Grit SS - Fully Integrated Gravel
$5,650.00 AUD - $14,920.00 AUD
One bike. Fast everywhere.
The Grit SS is Bossi’s high-performance titanium gravel bike for riders who want road speed, gravel capability, and practical utility in one platform.
Fast in road trim, composed off-road, and fully equipped for long mixed-surface rides, it is built for riders who want one bike to cover more of their riding.
KEY FEATURES
The Grit SS is built for riders who want a faster, more focused gravel bike for mixed-surface riding. Its aerodynamically optimised frame helps it hold speed efficiently on the road, while the deeper tube profiles provide the stiffness needed for direct power transfer under load. Paired with purposeful gravel geometry, it gives the bike a fast, controlled character across dirt, hardpack and rougher roads.
The Grit SS features a long wheelbase and a balanced front-end geometry to create confident and stable handling on loose and unpredictable surfaces. A higher stack results in a more balanced riding position, with better visibility and more even weight distribution across the bike. Up front, a 50mm fork offset reduces trail to maintain sharp and accurate steering without becoming nervous. The bottom bracket drop is set to balance ground clearance with a lower centre of gravity, helping the bike feel planted without impeding its off-road capability.
Fully integrated cable routing, 3D-printed UDH dropouts, a T47 bottom bracket, clearance for modern high-volume tyres, and a 27.2mm seatpost give the Grit SS the standards and compatibility expected of a contemporary gravel platform. The result is a cleaner bike, broad component choice, support for suspension and dropper posts, and long-term relevance as gravel setups continue to evolve.
The Grit SS is designed to support a wide range of configurations. It can be set up for fast gravel and all-road riding, while still carrying the mounting provision needed for longer rides and bikepacking use. Rack and mudguard mounts, triple mounts on the fork, and compatibility with both one-piece and two-piece cockpit systems give the platform genuine flexibility, with details like integrated computer mounting helping complete a clean and highly functional front end.
The Grit SS combines 3D-printed titanium junctions, hydroformed tube profiles and linished welds to create a frame with a level of shaping freedom and refinement not possible through more conventional construction. Those processes allow the bike to carry aerodynamic forms and deeper profiles for improved speed and stiffness, while also giving the frame its clean, highly resolved appearance. Beneath that more advanced structure, titanium remains the material solution to gravel’s real demands: durability, corrosion resistance, vibration damping and the kind of ride quality that helps reduce chatter and fatigue over rougher surfaces and longer distances.
DESIGN BRIEF
Fast. Direct. Sculpted. Integrated. Durable. Versatile. Purposeful.
The Grit SS was developed as a high-performance titanium platform for road, all-road, and gravel use.
Gravel bikes have become faster, more integrated, and more road-influenced. The opportunity was to create a titanium frame that could carry speed on sealed roads and hardpack while retaining the clearance, durability, mounting points, and ride quality required for serious gravel riding.
The design objective was to support two distinct setups from the same frame. With gravel wheels and larger tyres, the Grit SS prioritises stability, traction, damping, and control across dirt, hardpack, and broken roads. With road wheels and deeper rims, the frame takes on a sharper all-road character, supported by aero-profiled tubing, integrated routing, and increased frame stiffness.
Hydroformed titanium tubes allow deeper, more directional profiles through the front triangle, improving stiffness and supporting aerodynamic forms. 3D-printed titanium junctions create cleaner structural transitions between the head tube, down tube, yoke, and dropouts. These parts carry the integration, internal routing, UDH compatibility, and tyre clearance in a more resolved structure.
The utility was retained deliberately. Generous tyre clearance, practical mounting points, T47, UDH, and titanium durability allow the Grit SS to be built for fast all-road riding, gravel, longer mixed-surface routes, or loaded setups without narrowing the frame to one use case.
The result is Bossi’s most complete road-and-gravel platform: fast in road trim, stable off-road, practical for longer rides, and durable for long-term use. It is the closest Bossi gets to a true one-bike platform.
HOW IT RIDES
The Grit SS is a high-performance gravel and all-road platform designed to cover road and gravel with equal intent. In road trim, it rewards speed, efficient power delivery, and fast changes in pace. In gravel trim, it prioritises stability, control, and durability across hardpack, broken roads, and longer mixed-surface routes.
