Velopedia Bicycle Archive

Compare Bicycles

Compare published geometry, gearing and specifications for up to three bicycles.

1 of 2 bicycles

At a glance

Key differences

Supported differences are shown below. Data limitations are labeled separately.

  1. Data limitation

    No geometry is recorded for 2009 BH G4/ Dura-Ace and 2008 BH G4/ Dura-Ace.

  2. Gearing

    2009 BH G4/ Dura-Ace has a 13% lower climbing ratio than 2008 BH G4/ Dura-Ace.

    A lower ratio gives more mechanical advantage; rear-wheel rollout determines distance per crank turn.

  3. Identity & price

    2008 BH G4/ Dura-Ace had an original MSRP $1,000 lower than 2009 BH G4/ Dura-Ace.

    Original MSRP is the published list price when new, not today’s used-bike value.

Gearing comparison

Lower gears help on climbs. Higher gears suit higher speeds.

RPM

RPM = pedal turns per minute.

2009 BH G4/ Dura-Ace50/34T · 11–25T · 10-speed
Lowest1.36:1Highest4.55:1Total range334%
Estimated speed at 90 RPMLowest gear9.6 mphHighest gear32.0 mph

Uses front tire 700C×23; rear size isn’t listed.

2008 BH G4/ Dura-Ace53/39T · 12–25T · 10-speed
Lowest1.56:1Highest4.42:1Total range283%
Estimated speed at 90 RPMLowest gear11.0 mphHighest gear31.1 mph

Uses front tire 700C×23; rear size isn’t listed.

How it works

Ratio = front teeth ÷ rear teeth. Hub gears also include the hub’s internal ratio. A 400% range means the highest ratio is four times the lowest.

Speeds are estimates from tire size and pedal cadence. Actual speeds vary.

Try other gearing

Complete specification tableShows different published values and gaps where a bicycle lacks data. Different wording reflects source language, not necessarily different components. Swipe for more columns.
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Specification
2009 BH G4/ Dura-Ace
2008 BH G4/ Dura-Ace
Overview
Model Year
2009
2008
Brand
BH
BH
Model
G4/ Dura-Ace
G4/ Dura-Ace
Bicycle Type
Road race & triathlon
Road race & triathlon
Original MSRP
$7,150.00
$6,150.00
Colors
Red
White/Carbon
Sizes
52cm, 54cm, 55.5cm, 57cm, 58.5cm
54cm, 55.5cm, 57cm
Weight
—
—
Frameset
Frame Construction
Bonded/monocoque
Monocoque
Frame Material
High Modulus carbon fiber
BH G4 Nano Carbon
Fork
—
BH Carbon HM UL
Fork Material
Carbon fiber/carbon fiber steerer, aero crown
Carbon, aero crown
Drivetrain
Component Group
Shimano Dura-Ace
Shimano Dura-Ace
Shifters
Shimano Dura-Ace STI
Shimano Dura-Ace STI
Front Derailleur
Shimano Dura-Ace
Shimano Dura-Ace
Rear Derailleur
Shimano Dura-Ace
Shimano Dura-Ace
Crankset
Shimano Dura-Ace, 34/50 teeth
Shimano Dura-Ace Hollowtech II, 39/53 teeth
Bottom Bracket
Shimano Hollowtech II
Shimano Hollowtech II
Cassette
Shimano Dura-Ace
Shimano Dura-Ace
Rear Cogs
10-speed, 11 - 25 teeth
10-speed, 12 - 25 teeth
Brakes
Brakes
Shimano Dura-Ace Dual Pivot brakes, Shimano Dura-Ace STI levers
Shimano Dura-Ace brakes, Shimano Dura-Ace levers
Cockpit & Contact Points
Headset
1 1/8" FSA Orbit CE Plus
—
Handlebar
FSA SLK Carbon compact
FSA SLK Carbon
Handlebar Extensions
Not included
Not included
Stem
FSA OS-99
FSA OS-99
Saddle
Selle San Marco Aspide CS Ti
Pro Logo Nago Ti
Seatpost
Integrated
Integrated Carbon Seat Mast
Wheels & Tires
Hubs
Shimano Dura-Ace CL
Shimano Dura-Ace CL
Rims
Shimano Dura-Ace CL
Shimano Dura-Ace CL
Front Tire
700 x 23c Vittoria Diamante Pro Light
700 x 23c Vittoria Diamante Pro Light
Wheel Size
700c wheels
700c wheels

Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.

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