gravel titanium bike S-PARTS Titanium Alloy Gravel Bike Frame
SKU: 5251186437
gravel titanium bike

gravel titanium bike S-PARTS Titanium Alloy Gravel Bike Frame

Sale price$23.98 Regular price$26.65
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Description

gravel titanium bike S-PARTS Titanium Alloy Gravel Bike FrameWHY GRAVLE? At the inception of designing the first mass produced titanium alloy bike frame for S PARTS, we contemplated two questions: What type of bicycle is best suited for titanium alloy construction? What kind of riding experience and lifestyle should an exceptional titanium alloy bicycle provide? [Choose, Think, Create] Titanium's inherent mechanical properties provide a perfect balance between torsional rigidity and vertical damping. It ensures


WHY GRAVLE?

At the inception of designing the first mass-produced titanium alloy bike frame for S-PARTS, we contemplated two questions:

  1. What type of bicycle is best suited for titanium alloy construction?
  2. What kind of riding experience and lifestyle should an exceptional titanium alloy bicycle provide?

[Choose, Think, Create]

Titanium's inherent mechanical properties provide a perfect balance between torsional rigidity and vertical damping. It ensures the lateral stiffness needed for high power output during pedaling while absorbing vertical bumps from various complex terrains and filtering high-frequency vibrations. This makes it not only suitable for paved roads but also destined to break free from urban constraints and race through the wild. Whether it's short sprints or long journeys, these are its specialties. This reliable titanium alloy companion is always ready to join you on an adventure, embracing the mountains and rivers that await.

That's why "Gravel" is the most beautiful interpretation of a titanium bike.

CROSS CONTROL SYSTEM 2.0

This is the crowning design that we have meticulously developed and finally achieved for mass production. Years ago, when S-PARTS began its custom titanium frame business, we insisted on using a design where the seat stays connect to the top tube, which we termed "CROSS CONTROL" technology. This method effectively uses the passive deformation of metal to absorb road bumps in non-suspension frames. However, due to early technological limitations, we had to conservatively weld the connection between the seat stays and the seat tube. While this ensured the frame's strength, it significantly compromised the original goal of vertical shock absorption, which was undoubtedly frustrating.

For years, this issue has been on our minds, and the S-PARTS team never gave up on finding the optimal solution. In 2023, we introduced new hydraulic bending equipment and internationally advanced calibration and testing instruments. With these resources, we ventured into more daring tube and profile designs, using 3D software to simulate a completely disconnected structure between the seat stays and the seat tube, which we successfully achieved in simulations. This led to the creation of the "CROSS CONTROL 2.0" system we have today.

We chose slimmer seat stays, internally hydroformed to maintain support strength while providing ample clearance. This design allows for controlled physical deformation on rough roads, achieving the intended shock absorption function. To increase the contact area and vertical support strength at the weld points between the stays and the top tube, we used a special vertical pressing mold at both ends of the top tube. This created two elliptical cross-sections—one horizontal at the head tube and one vertical at the seat tube—achieving both aesthetic and functional benefits.

ASYMMETRIC REAR FORK

Traditional metal frames, when requiring compatibility with both large chainrings and wide tires, usually compress the drive-side chainstay to form a dent. This is an unavoidable compromise that inevitably damages the original tube wall structure, resulting in a loss of strength.

S-PARTS designed a connector CNC-carved from a single piece of titanium alloy plate, perfectly solving this issue in multiple ways:

  1. The solid titanium alloy connector provides higher connection strength than tube materials, ensuring drive-side pedaling rigidity.
  2. The 6mm wide plate offers considerable installation space for both tires and chainrings, allowing the GRAVEL frame to accommodate tires up to 42c and chainrings up to 48t.
  3. The asymmetric recessed design also provides more chain movement space, significantly reducing the chance of chain-to-chainstay collisions during extreme bumps.

Internal cable routing / CNC rear dropout / UDH derailleur hanger / T47 bottom bracket

The frame features a 52mm integrated headset with uniform diameter, supporting ACR and DCR systems for fully internal cable routing with both integrated and non-integrated handlebars.

The fully CNC-machined flat mount brake caliper installation base ensures high strength and precise mounting holes for quick and accurate setup, delivering sharp and powerful braking performance.

The entire series is equipped with the UDH direct mount dropout system, compatible with nearly all rear derailleurs on the market.

The T47 threaded bottom bracket, standard across the series, is the optimal solution for metal frames, offering excellent stability, pedaling stiffness, and minimal noise risk. For 24mm spindle specifications, it supports a fully hidden brake hose routing solution within the bottom bracket shell.

Frame Assembly Guidelines

Head Tube: Use upper and lower 52mm integrated bearing headsets, ensuring compatibility with ACR or DCR system internal cable routing.

Fork: Optimal fork specifications for this frame are a length range of 389-400mm (excluding suspension forks), an offset range of 48-55mm, and a maximum tire clearance >42c.

Bottom Bracket and Crankset: The frame's bottom bracket shell width is 68mm and requires a T47 external bearing bottom bracket. The specific model depends on the crankset used; please consult your retailer or S-PARTS official customer service. The frame supports a maximum chainring size of 48T.

Shifting and Braking: The frame is compatible with DI2, AXS electronic shifting systems, and similar electronic shifting products (not compatible with any mechanical shifting systems). The frame only supports FLATMOUNT disc brake systems.

Seat Post: Only compatible with 27.2mm diameter round seat posts.

Wheelset: Only compatible with 700c wheel specifications and 12mm thru-axle road wheelsets.

 

Gravel frame fatigue test report - Chinese

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 5251186437

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Reviewed in the United States on May 4, 2026
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elizabeth a hahn
Battle Creek, US
★★★★★ 4
nice quality but small is too small for a 22 lb pup
Color: Beige, Size: Small - 23”L x 23”W x 8”Th
gave 4 stars due to size, quality seems good, its very soft and thick as well as decent looking for the money, however the small says it fits up to 25 lbs and my 22 lb Frenchton (boston/frenchie mix) barely fits in it. In their defense if I didnt just pay attention to the weight and looked at the measurements then I would have bought a medium so its my fault too, but my advice if you have a dog over 20 lbs I would definitely get a medium
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Reviewed in the United States on February 10, 2026
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Maira G.
Waukegan, US
★★★★★ 5
Loved by both dogs!
Color: Dark Gray, Size: Large - 36”L x 36”W x 8”Th, Color: Dark Gray, Size: Large - 36”L x 36”W x 8”Th
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Reviewed in the United States on May 11, 2026
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Keith Newman
Draper, US
★★★★★ 5
Are they using it??
Color: Pink, Size: Medium - 30”L x 30”W x 8”Th
I bought this bed for my cats, of which I have 4. The bed fits 2 cats at a time snuggly if they do not mind sharing. The size I bought is a medium. The bed is a “dog” bed but the cats love it more than any other bed. It is very soft to touch but provides a lot of support. Its depth seems perfect for cats. This bed is rarely unoccupied 😆. I just bought a second one before a riot starts!
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Amazon Customer
Charlottesville, US
★★★★★ 5
Good buy✨
Color: Black, Size: Medium - 30”L x 30”W x 8”Th, Color: Black, Size: Medium - 30”L x 30”W x 8”Th
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