Velopedia Bicycle Archive
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Compare published geometry, gearing and specifications for up to three bicycles.
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1 of 2 bicycles
At a glance
Key differences
Supported differences are shown below. Data limitations are labeled separately.
- Identity & price
These bicycles are categorized differently: 2009 Jamis Aurora is Touring; 2011 Jamis Aurora is City & Commuter.
- Data limitation
No geometry is recorded for 2009 Jamis Aurora and 2011 Jamis Aurora.
- Gearing
2009 Jamis Aurora has a 13% lower climbing ratio than 2011 Jamis Aurora.
A lower ratio gives more mechanical advantage; rear-wheel rollout determines distance per crank turn.
Gearing comparison
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Lowest0.94:1Highest4.55:1Total range485%
Estimated speed at 90 RPMLowest gearHighest gear
Uses front tire 700C×32; rear size isn’t listed.
Lowest1.07:1Highest4.55:1Total range424%
Estimated speed at 90 RPMLowest gearHighest gear
Uses front tire 700C×32; 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.
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.
Specification
2009 Jamis Aurora
2011 Jamis Aurora
Overview
Model Year
2009
2011
Brand
Jamis
Jamis
Model
Aurora
Aurora
Bicycle Type
Touring
City/commuter
Original MSRP
$1,000.00
$1,050.00
Colors
Bone
Sangria
Sizes
47cm, 50cm, 53cm, 55cm, 57cm, 59cm, 62cm
47, 50, 53, 55, 57, 59, 62cm
Weight
27.4 lb
27.50 lbs
Frameset
Frame Construction
TIG-welded
Steel
Frame Material
Reynolds 520 Butted Chromoly
Reynolds 520 Double Butted Chromoly
Fork
—
Lugged semi-sloping chromoly
Fork Material
Chromoly, unicrown crown
Steel
Drivetrain
Component Group
Shimano Tiagra
Commuter Mix
Shifters
Shimano Tiagra STI
Shimano Tiagra Dual Control STI
Front Derailleur
Shimano Tiagra
Shimano Tiagra FD-4503, clamp on
Rear Derailleur
Shimano Deore
Shimano 105 RD-5700GS
Crankset
FSA Vero, 30/39/50 teeth
FSA Vero Forged, 50/39/30t teeth
Bottom Bracket
FSA Powerdrive, 113mm spindle
FSA Powerdrive, 118.5mm spindle
BB Shell Width
68mm
68mm
Cassette
SRAM PG-950
SRAM PowerGlide 950
Rear Cogs
9-speed, 11 - 32 teeth
9-speed, 11 - 28 teeth
Chain
KMC Z9000
KMC Z99
Pedals
Alloy Cage toe/clip & strap
Touring Platform w/ Toe Clips
Brakes
Brakes
Tektro ORYX cantilever brakes, Shimano Tiagra STI w/Tektro bar top levers levers
Tektro 992 forged alloy brakes, Shimano Tiagra STI levers
Cockpit & Contact Points
Headset
1 1/8" Ritchey LB
1 1/8" Ritchey LB Aheadset
Handlebar
Ritchey BioMax II Road
Ritchey Biomax 2
Handlebar Extensions
Not included
Not included
Stem
NVO adjustable
NVO components
Saddle
Jamis Touring Sport
Jamis Touring Sport
Seatpost
Ritchey Road, 27.2mm diameter
Ritchey Road, 27.2mm diameter
Wheels & Tires
Hubs
Shimano Tiagra
Shimano Tiagra
Rims
Alex ACE-19, 36-hole
Alex ACE-19, 36-hole
Spokes
Stainless, 14ga. (2.0mm)
Stainless Steel stainless, 14ga. (2.0mm)
Front Tire
700 x 32c Vittoria Randonneur
700 x 32c Vittoria Randonneur
Wheel Size
700c wheels
700c wheels
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run.