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.
- Data limitation
No geometry is recorded for 1997 Co-Motion Speedster.
- Gearing
1999 Co-Motion Speedster has a 12% lower climbing ratio than 1997 Co-Motion Speedster.
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.
Lowest1.14:1Highest4.91:1Total range430%
Estimated speed at 90 RPMLowest gearHighest gear
Uses front tire 700C×28; rear size isn’t listed.
Lowest1.00:1Highest4.91:1Total range491%
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
1997 Co-Motion Speedster
1999 Co-Motion Speedster
Overview
Model Year
1997
1999
Brand
Co-Motion
Co-Motion
Model
Speedster
Speedster
Bicycle Type
Tandem (road)
Tandem (road)
Original MSRP
$2,895.00
$2,995.00
Colors
Blue, Bronze, Chrome Yellow, Cream, Custom Fade, Green Metallic, Red
—
Sizes
Captain 21"/stoker 18", captain 22"/stoker 19", captain 23"/stoker 20"
Captain 21"/stoker 18", captain 22"/stoker 19", captain 23"/stoker 20"
Weight
38 lb
35.85 lb
Frameset
Frame Construction
TIG-welded
TIG-welded
Frame Material
Co-Motion Reynolds 531
Reynolds 525 w/Reynolds 725
Fork
Co-Motion
Co-Motion
Fork Material
Reynolds 531, unicrown crown
4130 chromoly, unicrown crown
Drivetrain
Component Group
Co-Motion Tandem Group
Tandem Mix
Shifters
Shimano 600 Ultegra bar-end
Shimano bar-end
Front Derailleur
Sachs New Success, bottom-pull/clamp-on 31.8 mm
Shimano Ultegra, bottom-pull/clamp-on 31.8mm
Rear Derailleur
Sachs New Success
Shimano Deore XT SGS
Crankset
Ritchey Tandem, 32/44/54 teeth
Ritchey Tandem, 32/44/54 teeth
Bottom Bracket
Shimano BB-UN51, 122.5 mm spindle
Shimano BB-UN52
BB Shell Width
68mm English
68mm English
Rear Cogs
8-speed, 11 - 28 teeth
9-speed, 11 - 32 teeth
Chain
Sachs SC-M55, 1/2 x 3/32"
Shimano CN-HG92, 1/2 x 3/32"
Pedals
Not included
Not included
Brakes
Brakes
Shimano Deore LX V-Brake brakes, Dia-Compe 287 levers
Avid 1D-25 brakes, Dia-Compe 287 levers
Cockpit & Contact Points
Headset
1 1/8" YST aluminum
1 1/8" threadless Race Face Thermo SP
Handlebar
Profile Hammer
Profile Hammer
Stem
Co-Motion chromoly
Salsa Moto Ace
Saddle
Terry men's/Terry women's
—
Seatpost
Kalloy Uno, 29.8 mm diameter
Zoom Microset, 29.8mm diameter
Wheels & Tires
Hubs
Phil Wood tandem
Phil Wood tandem
Rims
Mavic T 217 SUP, 40-hole
Mavic T 217 SUP
Spokes
DT stainless steel, 2.0mm straight gauge
DT stainless steel, 2.0mm straight gauge
Spoke Nipples
Brass nipples
Brass nipples
Front Tire
700 x 28c Continental Super Sport
700 x 28c Avocet Fast Grip
Wheel Size
700c wheels
700c wheels
Geometry · choose a size for each bicycle
Geometry size
—
Head-tube angle
—
73°
Seat-tube angle
—
73°
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.