steep gradients (lots of 18-20%+ around here). Simplicity was important for ease of packing to fly with.
Frame: Mosaic GT-1 titanium, custom geometry
Fork: Enve gravel
Paint: Spectrum Powder Works/Mosaic
Groupset: SRAM Red AXS 1x, Red XPLR rear derailleur
Wheelset: Bora WTO 60, HED Belgium G/CK R45d hubs
Tires: 32mm GP5k S TR, 42mm Rene Herse Hurricane Ridge
Crankset: 3T Torno, 36t chainring
Bottom Bracket: THM, English threaded
Cassette: XPLR 10-44
Rotors: Campagnolo 160mm
Stem: Enve 100mm
Bars: Enve 42cm
Bottle Cages: Alpitude
Pedals: Look Carbon Blade 2 Ti ceramic, Eggbeater 11 titanium
Saddle: S-works power arc
Seatpost: Enve
Garmin Mount: Alpitude
Top Cap: Alpitude
Fully Loaded Weight (pedals, garmin mount etc): 17lbs 15oz, 8.1Kg
Last edited by rollinslow on Sat Dec 30, 2023 6:49 pm, edited 3 times in total.
S-Works Tarmac SL8 (2025) Super Record Wireless
Cervelo S1 (2010) Super Record 12
Mosaic GT-1 (2020) Red AXS (Sold)
Moots Vamoots RSL (2019)-Super Record 12
Kestrel RT700 (2008)-Dura Ace 9000
Cervelo S1 (2010) Super Record 12
Mosaic GT-1 (2020) Red AXS (Sold)
Moots Vamoots RSL (2019)-Super Record 12
Kestrel RT700 (2008)-Dura Ace 9000
- Juanmoretime
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- Posts: 358
- Joined: Sat Jun 19, 2004 11:08 am
Dang! That is beautful! Ride report please.

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Always nice to see a Mosaic!
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- Posts: 11
- Joined: Mon Jan 20, 2020 10:16 am
Beautifull bike, with a stunning paint job. The only thing I dislike is the 3T cranck, it doesn't look right on the bike.
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- Posts: 1163
- Joined: Fri Dec 21, 2018 2:25 am
- Location: New York
merlinaspen wrote: ↑Thu Jan 04, 2024 2:14 pmBeautifull bike, with a stunning paint job. The only thing I dislike is the 3T cranck, it doesn't look right on the bike.

S-Works Tarmac SL8 (2025) Super Record Wireless
Cervelo S1 (2010) Super Record 12
Mosaic GT-1 (2020) Red AXS (Sold)
Moots Vamoots RSL (2019)-Super Record 12
Kestrel RT700 (2008)-Dura Ace 9000
Cervelo S1 (2010) Super Record 12
Mosaic GT-1 (2020) Red AXS (Sold)
Moots Vamoots RSL (2019)-Super Record 12
Kestrel RT700 (2008)-Dura Ace 9000
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- Posts: 1163
- Joined: Fri Dec 21, 2018 2:25 am
- Location: New York
Thanks!!!
Well, I assume Mosaic painted and filled it for cosmetic reasons to smooth the paint. If for the 8-9k USD for the frame/stem/sestpost (lost track of cost) that I paid when they made it for me they used a fake that would be quite the scandal for them haha. I have enough faith that a top tier builder would only use genuine parts.
S-Works Tarmac SL8 (2025) Super Record Wireless
Cervelo S1 (2010) Super Record 12
Mosaic GT-1 (2020) Red AXS (Sold)
Moots Vamoots RSL (2019)-Super Record 12
Kestrel RT700 (2008)-Dura Ace 9000
Cervelo S1 (2010) Super Record 12
Mosaic GT-1 (2020) Red AXS (Sold)
Moots Vamoots RSL (2019)-Super Record 12
Kestrel RT700 (2008)-Dura Ace 9000
The stem looks so much better with the holes plugged up.rollinslow wrote:Thanks!!!
Well, I assume Mosaic painted and filled it for cosmetic reasons to smooth the paint. If for the 8-9k USD for the frame/stem/sestpost (lost track of cost) that I paid when they made it for me they used a fake that would be quite the scandal for them haha. I have enough faith that a top tier builder would only use genuine parts.
-- Factor Ostro VAM gen2 Disc
-- Specialized Aethos Disc
-- Guru Praemio R Disc
-- Factor LS Disc
-- Specialized Aethos Disc
-- Guru Praemio R Disc
-- Factor LS Disc
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- Posts: 22
- Joined: Fri Jun 25, 2021 8:43 pm
- Location: Texas, USA
Wow, what a build! Recently I've really been loving the look of a metal bike with colormatched stem. The lines of the Enve stem in particular are quite nice.
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- Posts: 1163
- Joined: Fri Dec 21, 2018 2:25 am
- Location: New York
Hahah yeah. you certainly need to do some good convincing! My wife also has a Mosaic, and a friend has an RT-2 based on my positive experience with Mosaic. Everyone is happy so I can only say positive things about Mosaic.
S-Works Tarmac SL8 (2025) Super Record Wireless
Cervelo S1 (2010) Super Record 12
Mosaic GT-1 (2020) Red AXS (Sold)
Moots Vamoots RSL (2019)-Super Record 12
Kestrel RT700 (2008)-Dura Ace 9000
Cervelo S1 (2010) Super Record 12
Mosaic GT-1 (2020) Red AXS (Sold)
Moots Vamoots RSL (2019)-Super Record 12
Kestrel RT700 (2008)-Dura Ace 9000

Visit starbike.com Online Retailer for HighEnd cycling components
Great Prices ✓ Broad Selection ✓ Worldwide Delivery ✓
www.starbike.com