Compare Bikes

The Cannondale Topstone 105 and Ridley Helium SLA Disc Ultegra are both aluminum frame road bikes. The Ridley has better components and higher gearing. Explore the differences below.

2020 Cannondale Topstone 105
2018 Ridley Helium SLA Disc Ultegra
MSRP$1,750
Online Price
$1

At

$1

At

CategoryGravelRace
Weight21.8 lbs
FrameAluminumAluminum
ForkCarbonCarbon
Wheel Size700c700c
Wheel MaterialAluminumAluminum
Brake TypeHydraulic DiscMechanical Disc
Groupset105, FSA
Ultegra
Drivetrain2 × 112 × 11
Gear Range

Cannondale Topstone 105

36 mph

Ridley Helium SLA Disc Ultegra

41 mph
SeatpostRigidRigid
Brand Sitecannondale.comridley-bikes.com
Suggested Bikes

Spec Level

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

Spec level →$0$200$400$600$800$1,000$1,200$1,400$1,600
Topstone 105
Helium SLA Disc Ultegra

Geometry

Specs
Frame

SmartForm C2 Alloy, 142x12 thru-axle, tapered headtube, flat mount disc, StraightShot internal cable routing, multiple gear/bottle mounts, 142x12 thru-axle, Tapered headtube, Flat mount disc, StraightShot internal cable routing, Multiple gear/bottle mounts

Helium SLA Disc, 6061 and 6066 Aluminium, 12mm TA, flatmount

Fork

Full Carbon, 1-1/8" to 1-1/4" steerer, 55mm OutFront offset, flat mount disc, internal routing, 12x100 thru axle

Helium SLA Disc, 30T-24T HM UD Carbon, 12mm TA, Flatmount

Rear Shock

none

Bottom Bracket

FSA Omega

Headset

Topstone Si, 25mm Alloy top cap

Stem

Cannondale 3, 6061 alloy, 31.8, 7°

Forza Stratos

Handlebar

Cannondale 3, butted 6061 alloy, 16 deg flare drop

Forza Stratos

Saddle

Fabric Scoop Radius Sport, steel rails

Forza Cirrus Pro

Seatpost

Cannondale 3, 6061 Alloy, 27.2 x 350mm

Forza Cirrus

Pedals

Not Included

Grips

Cannondale Grip Bar Tape w/Gel, 3.5mm

Groupset
Rear Derailleur

Shimano 105 GS

Shimano Ultegra

Front Derailleur

Shimano 105, 31.8 clamp

Shimano Ultegra

Crank

FSA Omega ME alloy, 46/30

Rotor 3D30 52/36

Shifters

Shimano 105 hydro disc, 2x11

Shimano Ultegra

Cassette

Shimano 105, 11-34, 11-speed

Shimano 105 11/28

Chain

KMC X11, 11-speed

KMC x11

Brakes

Shimano 105 hydro disc, 160/160mm RT56 rotors

Shimano Ultegra Disc

Brake Levers

Shimano 105 hydro disc

Wheels
Rims

WTB ST i23 TCS, 28h, tubeless ready

Fulcrum Racing Sport DB

Spokes

Stainless Steel, 14g

Front Hub

Formula RX-512, 12x100 centerlock

Rear Hub

Formula RX-142, 12x142 centerlock

Tires

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

Vittoria Zaffiro Pro