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When it comes to handbuilt bicycles, the sheer number of customization options—model, tubing, size, geometry and paint—can be overwhelming. But what if you could get a handmade titanium frame with proven geometry, dialed-in handling, and a simplified ordering process, all while saving time and money? That’s exactly why we created the Mosaic Batch Built program.

Designed for riders who don’t require fully custom geometry, our Batch Built frames deliver the same quality craftsmanship and refined ride quality as our Made to Order models but with a more efficient build process. This means you can get a premium American-made titanium frame, built in our Boulder, Colorado shop, in as little as a few weeks.

Why Choose a Mosaic Batch Built Frame?

1. Effortless Ordering – No need to spend time fine-tuning geometry with a fitter. Choose your frame size (48cm–62cm for road/gravel models; S–XL for mountain), and you’re set.
   
2. Handbuilt on a Budget – You get the same meticulous attention to detail as our custom frames at a lower price point—$4,750, including a Columbus carbon fiber fork for road and gravel models, Cane Creek headset, and raw finish.
   
3. Personalized Touch – While Batch Built frames start with our standard raw finish, you can choose from a full range of custom paint options to make it truly yours. Additionally, frames can be configured for any shifting system, whether mechanical, electronic, or wireless.

Meet the Mosaic Batch Built Lineup

We currently offer four Batch Built models, each designed with specific riding styles in mind.

RT-2d: Pure Road Efficiency

If the joy of smooth pavement and endless miles fuels your rides, the Mosaic RT-2d is your perfect match. With clearance for 30mm tires, this modern road bike balances efficiency, comfort, and traction. A 71-73-degree head tube angle and two unique fork rake options (size-dependent) ensure sharp and predictable handling for spirited road rides.

• Size Range: 50-62cm
  
• Straight-Gauge Size-Specific Titanium Tubing
  
• 30mm Tire Clearance w/ Road Chainline

GT-2 AR: All-Road Versatility

Built for riders who mix pavement with dirt, the GT-2 AR is the ideal companion for varied terrain. With clearance for 38mm tires, it’s quick on the road and confident on unpaved stretches. A 71-73 degree head tube angle (again, size specific) offers stable yet responsive handling, perfect for everyday adventure rides.

• Size Range: 50-60cm
  
• Straight-Gauge Size-Specific Titanium Tubing
  
• 38mm Tire Clearance w/ Road Chainline

GT-2 45: Gravel without Limits

For those who push the limits of gravel riding, the GT-2 45 is up for any challenge. With room for 45mm tires and a more relaxed head tube angle, this frame provides a confident, comfortable ride for long days on mixed-to-rough surfaces. It’s a race-proven design that’s been battle tested at Unbound, SBT GRVL and other top tier events. 

• Size Range: 48-60cm
  
• Straight-Gauge Size-Specific Titanium Tubing
  
• 45mm Tire Clearance w/ Gravel Chainline

MT-2: Batch Built Hardtail

Rounding out the lineup is the MT-2, a titanium hardtail built for fast and fun trail riding, XC racing and everything in between. With Batch Built geometry, a stock size run from S-XL, and two cabling configurations—external full-length shift/brake and internal dropper routing or eTap AXS with a dropper port—it’s a true do-it-all mountain bike.

• Size Range: S-XL
  
• Straight-Gauge Size-Specific Titanium Tubing
  
• Fits up to 29 x 2.4 tires
  
• Designed for 120mm forks
  
• Configurable Cabling Options

The Mosaic Process – How Our Batch Built Frames are Made

While Batch Built frames offer streamlined ordering and shorter wait times, they undergo the same meticulous handbuilt process as our Made to Order frames. Here’s how we ensure precision, quality, and durability:

1. Chain Stay Prep – Each model has a consistent chain stay length across all sizes, allowing us to cut and weld dropouts, chain stays, and bottom brackets in large, well, batches.
   
