The new Cannondale Topstone 650B goes full-squish with the all-new Lefty Oliver Carbon fork and 30mm “Kingpin” rear suspension…

There’s a whole lot going on with the new Cannondale Topstone Carbon 650B. First, the all-new Lefty Oliver Carbon fork provides 30mm of suspension up front. And like it’s predecessor, the Topstone’s BallisTec Carbon Frame has 30mm of rear suspension via a “Kingpin” thru-axle pivot in the seat tube. This allows the entire back of the frame—the rear stays, seat tube, even the rear of the top tube—to flex like a series of connected leaf-springs, absorbing bumps and road vibration. Additional features include a 12×142 Speed Release thru-axle, dropper post compatibility, and direct line cable routing. Here are the specs from Cannondale with the full build kit on the high-end Lefty 1 model below.

Cannondale Topstone Carbon Lefty

The new Lefty gets a dampered High-Ride air spring, tapered steerer, 55mm offset, and clearance for

Kingpin Suspension

The Kingpin suspension system offers up to 30mm of bump-smoothing suspension, without the weight and complexity of a shock or linkages.

LockR Pivot

Thru-axle pivot locks the left and right seat-stays together, preventing independent rotation for a solid feel and instantaneous response.

Proportional Response Construction

Suspension and overall frame ride-feel is custom tuned by size, using different carbon layup and different tube dimensions, so each size is dialed for the rider. Just get on and go.

Dialed Endurance Fit

Offers a perfectly balanced riding position: upright enough for comfort over the long haul and control when tackling technical off-road terrain, yet still low and forward enough for speedy efficiency.

OutFront Steering Geometry

Keeps the steering light and agile, while positioning the wheel further in front of the rider for stability and confidence on rougher stuff. Plus it reduces the chance of toe overlap on smaller sizes.


An integrated wheel sensor delivers hyper accurate speed, route and distance info, registers your bike, reminds you of needed service and more, all through the free Cannondale App.

Gear Mounts

Plenty of places to store gear and water, with a multi-position mount on the downtube, and more on the top tube, seat tube, and under the down tube.

Fender Ready

Full fender ready. A removable fender bridge on the rear stays is there when you need it, gone when you don’t.

Speed Release Equipped

Speed Release thru-axles offer the stiffness and solid feel of a thru-axle, with the easy use of a quick release axle. Compatible with most thru-axle wheelsets.

Easy Internal Cable Routing

With our DirectLine cable routing, an internal tube guides the cable and housing through the frame, from entry to exit for headache-free service.

Dropper Ready

Built to accept an internally-routed 27.2 dropper seatpost, which shouldn’t really be a surprise on a bike that's this off-road capable.

Cannondale Topstone Carbon Lefty

Lefty Oliver Gen2 Fork

The all-New Lefty Oliver Carbon fork features 30mm travel in either alloy or carbon versions with the same rake and axle-to-crown height as standard Topstone fork. Here are a few other features:

– Chamber Damper with All-Over tune
– ISO High-Ride air spring
– Standard tapered steerer
– Available for 650B x 47 or 700 x 45mm
– 55mm offset
– Lockout switch
– Lefty 50 hub
– Tool-free disc brake mount
– $1,500 MSRP (carbon)
  • Cannondale Topstone Carbon Lefty
  • Cannondale Topstone Carbon Lefty
  • Cannondale Topstone Carbon Lefty
  • Cannondale Topstone Carbon Lefty
  • Cannondale Topstone Carbon Lefty

The new Cannondale Topstone Carbon comes in two variations with the new Lefty Oliver fork: Lefty 3, which comes in a Mantis color with a GRX drivetrain, and the Lefty 1. The Lefty 1 as shown here gets an AXS 1x mullet drivetrain, a HollowGram SAVE bar-stem, and a 90s two-tone “chameleon” paint job that’s purple and blue, depending on the light. Here’s the full build kit.

  • Brake Levers SRAM Force AXS
  • Brakes SRAM Force eTap AXS, 160/160mm Centerlock rotors
  • Grips Cannondale Bar Tape, 3.5mm
  • Handlebar HollowGram SAVE SystemBar, Carbon, 8 deg. pitch adjust
  • Saddle Fabric Scoop Shallow Race, titanium rails
  • Seatpost HollowGram SAVE Carbon, 27.2 x 350mm
  • Stem HollowGram SAVE, Alloy, -6°
  • Bottom Bracket SRAM BB DUB BB30 ROAD83-A
  • Chain SRAM X01 Eagle, 12-speed
  • Crank SRAM Force AXS 1x Crankset, DUB Spindle, 40T
  • Rear Cogs SRAM PG-1295, X01 Eagle, 10-50, 12-speed
  • Rear Derailleur SRAM X01 Eagle eTap AXS
  • Shifters SRAM Force eTap AXS HRD, 12-speed
  • Front Tire WTB Venture TCS Light, 650 x 47c, tubeless ready
  • Rear Hub Formula DHT-141
  • Rear Tire WTB Byway TCS Light, 650 x 47c, tubeless ready
  • Rims HollowGram 23, Superlight Hi-Impact Carbon, 28h, 23mm IW, tubeless ready
  • Spokes HollowGram 2.0/1.8/2.0
  • Cannondale Topstone Carbon Lefty
  • Cannondale Topstone Carbon Lefty
  • Cannondale Topstone Carbon Lefty
  • Cannondale Topstone Carbon Lefty
  • Cannondale Topstone Carbon Lefty

The Lefty 1 complete is available for $7500 and the Lefty 3 (above right) can be purchased for $3750. You can also buy the new Lefty Oliver fork for $1500. Find more on the new Cannondale Topstone and Lefty Oliver fork over at



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