Cannondale Topstone Carbon 2 GRX 2x 2025 Obsidian Gravel Bike

Available with Cannondale in the sizes shown above. Expect delivery within 8-9 working days of placing an order.

The best gravel bike for anything from dirt roads to singletrack trails. With the grip and comfort of the Kingpin suspension, nothing is off-limits.

Lightweight full carbon frameset with Kingpin rear suspension, Proportional Response size-specific construction, and StashPort downtube storage

Smooth, reliable, shifting from Shimano’s 2×12-speed GRX820 – their top-end mechanical gravel groupset

Light and fast wheelset with WTB KOM Team rims, Shimano hubs, and WTB Riddler 45c gravel tires

Cannondale’s 2 carbon seatpost and 2 ShortDrop flared bar create a comfortable cockpit

Cannondale Wheel Sensor delivers hyper-accurate speed, distance and route info, service reminders, and more via the Cannondale App

Specification

Frame	Topstone Carbon, Kingpin suspension system, SmartSense compatible, Proportional Response construction, 12×142mm thru-axle, 27.2 dropper post ready, BSA 68mm threaded BB, DirectLine internal cable routing, removable fender bridge, multiple gear/bottle mounts
Fork	Topstone Carbon, 1-1/8” to 1.5” steerer, 55mm OutFront offset, flat mount disc, internal routing, 12×100 thru-axle, triple bottle/gear mounts, fender mounts
Rims	WTB KOM Team i25 TCS, 28h, tubeless ready
Front Hub	Shimano TC500, 12×100mm centerlock
Rear Hub	Shimano TC500, 12×142mm centerlock
Spokes	Stainless Steel, 14g
Tyres	WTB Riddler TCS Light, 700×45c, tubeless ready
Pedals	Not included
Crank	Shimano GRX 820, 48/31
Bottom Bracket	Shimano BSA 68
Chain	Shimano M8100, 12-speed
Cassette	Shimano Ultegra R8100, 11-34, 12-speed
Front Derailleur	Shimano GRX 820
Rear Derailleur	Shimano GRX 820, Shadow RD+
Shifters	Shimano GRX 820, 12-speed
Handlebar	Cannondale 2 ShortDrop, 7050 alloy, 12 deg flare drop
Bar Tape	Cannondale KnurlCork, 2.7mm
Stem	Cannondale C1 Conceal, Alloy, 31.8, -6°
Headset	Integrated, 1-1/8” – 1-1/2”
Brakes	Shimano GRX 820 hydraulic disc, 160/160mm MT800 rotors
Saddle	Fizik Terra Argo X7
Seatpost	Cannondale 2 Carbon, 27.2×350mm (47-58), 400mm (61)
Connectivity	Cannondale Wheel Sensor
Extras	Tubeless valves, Large StashBag downtube storage bag, tubeless valve stems

Specifications are subject to change without notice

Size Guide

Frame Size	Minimum Height	Maximum Height
47cm	149cm (4’11”)	167cm (5’6”)
51cm	165cm (5’5”)	175cm (5’9”)
54cm	172cm (5’8”)	180cm (5’11”)
56cm	177cm (5’10”)	185cm (6’4”)
58cm	182cm (6’0”)	193cm (6’4”)
61cm	190cm (6’3”)	200cm (6’7”)

We have developed our size guide from our selling experience and it may differ from the manufacturers guide. Please note, this is only a guide and if you have any concerns over sizing please get in contact

Geometry

Frame Size	47cm	51cm	54cm	56cm	58cm	61cm
A – Seat Tube Length	41.0cm	44.6cm	48.2cm	51.8cm	55.4cm	59.0cm
B – Top Tube Horizontal	53.2cm	54.3cm	55.4cm	56.4cm	57.6cm	59.3cm
C – Top Tube Actual	51.0cm	52.0cm	53.1cm	54.3cm	55.7cm	57.4cm
D – Head Tube Angle	69.9°	70.7°	70.7°	70.7°	70.7°	70.7°
E – Seat Tube Angle	73.1°	73.1°	73.1°	73.1°	73.1°	73.1°
F – Standover	71.6cm	74.1cm	77.2cm	80.0cm	83.1cm	86.4cm
G – Head Tube Length	9.7cm	10.1cm	12.3cm	14.2cm	16.4cm	19.6cm
H – Wheelbase	100.9cm	101.2cm	102.6cm	103.6cm	105.0cm	106.9cm
I – Front Center	60.1cm	60.5cm	61.7cm	62.8cm	64.1cm	65.9cm
J – Chain Stay Length	42.0cm	42.0cm	42.0cm	42.0cm	42.0cm	42.0cm
K – Bottom Bracket Drop	7.9cm	7.9cm	7.6cm	7.6cm	7.4cm	7.4cm
L – Bottom Bracket Height	28.0cm	28.0cm	28.3cm	28.3cm	28.5cm	28.5cm
M – Fork Rake	5.5cm	5.5cm	5.5cm	5.5cm	5.5cm	5.5cm
N – Trail	7.3cm	6.7cm	6.7cm	6.7cm	6.7cm	6.7cm
0 – Stack	55.4cm	56.1cm	57.9cm	59.7cm	61.5cm	64.6cm
P – Reach	36.4cm	37.3cm	37.8cm	38.3cm	38.9cm	39.7cm
Q – Axel to Crown	42.9cm	42.9cm	42.9cm	42.9cm	42.9cm	42.9cm

Want to compare the size of your current bike to this one? Read our Reach and Stack guide here.