2. Tube Prep – Various diameters and butting profiles for seat tubes, down tubes, and top tubes are prepared with bottle cage bosses, internal brake routing, and reinforcements for electronic shifting ports.
   
3. Fixture Set-Up – Using the world’s finest frame jigs (Sputnik Tool and Anvil), we ensure each frame maintains consistent stack, reach, and angles.
   
4. Cutting & Mitering – Tubes are precisely cut and mitered to fit seamlessly together, guaranteeing a perfectly aligned frame throughout the assembly process.
   
5. Frame Build – Tubes are tack-welded in the jig before moving to our welding booth for final assembly. Alignment is checked at many stages of the process, starting here.
   
6. Welding – Our expert welders lay down flawless, stacked-dime double-pass welds that give Mosaic frames their signature strength and finish.
   
7. Quality Control – Every frame undergoes the same rigorous multi-step inspection process as our Made to Order frames to ensure perfect alignment, geometry, and finish before shipping off to a Mosaic Dealer.
   

Quick Turnaround. Maximum value. Zero Compromise. 

Unlike full custom frames that take 6-8 weeks from start to finish, Mosaic Batch Built frames are completed in as little as 2 weeks, depending on your finish selection. If you opt for a painted finish, expect a lead time of 2-3 weeks. And, because the Batch Built program streamlines our workshop efficiency, our Made to Order frames now have a faster turnaround time of just 6-8 weeks.

Which Mosaic Is Right for You?

If you’re looking for the sublimely balanced and lively ride and unbeatable durability of a high-quality, handbuilt titanium bike with tried-and-true geometry, quicker delivery, and a lower cost, a Batch Built Mosaic is an excellent choice. 

But if you’re excited about customized geometry based on a favorite bike or a pro bike fit, or the added weight savings and resilience of our premium butted titanium tubing, our Made to Order program is the path to creating your dream ride.

No matter which Mosaic you choose—Batch Built or Made to Order—you’re getting a handcrafted titanium frame, built with precision and passion, right here in Colorado.

Modern cycling is full of choices—road, mountain, gravel, all-road—each with its own appeal. On top of that, different price points and build levels add another layer of decision-making. In the Mosaic lineup, we offer our models in both a Level 1 and Level 2 option, each with its own rider-driven features and priorities.

Let’s break down what sets them apart and help you find the best fit.

Mosaic 1-Level : The Full Custom Mosaic Experience, Fit First & Maximized for Performance

At the core of the Level 1 is an internally double butted, rider-specific titanium tubeset—meticulously engineered to strike the perfect balance between strength, weight, and ride compliance. This advanced butting process removes excess material where it’s not needed while reinforcing high-stress areas, resulting in a frame that’s exceptionally strong yet lightweight. Whether you’re chasing high-speed performance, all-day comfort, or the sweet spot in between, a 1-Level Mosaic delivers a ride tuned to your specific demands.

Features such as internal Di2 routing and an optional integrated brake system enhance both aesthetics and functionality, keeping cables hidden, clean, and out of mind. Several Mosaic 1-Level bikes are available with the sleek, aero-optimized lines and a little tire clearance boost in part thanks to ENVE’s In-Route (fully integrated) fork and cockpit (RT-1 ITR, GT-1 iAR and GT-1 i45 models). The finer details and extra steps like these reinforce the Mosaic 1-Level’s reputation as one of the most capable bikes in the world, regardless of material.

Every 1-Level frame is designed from the ground up and Made-To-Order to match the rider. Using fit data from you and your Mosaic dealer, we build each bike with custom geometry and tubing specifications tailored to your specific riding style, including tube diameter, wall thickness, and butting profile. A 1-Level Mosaic bike is as unique as its rider.

