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    • OVERVIEW
    • WHY IT'S BEST
    • SPECIFICATIONS
    • GEOMETRY & SIZE CHART
    • REVIEWS
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    A super versatile alloy gravel bike.

    The Siablo GR has been designed from the ground up as a gravel bike, utilizing a different frame to the Siablo CX, the GR exceeds the broad demands put on the gravel category. Designed with current trends and future insight the Siablo GR is an extremely versatile bike, capable of fitting up to 700x47c tyres or 650b road plus should you want the extra comfort. Rack mounts, threaded BB, and mechanical disc brakes mean that the Siablo GR is practical and easy to service with basic tools.

    Hydro formed butted alloy frame

    Siablo GR's frame is manufactured from hydro formed, butted 6061 alloy tubing making for a very strong frame. For this kind of application - a gravel frame, a strong aluminium frame is a reliable choice. Hydro forming is a process to shape alloy tubing from the inside, using pressurized water and/or oil into a negative mold cavity resulting in stronger thin wall tubing.

    SBC fork

    The SBC Fork has all-round performance, while retaining absolute functionality. Equipped with fender mounts to protect both rider and components from unwanted debris spray in wet conditions. Fitted with bottle bosses on both stanchions, it greatly increases hydration capacity of the frameset. The bosses also double up as pannier mounts to increase load capacity of the Siablo GR.

    DESIGNER NOTES.

    THRU AXLES

    DISC BRAKES

    ALLOY FRAME

    GRAVEL FOCUSED GEOMETRY

    HYDRATION

    CARBON RIGID FORK

    FENDER RACK MOUNTS

    INTERNAL CABLE ROUTING

    WHY IT’S BEST.

    1. Siablo GR is designed to require minimal maintenance, and features reliable, quality components and tubeless ready wheels. No one wants to be stranded on an adventure.
    2. The GR frame has space for 2 full oversized water bottles inside the frame.
    3. The compact frame is nimble, even though the geometry is very comfortable on long rides.
    4. The lightweight SBC carbon fork has an integrated fender mounting hole, as well as 2 more water bottle or accessory mounts.
    5. Cable disc brakes are easy to adjust and maintain, and works well in all weather and terrain conditions.

    ENGINEERING NOTES.

    Alloy GR Frame

    Siablo GR is a stand alone gravel focused frame with unique geometry. The frame is designed to deal with the demands of the modern gravel enthusiast.

    Gravel focused Geometry

    The wheelbase of the frameset is semi-short to retain a trail capable bike, with good weight distribution under load. A slack head angle makes for a terrain capable front end that will roll challenging obstructions. The steeper seat angle aids in ascending more efficiently, with better power transfer at variable gradient increase. The GR is super capable and wants to be challenged.

    Internal routing

    Internal routing keeps the cockpit neat and cables out of harm's way. Also full length housing internal cables have less chance s of dirt ingression, keeping maintenance down.

    Thru axle dropouts

    Thru-axles effectively bolt the wheel to the frame or fork. By comparison, QR systems only slot in place, and compress the dropout to retain the wheel. The increased strength and stiffness of thru-axles can be attributed to both the increase in effective engagement area and the fixing mechanism to the dropout. The thru-axle system is significantly safer, with fewer points for potential failure.

    SBC fork

    The SBC Fork has all-round performance, while retaining absolute functionality. Equipped with fender mounts to protect both rider and components from unwanted debris spray in wet conditions. Fitted with bottle bosses on both stanchions, it greatly increases hydration capacity of the frameset. The bosses also double up as pannier mounts to increase load capacity of the Siablo CF.

    Disc brakes

    Siablo GR features mechanical cable actuated disc brakes. Disc brakes offer all-weather performance, great modulation

    SPECIFICATIONS.

    DRIVETRAIN
    Crankset Shimano FC-RS510, 50x34t
    Cassette Shimano 105 CS-5800 11-28t, 11 Speed
    Rear Der Shimano 105 RD-5800, Short Cage, 11 Speed
    Front Der Shimano 105 FD-5800
    Shifters Shimano 105 ST5800
    Bottom Bracket BSA
    SUSPENSION
    Fork Silverback Advanced Dynamics Carbon Fork, 12mm Thru Axle Dropouts, Disc Mount
    WHEELS
    Hubs Alex Rims Bear Pawls BRD
    Rims Stan's Grail S1 700c
    Tyres WTB Riddler 45c, DNA Compound, 60Tpi, Aramid Bead
    COCKPIT
    Seatpost Surface Aluminium, Black
    Saddle Surface Ergo, Carbon Fiber Base
    Handlebar Surface Alloy Handlebar, Dia:31.8mm, Reach: 70mm, Drop: 120mm
    Stem Surface Alloy Stem, 31.8mm, Rise 7°
    FRAME
    Frame Silverback Engineered Custom Triple Butted 6061 Aluminium Tapered 1-1/8"-1.5" Headtube, Integrated Headset, 12mm Thru Axle Dropouts, Flat Mount Disc Mounts
    BRAKES
    Brake set Shimano 105 ST5800
    WEIGHT
    Weight 10.38kg (Medium Frame, with tubes, without pedals)
    Weight Limit 125kg - combined weight of bike and rider (including all kit).

    Disclaimer: Due to the nature of bike manufacturing, specification, finishes and price may be subject to change without prior written notification.

    FIND YOUR FIT

    FIND YOUR FIT

    Proper bike fit is as important as getting the right bike for the job. Long term comfort and performance can be greatly improved with the right size bike. This acts as a guide only, so if you are unsure, please visit your Silverback reseller to be professionally measured and sized for the perfect fit.

    GEOMETRY.

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