Topstone Carbon 1 Lefty

Nothing is impassable
The best dual-suspension gravel bike for rugged dirt roads and singletrack trails. With the Kingpin system and Lefty fork, nothing is off-limits.
Where it thrives
Gravel and Dirt Roads, Rough Pavement, Trails
What it's built for
Gravel riding, back road exploring, bike packing and off-road adventures
Highlights
Lightweight Topstone Carbon frame with Kingpin suspension / Lefty Oliver Carbon gravel suspension fork, 30mm travel
SRAM Force eTap electronic 12-speed group / SAVE Carbon seatpost
HollowGram G-S 27 Carbon wheels
Platform
Topstone Carbon
Model Name
Topstone Carbon 1 Lefty
Model Code
C15102U
Frameset
Frame
Topstone Carbon, Kingpin suspension system, SmartSense compatible, Proportional Response construction, 12x142mm thru-axle, 27.2 dropper post ready, BSA 68mm threaded BB, DirectLine internal cable routing, removable fender bridge, multiple gear/bottle mounts
Fork
Lefty Oliver Carbon, 30mm travel, lockout, Chamber Damper w/ All-Over tune, ISO High-Ride air spring, tapered steerer, 700c, 55mm offset
Headset
Integrated, Carbon, 1-1/8" - 1-1/2"
Drivetrain
Rear Derailleur
SRAM Force eTap AXS XPLR
Shifters
SRAM Force eTap AXS, 12-speed
Chain
SRAM Force, 12-speed
Crank
SRAM Force Direct Mount, 40T
Rear Cogs
SRAM XG-1271 XPLR, 10-44, 12-speed
Bottom Bracket
SRAM DUB BSA Road 68 Wide
Brakes
Brakes
SRAM Force eTap AXS hydraulic disc, 160/160mm CenterLine rotors
Brake Levers
SRAM Force eTap AXS
Wheels
Rims
HollowGram G-S 27 Carbon, 700c, 27mm internal width, 21mm deep, 28h, hookless, tubeless compatible
Spokes
Formula Grand Forza, double butted
Tire Size
44
Wheel Size
700c
Hubs
(F) HollowGram, Lefty, centerlock / (R) HollowGram 12x142mm w/ DT Swiss 350 internals, centerlock
Tires
WTB Raddler TCS Light, 700x44c, tubeless ready (Europe/UK - Vittoria Mezcal III 700x44c ANT tubeless compatible)
Front Tire
WTB Raddler TCS Light, 700x44c, tubeless ready (Europe/UK - Vittoria Mezcal III 700x44c ANT tubeless compatible)
Rear Tire
WTB Raddler TCS Light, 700x44c, tubeless ready (Europe/UK - Vittoria Mezcal III 700x44c ANT tubeless compatible)
Components
Handlebar
Cannondale 2 ShortDrop, 7050 alloy, 12 deg flare drop
Stem
Cannondale 1, 7050 Alloy, -7°
Grips
Fizik Solocush Soft, 3mm
Saddle
Fizik Terra Argo X3, kium rails
Seatpost
SAVE Carbon, 27.2x350mm (XS-L), 400mm (XL)
Connectivity
Wheel Sensor
Cannondale Wheel Sensor
Extra
Extra 1
StrapRack tool/stuff holder