Customization doesn’t stop at fit and ride tuning—the every 1-Level Mosaic offers a full spectrum of finish options. Choose from several raw titanium finishes, five core paint schemes, limited-edition Artist Series layouts, and over 150 standard & extended line colors to create a bike that’s uniquely yours. To make the wait a little easier, we provide a digital mock-up of your final design so you can admire it while we bring it to life. And yes, we know waiting is tough—but rest assured, your handcrafted masterpiece will be ready in 8 weeks or less.

Mosaic 2-Level : The Sweet Spot for Fit, Performance, and Price

All 2-Level bikes are primarily batch-built, but the experience remains uniquely tailored—and uniquely Mosaic. Drawing from fit data gathered from thousands of custom 1-Level bikes, we’ve developed a range of stock sizes designed to fit 95% of riders—while still allowing for customization in reach and drop as needed.

To achieve our goal of offering the Mosaic ride at a more attainable price, we swap ENVE forks for Columbus models on drop-bar models and use a size- and model-specific straight-gauge titanium tubeset. Every 2-Level frameset is engineered for a balanced ride that’s both responsive and compliant, with all aspects of fabrication performed in our Boulder, Colorado, workshop alongside our top-end 1-Level bikes. Compared to the 1-Level, the frame adds only about 1/2 lb. Rear brake cable routing is fully internal, and each frame is configured to order based on your drivetrain preference—eTap, mechanical, or Di2.

For those looking to personalize their ride further, the Mosaic Finishwork Program is available as an upgrade. Depending on your finish selection, a batch-built 2-Level bike can be delivered to your Mosaic dealer within 2-3 weeks.

Let’s Build Your Dream Bike

Got questions? Your local Mosaic dealer is the best place to start, but we’re happy to help as well. Reach out to us at info@mosaiccycles.com or @mosaiccycles on Instagram, and we’ll point you in the right direction.

Mosaic Team Rider Ben Frederick spent his winter racing World Cup cyclocross in Europe as part of his ProjectLeadLap campaign. But now it’s February, and while #CrossIsComing, there’s a lot of racing between now and then. Ben will be putting his Mosaic(s) to the test in a variety of U.S.-based gravel events.

Turns out, drop bars and knobby tires are about all these two disciplines have in common. We caught up with Ben to talk about how he tweaks his bike, training, race day strategy, and mindset for each discipline. 

First off, congrats on a great Euro CX campaign. You pulled off some impressive rides in tough conditions and kept up with your day job between races. How did it feel to put that behind you and come back to the States?

Ben: Thanks! It’s good to be back. Common sense would say a long break was in order, but man, I love riding bikes. The jet lag was brutal, so I was back on my MT-1 chasing sunrises pretty quick. I’m lucky to live in San Francisco, and January was the driest in recent memory—hard to stay off the bike in those conditions. It’s also been nice to get back in the office, have a fully stocked kitchen at home, and not have another “hardest race you’ve ever done” looming over me.

What’s on your agenda for Spring and Summer 2025?

Ben: It’s going to be a packed season, full of events and races in California, with a few further afield. My fiancée is a badass gravel racer, so I’ll be tagging along to some of her events and giving it my best shot. I’ve also got some MTB races on the calendar—closer to the CX effort and technical style that I love.

That said, I’ve already raced three times since my last CX race on January 5th. The first two rounds of the Grasshopper Adventure Series, plus a mountain bike XC race thrown in there. 

How are gravel races like the Grasshoppers different on your mind and body?

Ben: I’ll be the first to admit—I don’t love gravel racing. Riding off-road for a long time? No problem. The racing part? That’s the challenge. But that’s why we do it, right?

Mentally, a five-hour, single-loop race is a huge shift from an all-out, one-hour, 7–9 lap CX race. In CX, you’re dialing in every corner, nailing gearing, and tackling obstacles with precision. In gravel, it’s about being prepared for anything. Since my schedule doesn’t allow for pre-riding most gravel courses, I just have to make my best guess and send it.

