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Siablo GR

Gravel | Gravel | Alloy | 700C

KEY FEATURES

Custom Triple Butted hydro-formed 6061 Alloy frame, disc mounts
Silverback Carbon fork, tapered steerer, disc mounts
Stan's Grail S1 700c rims
WTB Riddler 45c, DNA Compound
Shimano 105 ST5800
Weight: 10.38kg

Color

FIND OUT ABOUT SILVERBACK'S WARRANTY Replacement Derailleur Hanger Available Here

FAQ
What type of terrain is the Siablo GR suitable for?

The Siablo GR is best suited to on-road and light off-road use.
Can I fit a kickstand to my Siablo GR?

Yes, the Siablo GR has an 18mm kickstand mount. Compatible with the Speedkit Kickstand CL-KA98 on Speedlab.
Can I fit 27.5" wheels to the Siablo GR?

Yes, the maximum clearance is 1.8".
What is the low gear capacity for the rear derailleur?

The derailleur low gear capacity is 28T.
What type of brakes does the Siablo GR have?

The Siablo GR has mechanical disc brakes.
What is the maximum tyre clearance of the Siablo GR?

The Siablo GR has a maximum tyre clearance of 45C.

OVERVIEW
WHY IT'S BEST
SPECIFICATIONS
GEOMETRY & SIZE CHART
REVIEWS
DOWNLOAD PDF

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 carbon fork

The SBC carbon 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.

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.
The GR frame has space for 2 full oversized water bottles inside the frame.
The compact frame is nimble, even though the geometry is very comfortable on long rides.
The lightweight SBC carbon fork has an integrated fender mounting hole, as well as 2 more water bottle or accessory mounts.
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.

Disclaimer: Due to Covid-related scheduling and component availability challenges, bike specifications are subject to change without notice. Specifications may not be exactly what is shown in the photo.

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.

map	type(mm unless specified)	XXS	XS	S	M	L	XL
	Rider height(cm)	144-154	152-164	164-172	170-178	178-188	185-195
	Rider inseam(cm)	65-70	69-74	74-78	77-81	81-85	84-89
A	Seat tube c/t	440	475	510	530	550	580
B	Seat tube angle	74	74	74	74	74	74
C	Head tube angle	70	70	70	70	70	70
D	Top Tube	570	578	585	593	600	608
E	Reach	414	416	418	420	422	424
F	Chainstay length	445	445	445	445	445	445
G	bb height	293	293	293	293	293	293
H	head tube length	100	120	140	160	180	200
I	stack	527	546	565	584	602	621
J	standover	725	754	783	802	822	847
K	Wheelbase	1068	1076	1085	1094	1103	1112