The fit is road-influenced without becoming overly aggressive for off-road use. A balanced stack and reach place the rider in a performance position that supports power transfer, visibility, and upper-body control over uneven terrain. The position is efficient for sealed-road riding, while remaining stable and manageable when the bike is fitted with larger tyres or ridden over rougher surfaces.
The handling geometry is central to the Grit SS brief. A 71.2° head tube angle and long front-centre reduce toe overlap, improve stability with larger tyres, and support confident handling at speed. With high-volume gravel tyres, trail sits in a stable gravel range for control on dirt and broken surfaces. With narrower road tyres and deeper road wheels, trail reduces and the bike takes on a sharper all-road character. The 76 mm bottom bracket drop lowers centre of gravity for cornering stability, while the long rear-centre supports tyre clearance, traction, and loaded utility without dulling response under power.
The frame construction sharpens the ride compared with a conventional round-tube gravel frame. Hydroformed aero profiles and 3D-printed titanium junctions improve stiffness through the front triangle, head tube, and bottom bracket areas, increasing precision under load and helping the bike hold speed in road trim. Titanium’s damping remains central to the ride quality, managing vibration and repeated impacts so the bike feels controlled off-road and less fatiguing over distance.
3D-printed titanium head tube
The oversized 3D-printed head tube is central to the Grit SS, allowing a stiffer, more confident front end and giving the frame its distinctive integrated form.
3D-printed yoke
A prinetd yoke not only allows for wider chainring and tyre clearance but maintains internal cable routing and produces a seemless integrated finish.
Hydroformed aero tubes
The hydroformed tube set gives the Grit SS its aerodynamic profile, purposeful stiffness and highly sculpted form
Fully Integrated
Delivers a cleaner front end and a more resolved overall presentation.
Linished Welds
Welds are linished smooth by hand for a near seamless connection. The process is highly labour-intensive, but it is central to the Strada SS’s refined finish.
CORE BUILDS
1. Rival AXS XPLR E1
- Bossi Grit SS frameset
- SRAM Rival AXS E1 XPLR / or Eagle groupset (matches cassette selection)
- Bossi Nomad carbon wheelset
- Cockpit selection configured in the product options above
- Prologo Nago saddle
- Pirelli Cinturato M Gravel tyres
- Bossi black bartape
- Tubeless
2. GRX Di2
- Bossi Grit SS frameset
- Shimano GRX Di2 825 2x / 827 1x groupset (matched to gearing selection above)
- Bossi Nomad carbon wheelset
- Cockpit selection configured in the product options above
- Prologo Nago saddle
- Pirelli Cinturato M Gravel tyres
- Bossi black bartape
- Tubeless
3. FORCE AXS E1
- Bossi Grit SS frameset
- SRAM Force AXS E1 XPLR/ Eagle groupset (matches cassette selection)
- Bossi Nomad carbon wheelset
- Cockpit selection configured in the product options above
- Prologo Nago saddle
- Pirelli Cinturato M Gravel tyres
- Bossi black bartape
- Tubeless
4. RED AXS E1
- Bossi Grit SS frameset
- SRAM RED AXS E1 XPLR / Eagle groupset (matches cassette selection)
- Bossi Nomad carbon wheelset
- Cockpit selection configured in the product options above
- Prologo Nago saddle
- Pirelli Cinturato M Gravel tyres
- Bossi black bartape
- Tubeless
Core Builds are configured through the options in the product purchase panel at the top of this page. Each build includes a curated specification, with selected rider-specific choices such as cockpit sizing, gearing, wheelset, tyres, saddle, and other available options confirmed before checkout.
Each Bossi is built to order. Once your order is placed, we will review your selected specification, confirm component availability, and provide an estimated build date. Typical Core Build lead times are 2–4 weeks, depending on frame availability, component supply, and current workshop scheduling.
Core Builds are limited to the options shown on this page. If you have a specific specification, component request, or more involved build in mind, please contact us to discuss a Custom Project.