Physically, it’s the opposite side of the power curve from CX. In a cross race, I can spend an hour at 185bpm, with over 30 minutes of that at 600+ watts. It’s all or nothing. Gravel racing requires a much deeper endurance base—being efficient at your “tempo” is key. I’ll add some longer rides and tempo efforts into training, but mostly, I’ll stick to my short and sharp CX-style training and just hang on for dear life during the races.

What about your bike? You’ve got a Mosaic hardtail, a proper GT-1 45 gravel bike, and of course, your XT-1 cyclocross bikes to choose from, and we see pros line up with all sorts of bikes given the circumstances. What was your setup and why?

Ben: Between the three bikes, I can cover just about every event I want. Leading up to a race, I’ll do most of my training on the bike I’ll compete on—even if that means logging road miles on my gravel or MTB. I also try to match my training routes to race conditions as much as possible.

• XT-1 (Cyclocross & Road): The XT-1 is my go-to for CX, road, and some smoother gravel races. In CX mode, it’s a 1x with tubular tires, no bottles. For road, I swap to a double chainring, 34mm tires, and a longer 110mm stem (from a 100mm). We optimized the geometry around 33mm tires for max snappiness, so while it can fit up to 42c tires, the handling changes enough that I prefer my GT-1 45 for that.

• GT-1 45 (Gravel): This is my primary summer off-road race bike. It has a longer wheelbase, more tire clearance, and a tubeset that adds comfort over long days in the saddle. It’s planted on high-speed gravel descents but still playful on singletrack. I run a 1x setup—usually a 46T or 48T chainring with a 10-52T cassette—and always 45mm tires. The longer top tube lets me get into a more aggressive, aero position compared to the XT-1.

• MT-1 (MTB & Technical Terrain): A lot of the riding around SF can be done on a drop-bar bike, but why underbike when you can rip on a hardtail? No surprise—I use this for MTB events. It’s built with a fairly neutral geo to be racy yet capable on modern technical courses. Since I burn a lot of road miles to reach trails, I run a 36T up front with a 10-52T cassette. A 120mm fork smooths out the chatter, and honestly, the bike gets smoother the faster you go. Tires are 2.4s—because more volume is always better.

What other gear or kit-related adjustments do you make for gravel racing?

Ben: The worst thing about gravel? No pit bike!

I’ll wear an aero helmet for free speed, but otherwise, it’s just about dressing for the weather—same as CX. The biggest difference is nutrition. I’m firmly in the MAX CARBZ PER HOUR camp, so I fill my bottles with science fluid and carry flasks of goop and syrup to keep the engine running hot. Oh, and flat repair essentials—because, again, no pit.

What about race-day routine? Prepping for an hour all-out effort seems pretty different from a four-hour dirt road race.

Ben: I’ve never set a 5:30 a.m. alarm for a CX race. But for an 8 or 9 a.m. gravel start? Gotta wake up early to get that last bit of fuel in.

Warm-ups are also way more relaxed for gravel. Usually 20–30 minutes to get the blood flowing and a quick 5-minute build to spike the heart rate. No need to waste precious energy—we’ll be riding for a long time.

How do you approach a race like the Grasshopper Huffmaster tactically? Was it different from how you’d approach a European World Cup CX race—or even a U.S. CX race?

Ben: This is like comparing apples to cucumbers.

In CX, I’m confident at the start line. At Huffmaster, early in the gravel season, I knew my fitness wasn’t quite tuned for that style of racing. My plan? Eat a lot, follow moves until the first climb, climb hard, descend harder, and see what happens.

And? How did it all play out?

Ben: A slight headwind kept our group of 60 together for the first 30 miles. Then, we hit the 10-minute climb, and the race exploded. My goal was to stay in touch, rally the descent (I have the sixth-fastest time on it), and link up with a group.

But a small rock on the tire bead had other plans. A slow leak left me limping to the feed zone to plug it, costing me 2:30 and taking me out of contention. I rode with my fiancée for a bit, chased groups where I could, and still gave it my best effort.

