2021 Cannondale

Topstone Carbon Ultegra RX

A carbon frame gravel bike with high-end components and hydraulic disc brakes.

MSRP$4,200
Weight18.5 lbs  
FrameCarbon
SuspensionRigid
ForkCarbon
Wheels700c Carbon
Drivetrain2 × 11
GroupsetUltegra
BrakesHydraulic Disc
Where to Buy
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Insights
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

36 mph

Topstone Carbon Ultegra RX

36 mph

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Highest gear

(descending)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

Sizing
XS

5'1" – 5'6"

SM

5'4" – 5'9"

MD

5'7" – 6'0"

LG

5'10" – 6'3"

XL

6'0" – 6'5"

🐐 Estimated

Rider Fit Notes

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Reviews
99 Spokes
2020 Cannondale Topstone 105

Jun 2020

Cannondale's attention to detail on the Topstone is excellent, and they've made some really interesting design choices to stand out in an increasingly-crowded category. Apparently they've succeeded -- the Topstone 105 has been the third most popular bike on all of 99 Spokes this year.

Highs
  • Well balanced

  • Descends well

  • Good power transfer

Lows
  • No mount points on the fork

  • Cheap bottom bracket

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Velo
Cannondale’s new Topstone Carbon is perfect for your summer plans — even if they change

Jun 2022 · Betsy Welch

I tested the Topstone with a Lefty Oliver fork while road riding, gravel cycling, and underbiking around Aspen, Colorado.

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Road Bike Action
2021 CANNONDALE TOPSTONE CARBON LEFTY 3 GRAVEL BIKE REVIEW - Road Bike Action

Aug 2021 · David Kennedy

Overall, the Cannondale Topstone Carbon Lefty 3 is a fun bike. Yes, a tad on the heavy side, but with some slight changes could be made lighter. Topstone Carbon Lefty 3...

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road.cc
Cannondale Topstone Carbon Lefty 1

Dec 2020 · Dave Atkinson

Fast, light gravel ripper with top-notch equipment and useful suspension tech

Highs
  • Suspension a genuine benefit off road

  • Fast and fun ride

  • Dropper and mudguard compatible

Lows
  • Fiddly front wheel removal

  • Tyres not up to technical stuff

  • Costs large amounts of money

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Bikerumor
Cannondale Topstone Carbon Lefty (finally) adds next-gen Oliver v2 front suspension

May 2020

The Cannondale Topstone Carbon Lefty gives them an efficient "full suspension" gravel bike, complete with all-new, 2nd gen Lefty Oliver suspension fork!

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Cycling Tips
Cannondale Topstone Carbon Lefty review: Suspension makes it better - CyclingTips

May 2020 · James Huang

The new Cannondale Topstone Carbon Lefty is basically the same as the standard Topstone Carbon, but now with a suspension fork and a switch to 650b wheels and tires. The changes sound modest on paper but the difference you feel in the saddle is far greater than you might expect, and while that Lefty Oliver […]

Highs
  • Exceptional ride quality front and rear, well-tuned front suspension fork, nimble handling.

Lows
  • Lots of Cannondale quirkiness, heavy.

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Cycling News
Cannondale Topstone Ultegra RX 2 review

May 2020 · Patrick Fletcher

Rather than singling out one area of expertise, the Cannondale Topstone has the ability to adapt to any situation - trails, gravel and pavement dashing included

Highs
  • Ride quality

  • Ultegra groupset

  • Overall speed and all-round terrain ability

Lows
  • Wheels could be of better stock

  • Not tubeless from factory

Read Review

Cyclist
Cannondale Topstone Ultegra bike review

May 2020 · Paul Norman

A fun off-road machine that ticks all the gravel riding boxes, but the low ratios slow progress on tarmac

Highs
  • Quality off road spec and handling

  • Good tyres

Lows
  • A bit weighty

  • Exposed cabling under BB

Read Review

Geometry
99 Spokes on YouTube99 Spokes on YouTube
Specs
Build
Frame

All-New, BallisTec Carbon, Kingpin suspension system, Proportional Response size-specific construction, Directline internal cable routing, BB30-83 Ai, 142x12 Speed Release thru-axle, flat-mount disc, removable fender bridge, multiple gear/bottle mounts, dropper post compatible, 142x12 thru-axle, Tapered headtube, Flat mount disc, StraightShot internal cable routing, Multiple gear/bottle mounts

BB StandardBB30, Press Fit

Fork

All-New, BallisTec Carbon, 55mm OutFront offset, SAVE, 1-1/8" to 1.5" steerer, integrated crown race, Directline internal routing, 12x100mm Speed Release thru-axle, flat mount disc, gear/rack/fender mounts

Bottom Bracket

Cannondale Alloy BB30

Headset

Integrated, 1.5" lower to 1-1/8" upper w/ reducer, 25mm Alloy top cap

Stem

Cannondale 2, 6061 alloy, 31.8, 6°

Handlebar

Cannondale 3, butted 6061 alloy, 16 deg flare drop

Saddle

Fabric Scoop Radius Sport, steel rails

Seatpost

SAVE Carbon, 27.2 x 350mm (44-56), 400mm (58-63)

TypeRigid

Grips

Cannondale Grip Bar Tape w/Gel, 3.5mm

Groupset
Rear Derailleur

Shimano Ultegra RX

Front Derailleur

Shimano Ultegra, braze-on

Crank

HollowGram, BB30a w/ OPI SpideRing, 46/30

Shifters

Shimano Ultegra hydro disc, 2x11

Cassette

Shimano Ultegra, 11-34, 11-speed

Chain

Shimano HG601 11-speed

Brakes

Shimano Ultegra hydro disc, 160/160mm RT54 rotors

TypeHydraulic Disc

Brake Levers

Shimano Ultegra hydro disc

Wheels
Rims

HollowGram 22, 22mm deep, 25mm ID, tubeless ready

Spokes

Stainless steel, 14g

Front Hub

HollowGram Sealed Bearing, straight pull, 12x100

Rear Hub

HollowGram 142x12

Tires

WTB Riddler TCS Light, 700 x 37c, tubeless ready

Rider Notes
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Last updated October 31
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