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. Gearing

    1994 Jamis Aurora has a 15% lower climbing ratio than 1993 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.

1993 Jamis AuroraSize Legacy reference · 46/36/26T · 12–28T · 7-speed
Lowest0.93:1Highest3.83:1Total range413%
Estimated speed at 90 RPMLowest gear6.5 mphHighest gear26.9 mph

Uses front tire 26×2.1; rear size isn’t listed.

1994 Jamis AuroraSize Legacy reference · 42/32/22T · 11–28T · 7-speed
Lowest0.79:1Highest3.82:1Total range486%
Estimated speed at 90 RPMLowest gear5.5 mphHighest gear26.8 mph

Uses front tire 26×2.1; 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
1993 Jamis Aurora
1994 Jamis Aurora
Overview
Model Year
1993
1994
Brand
Jamis
Jamis
Model
Aurora
Aurora
Bicycle Type
Mountain bike, front suspension
Mountain bike, front suspension
Original MSRP
$960.00
$945.00
Colors
—
—
Sizes
16, 17.5, 19.5, 21.5
14.5", 16", 17.5", 19.5", 21.5"
Weight
25.8 lb
25.5 lb
Frameset
Frame Construction
TIG-welded steel
TIG-welded steel
Frame Material
Tange MTB DB chrome-moly
Tange chromoly, double-butted
Fork
Rock Shox Mag 10
Rock Shox Mag 10
Drivetrain
Component Group
Shimano Deore LX Rapidfire Plus
Shimano Deore LX
Shifters
Shimano Deore LX Rapidfire Plus
Shimano STX Rapidfire Plus w/Optical Gear Display
Front Derailleur
Shimano Deore LX
Shimano Deore LX
Rear Derailleur
Shimano Deore LX
Shimano Deore LX
Crankset
Shimano Deore LX, 26/36/46 teeth
Shimano Deore LX, 22/32/42 teeth
Rear Cogs
7-speed, 12 - 28 teeth
7-speed, 11 - 28 teeth
Chain
Shimano CN-HG70
Shimano HG-70
Pedals
Spectre UL Comp w/Clips & Straps
Spectre UL Comp w/clips & straps
Brakes
Brakes
Shimano Deore LX brakes, levers
Shimano STX brakes, levers
Cockpit & Contact Points
Handlebar
Spectre Wonderbar 6061 T-6
Spectre Wonderbar, 6061 T-6, 6bend, 560mm
Stem
Spectre UL Comp, Aheadset type
Spectre UL Comp Direct Mount
Saddle
Spectre UL Comp/250
Spectre UL/260
Seatpost
Spectre UL Comp, 330mm
Spectre UL Comp, 2014 aluminum, 300mm
Wheels & Tires
Hubs
Shimano Deore LX
Shimano STX, 10mm front axle
Rims
Araya RM-400 Pro, 32-hole
Front: Bontrager BCX-1, Rear: Bontrager BCX-2, 32-hole
Front Tire
26 x 2.10" Ritchey Z-Max Kevlar
26 x 2.10" Ritchey Z-Max Kevlar
Wheel Size
26" wheels
26" wheels
Geometry · choose a size for each bicycle
Geometry size
Head-tube angle
71°
71°
Seat-tube angle
71°
74°
Chainstay / rear center
425.4 mm
425.4 mm
Wheelbase
1047.8 mm
1054.1 mm
Fork offset / rake
38.1 mm
38.1 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.

Campaign
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