At the end of the day, riding bikes is a good day—especially on these bikes.

If you were to gaze into the smoldering maw of an active volcano, it would look a lot like Jack’s GT-1 i45 in our latest Artist Series #6 colorway: Lava. With a metallic base coat of fiery orange and golden yellows accented by randomly applied Scale patterns of smoky grey and black, this bike is almost too hot to touch.

Introduced in 2024, Scale is already one of our most popular finishes and has been showcased on Brennan Wertz’s Gravel National Championships winning GT-1 iAR and the GT-1 i45 he raced at Gravel World Championships.

The Scale artwork was designed, prototyped and painted by Mosaic founder Aaron Barcheck using a randomized, stamped paint technique requiring over 20 hours of painting and sanding. No two are exactly alike.

With Scale, varying the base color can create a dramatically different effect. Jack’s infernal GT-1 i45 is undeniably eye-catching, but the same Artist Series finish in NightShade with  a black base and subtle tonal silver, blue and purple accents results in a very different look and feel.

We’re up to eight standard Scale base colors and of course, there’s the option to work with the Mosaic design team to come up with your own colorway, as Jack did for his Scale Lava GT-1.

Scale is available now by request on any new Mosaic, or as a repaint on an existing Mosaic. Contact your Mosaic dealer for more information.

Your chance to snag a Mosaic at a great price! We’re making room for new builds and a refreshed demo fleet, so we’re offering up a selection of brand-new, never-ridden show bikes, along with some lightly ridden, but well-maintained demo bikes. You’ll find models in various sizes, build specs, and price points.

Bikes are sold as-is, on a first-come, first-served basis.

If you’re interested or have any questions, shoot us an email at info@mosaiccycles.com. Please include the Model & Size in the subject line.

GT-2 45 GRX Ltd (54cm)

Frame: Mosaic GT-2 45 // Stock 54cm

Finishwork: Knockout – Pearl Kashima

Groupset: Shimano GRX Ltd. Rear Derailleur, 11s Mechanical, GRX Ltd Crankset (40T, 172.5mm), XT M8000 Cassette (11-40), GRX Ltd Shifter/Brakes

Wheelset: Shimano RX880 GRX Carbon Wheelset

Cockpit: Thomson Elite Stem (100mm), Thomson Elite Seatpost (25mm offset), Pro Vibe Handlebar (42cm)

Accessories: WTB Silverado Saddle, WTB Nano 40mm Tires

Condition: New.

Notes: This bike and all components have zero miles. Brand new & unridden, just assembled for photos.

Price: $7200

View more photos here.

 

GT-2 X GRX Ltd (58cm)

Frame: Mosaic GT-2 X // Stock 58cm

Finishwork: Tri Fade

Groupset: Shimano GRX Ltd. Rear Derailleur, 11s Mechanical, GRX Ltd Crankset (40T, 172.5mm), XT M8000 Cassette (11-40), GRX Ltd Shifter/Brakes

Wheelset: Shimano RX880 GRX Carbon Wheelset

Cockpit: Thomson Elite Stem (100mm), Thomson Elite Seatpost (25mm offset), Pro Vibe Handlebar (42cm)

Accessories: WTB Silverado Saddle, WTB Ranger 29×2.25 Tires

Condition: New.

Notes: This bike and all components have zero miles. Brand new & unridden, just assembled for photos.

Price: $7200

View more photos here.

 

GT-2X – MADE Show Bike

Frame: Mosaic GT-2 X // Custom Geometry (Low Stack 62)

Finishwork: Artist Series Scale – Moss

Groupset: SRAM GX Transmission // 175mm Crank // 10-52 Cassette // SRAM Force AXS Shifters & Brakes

Wheelset: Your choice of ENVE Wheelset. G23, 3.4, or 4.5

Cockpit: Mosaic Titanium Stem (90mm), Mosaic Titanium Seatpost (Zero Offset), ENVE Gravel Carbon Handlebar (42cm)

Accessories: Fizik Argo Saddle – your choice of WTB Ranger 2.25, or WTB Resolute 50 Tires

Condition: New.

