Tetra Fat Mountain Tandem
Snowy banks and sandy beaches, Fat does it all
Frame starting at $10,500
Strength • Build • Performance • Geometry • Build Kits • Technical Specs
Durability and Capability
The Tetra Fat Mountain Tandem shares its origin with our other Tetra Mountain tandems. Utilizing high modulus carbon, we can create a supple ride feel that remains burly and strong enough to support a fat tire platform. Our fat bike rear end is integrated into our standard tubing style with a unique process that pushes the boundaries of what a fat bike can do.
Define Your Build
The Tetra Fat Mountain Tandem is compatible with 26″ wheel size, rigid or suspension forks, and custom sizing to offer versatility to the rider. Fat tires enable the tandem to have a ‘float’ like feel as it rides through snow, sand, and even dirt smoother than any other Mountain tandem in our line up.
Outlast and Perform
Our wrapped lug design provides a level of comfort and compliance that procures an astounding ride quality that few other bikes can deliver. Through more than 30 years of research, development, and advancements in the carbon bicycle industry, we’ve perfected our unique manufacturing process to develop the perfect tailored ride for every tandem team.
Build Kits
Our expert-selected build kits utilize your favorite components from the likes of SRAM, Shimano, Campagnolo, and more to deliver a well rounded package while eliminating the guess work related to tandem construction and specifications. Each unique build kit is thoroughly tested to ensure maximum reliability and performance. See available build kits for this model.
Geometry
Mountain Tandem Geometry
| Sizes | Size | Top Tube | Seat Angle | Stand- over Ht. | Front Center | Head Tube Length | Size | Stand- over Ht. | Seat Angle | Boom Tube |
| Small/Small | 45 | 58.4 | 73.5 | 78.1 | 66.8 | 12 | 40 | 69.7 | 73.5 | 72.3 |
| Medium/Small | 48 | 60.5 | 73.5 | 80.5 | 68.5 | 12 | 40 | 71.2 | 73.5 | 72.3 |
| Large/Small | 51 | 63.5 | 73 | 84.2 | 70.6 | 15 | 40 | 72.7 | 73.5 | 72.3 |
| Large/Medium | 51 | 63.5 | 73 | 84.2 | 70.6 | 15 | 43 | 74.2 | 73.5 | 72.3 |
| XLarge/Medium | 54 | 66 | 73 | 87.5 | 72.6 | 18 | 43 | 75.7 | 73.5 | 72.3 |
All frames have 33cm (13″) bottom bracket ht, 43cm (17″ chainstays)
Wheel/tire size of this chart: 27.5(650B) wheel size with 2.25″ (57mm) tire.
Need Custom Geometry or Need Help Deciding?
Build Kits
Our Build kits are designed to compliment your Tandem with the best that the industry has to offer. We spec out each build with top level components that meet our standards of excellence and performance.
Our build kits include all parts and components including headset, stem, seatpost, bar tape etc. Size specific parts can be decided upon communication with us through the sales process. Prices do not include wheels. Customer must source pedals and saddles independently. Contact us for full build sheets.
SRAM AXS 1X Eagle Flat Bar, Hydraulic
Component Highlights – SRAM AXS X01 Eagle 1x12s, Hydraulic SRAM G2 Ultimate brakes, Ignite Catalyst cranks, Carbon cockpits, Praxis bottom bracket, chain drive
$4,415
Technical Specs
Headset – 44mm
Dropouts – Titanium Integrated (148 Boost spacing available)
Bottom Bracket (Captain) – Eccentric 54mm shell (to be used on with Problem Solvers Bushnell Eccentric)
Bottom Bracket (Stoker) – English 68mm BSA type shell
Brake Mount Type – Post Mount 180 Direct
Seatpost Diameter – 27.2mm
Front Derailleur Clamp – 35mm
Rear Derailleur Hanger – Affixed Titanium
Industry Leading Warranty
It’s no secret that Calfee Design bicycles last a long time. We understand the importance of longevity in the cycling world, and engineer are frames to withstand the test of time. This is not a guarantee we take lightly. All new Calfee Design bicycles are backed by a 25 year warranty.
Contact Us to Begin Building Your Dream Tetra
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