- 3D printed aero 6AL/4V head tube
- Hydroformed 3AL/2.5V aero down tube
- Hydroformed 3AL/2.5V top tube with bag mounts
- Ovalised and tapered 3AL/2.5V chainstays
- Tapered 3AL/2.5V seatstays with rack mounts
- 3D Printed 6AL/4V size specific dropouts
- 3D printed 6AL/4V chain stay yoke
- CNC 6AL/4V 86mm T47 bottom bracket
- Fully integrated cable routing
- 3x bidon mounts
- Triple fork rack mounts
- 12mm thru axle (12x100mm front, 12x142mm rear)
- Flat mount disc brake
- SRAM UDH (supplied with direct mount hanger option)
- 27.2mm seat post
- Seatstay bridge
- Chainstay bridge
- Full fender mounts
- Chain holder on seatstay
- CNC headtube logo
- Laser engraved downtube logos
- Brush finish
- 700x50c tyre clearance, 27.5” x 2.2”
- Electronic groupsets only
Bossi frames are offered in sizes 50, 52, 54, 56, 58 and 60. The right size for you will depend on more than height alone, including your proportions, flexibility, riding style and fit preferences.
As a general guide:
50 suits smaller riders, typically around 160–168 cm
52 suits riders around 168–173 cm
54 suits riders around 173–178 cm
56 suits riders around 178–183 cm
58 suits riders around 183–188 cm
60 suits taller riders, typically around 188–196 cm
These height ranges are approximate only. Some riders may fall between sizes depending on leg length, torso length, arm length, mobility and desired riding position.
If you are between sizes, the best option will depend on how you want the bike to fit and feel. A smaller size may offer a slightly more compact and responsive fit, while a larger size may provide a little more reach and stack.
If you are unsure which size is right for you, we recommend getting in touch before ordering. We are happy to review your current bike fit, body dimensions and intended use to help guide you into the right size.
Built in the Details
35 hours
Total production time for a single frame
From tube preparation and machining through 3D printing, welding, finishing and final QC.
7 Hours
Time required to weld a single frame.
A double-pass welding process ensures strength, consistency and a cleaner final result.
8 hours
Time spent linishing and finishing each frame.
Every tube-to-junction weld is smoothed by hand for a near seamless connection and highly resolved finish.
13 checks
Quality control inspections before approval.
From individual parts to the finished frame, every stage is inspected and confirmed.
90% by hand
Share of the production process carried out manually.
Cutting, mitring, welding, finishing, alignment and final detail work are all completed by skilled hands.
ISO 4210 +15%
Tested beyond the industry standard.
Each production run is validated for strength and durability above ISO requirements.
FREQUENTLY ASKED QUESTIONS
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Use the size guide on this page as a starting point. The right size will also depend on your proportions, flexibility, riding style and fit preferences. If you are unsure, get in touch and we can help guide you based on your measurements and current bike.
If you've had a professional bike fit before, email us your report and we will guide you through component selection
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Yes. Bossi framesets can be purchased on their own, or as a complete bike as one of our Core Builds.
We employ industry standards in our frame designs ensuring wide compatibility with components and ease of assembly by any qualified mechanic. -
Each frameset includes the frame, carbon fork, carbon seatpost, headset, expansion plug, alloy spacers, thru-axles and seatpost clamp.
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Core Builds are complete bikes with carefully considered specifications chosen to suit the intended character of the model.
Custom Projects offers a greater level of customisation for riders who want to curate their build in more detail, include non-standard finishes,
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Yes. All complete bicycles are built to order here in Australia. Once your order is placed, we confirm sizing, specification and component availability before the build begins. Our current lead time on complete bikes is roughly 2-4 weeks.
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Lead times vary depending on frame availability, selected components and current workshop scheduling. Framesets are typically instock and fulfilled within 48 hours, while complete bicycles require additional time for assembly, setup and final quality control. We will confirm the expected timeline after purchase. On average, complete bicycles are fulfilled within 2-4 weeks.
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For Core build orders, you can select your preffered gearing, crank length, and cockpit size. For further customisation, please contact us and we can discuss the requirement of your custom project and quote accordingly.
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Yes, we ship internationally. For more information on shipping rates, delivery timeframes, duties and taxes, please visit our Shipping page or get in touch before ordering.
SHIPPING -
Yes. If you are deciding between frameset, Core Build or a more custom configuration, we are happy to help guide you based on your riding, fit requirements and budget. Contact us and we'll arrange a consultation.