Notes: Brand new, never ridden, MADE show bike.

Price: $11,500

View more photos here.

 

 

GT-1 AR 52cm Demo

Frame: Mosaic GT-1 AR // Stock 52cm

Finishwork: Knockout – Pearl Mustard Gold (Gloss)

Groupset: 11-Speed Ultegra/GRX Di2 // 11s GRX Di2 Rear Derailleur w/ Clutch // 50-34, 172.5mm Cranks // 11-34 Cassette // Ultegra Di2 Shifters & Brakes

Wheelset: Custom Built, WTB Carbon Rims & WTB Hubs

Cockpit: ENVE 27.2, Zero Offset SP, ENVE Carbon Stem (100mm), ENVE Compact Road Bar (42cm)

Accessories: Chris King Matte Turquoise Headset, WTB Silverado Saddle, New WTB Riddler 700x37mm tires.

Condition: 6/10

Notes: This bike has some scrapes & scuffs, but it is in mechanically good condition. If you want a no-nonsense, do it-all build that you don’t have to worry about, this bike is for you. There are several scratches in the paint (pictured), as well as the shifters & crankset. The cassette, chain and chainrings were replaced within the last 1,000 miles and are in great shape. Photos show the extent of cosmetic damages.

Price: $5000

View more photos here.

 

Aaron Barcheck Signature Edition RT-1d

Finishwork: Knockout // McLaren Orange // Matte

Groupset: Shimano Dura Ace 9100 Rear Derailleur, 11s Di2, Dura Ace 9100 Crankset (52/36, 175mm, Dura Ace 9100 Cassette (11-30), DuraAce 9100 Shifter/Brakes.

Wheelset: Shimano Dura Ace 9170 C40 Wheelset

Cockpit: ENVE 30.9 Zero Offset SP, ENVE 120mm Stem, ENVE Standard Drop Handlebar (44cm)

Accessories: WTB Silverado Saddle, Donnelly CDG 700x30mm tires.

Condition: 6.5/10

Notes: Aaron Barcheck’s RT-1d. This bike is well ridden and shows normal signs of wear. Used, but not abused, all components in good working order for many more miles of enjoyable riding.

Price: $5000

View more photos here.

 

GT-2 45 GRX Ltd // 54cm (Brand New, Unridden)

Finishwork: Mosaic Factory Finish // Titanium

Groupset: Shimano GRX Ltd. Rear Derailleur, 11s Mechanical, GRX Ltd Crankset (40T, 172.5mm), XT M8000 Cassette (11-40), GRX Ltd Shifter/Brakes

Wheelset: Shimano RX880 GRX Carbon Wheelset

Cockpit: Thomson Elite Stem (100mm), Thomson Elite Seatpost (25mm offset), Pro Vibe Handlebar (42cm)

Accessories: WTB Silverado Saddle, WTB Nano 40mm Tires

Condition: New, unridden.

Notes: This bike and all components have zero miles. Brand new & unridden, just assembled for photos.

Price: $6600

View more photos here.

 

 

Designed, prototyped, and painted by Mosaic founder Aaron Barcheck, Scale is a creative and unique spin on the Knockout Layout using a randomized, stamped paint technique.

Scale marks the sixth edition of the Mosaic Artist Series and features a cohesive mix of colorful chaos with each variation. Scale is available in 8 unique colorways, with the option to work with the Mosaic design team to come up with your very own personalized scale design.

Scale is available now by request on any new Mosaic, or as a repaint on an existing Mosaic. Contact your Mosaic dealer for more information.

Check out the 8 current designs below. Go loud with Ultraviolet, or subtle with Nightshift, you can’t go wrong…