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: 2006 Jamis Aurora is Touring; 2004 Jamis Aurora is Road.
- Data limitation
No geometry is recorded for 2006 Jamis Aurora.
Gearing comparison
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
Lowest0.94:1Highest4.73:1Total range504%
Estimated speed at 90 RPMLowest gearHighest gear
Uses front tire 700C×28; rear size isn’t listed.
Lowest0.94:1Highest4.33:1Total range462%
Estimated speed at 90 RPMLowest gearHighest gear
Uses front tire 700C×28; 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
2006 Jamis Aurora
2004 Jamis Aurora
Overview
Model Year
2006
2004
Brand
Jamis
Jamis
Model
Aurora
Aurora
Bicycle Type
Touring
Road/sport
Original MSRP
$825.00
$729.95
Colors
Copper/Ivory
Flame Red/Platinum
Sizes
47cm, 50cm, 53cm, 55cm, 57cm, 59cm, 62cm
47cm, 50cm, 53cm, 55cm, 57cm, 59cm, 62cm
Weight
26.25 lb
21.75 lb
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
Reynolds 520
Reynolds 520
Fork
Jamis
Jamis
Fork Material
Chromoly, unicrown crown
Chromoly, unicrown crown
Drivetrain
Component Group
Touring Mix
Road Mix Triple
Shifters
Shimano Tiagra STI Dual Control
Shimano Tiagra STI Dual Control
Front Derailleur
Shimano Tiagra Triple, top-pull/clamp-on 31.8mm
Shimano Sora Triple, bottom-pull/clamp-on 28.6mm
Rear Derailleur
Shimano Deore
Shimano Deore SGS
Crankset
Truvativ Isoflow, 30/42/52 teeth
TruVativ Touro, 30/42/52 teeth
Bottom Bracket
Truvativ Power Spline
Tien Hsin BB-7418, 113mm spindle
BB Shell Width
—
68mm English
Rear Cogs
9-speed, 11 - 32 teeth
9-speed, 12 - 32 teeth
Chain
KMC Z9000
Shimano CN-HG50, 1/2 x 3/32"
Pedals
Aluminum cage w/clips & straps
Wellgo
Brakes
Brakes
Tektro cantilever brakes, Shimano Tiagra STI Dual Control levers
Tektro cantilever brakes, Shimano Tiagra STI Dual Control levers
Cockpit & Contact Points
Headset
1 1/8" threadless Aheadset
1" threaded VP sealed
Handlebar
Ritchey Biomax II Road
Ritchey Biomax II
Handlebar Extensions
—
Not included
Stem
Ritchey Pro adjustable
Aluminum
Saddle
Jamis Touring
Selle Royale Look-In
Seatpost
Ritchey Road, 27.2mm diameter
Ritchey Comp, 27.2mm diameter
Wheels & Tires
Hubs
Shimano Sora
Ritchey Comp
Rims
Alex ACE-19, 36-hole
Alex AT-450, 36-hole
Spokes
Stainless steel, 14ga. (2.0mm) straight gauge
Stainless steel, 14ga. (2.0mm) straight gauge
Spoke Nipples
—
Brass nipples
Front Tire
700 x 28c Hutchinson Flash
700 x 28c Hutchinson Flash
Wheel Size
700c wheels
700c wheels
Geometry · choose a size for each bicycle
Geometry size
—
Head-tube angle
—
72°
Seat-tube angle
—
73°
Chainstay / rear center
—
440 mm
Wheelbase
—
1027 mm
Fork offset / rake
—
50 mm
Historical specifications are presented as an archival reference. Components may have varied by market, size, or production run. Legacy reference geometry is model-level historical data whose corresponding frame size is not identified; compare those dimensions as reference values rather than size-normalized fit data.