Lowest1.00:1
Highest4.91:1
Total range491%
Estimated speed At 90 RPM
Lowest gear
Highest gear
Uses front tire 700C×28; rear size isn’t listed.
Velopedia Bicycle Archive
1999 Co-Motion Speedster AL
Original specifications: Shimano Deore XT · 9-speed · mechanical rear derailleur · 700c wheels · 33.9 lb published weight.
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No archive photo is available for this record.
At a glance
Archive #81903- Model year
- 1999
- Category
- Tandem
- Original MSRP
- $4,140.00
- Sizes
- Captain 21"/stoker 18", captain 22"/stoker 19", captain 23"/stoker 20"
- Weight
- 33.9 lb
- In this record
- 25 specifications · original MSRP
Original build7005 aluminum, double-butted · Tandem Mix · 700c wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | 7005 aluminum, double-butted |
| Fork | Co-Motion |
| Fork Material | 4130 chromoly, unicrown crown |
Drivetrain
| Component Group | Tandem Mix |
|---|---|
| Shifters | Shimano Ultegra bar-end |
| Front Derailleur | Shimano Ultegra, bottom-pull |
| Rear Derailleur | Shimano Deore XT SGS |
| Crankset | Ritchey Tandem, 32/44/54 teeth |
| Bottom Bracket | Shimano BB-UN51, 122.5mm spindle |
| BB Shell Width | 68mm English |
| Rear Cogs | 9-speed, 11 - 32 teeth |
| Chain | Shimano CN-HG92, 1/2 x 3/32" |
| Pedals | Not included |
Brakes
| Brakes | Avid 1D-25 brakes, Dia-Compe 287 levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless Race Face Thermo SP |
|---|---|
| Handlebar | Profile Hammer |
| Stem | Salsa Moto Ace |
| Seatpost | Zoom Microset, 29.8mm diameter |
Wheels & Tires
| Hubs | Phil Wood tandem |
|---|---|
| Rims | Mavic T 217 SUP |
| Spokes | DT stainless steel, 2.0mm straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 700 x 28c Avocet Fast Grip |
| Wheel Size | 700c wheels |
No specifications match. Try a component name or clear your search.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
RPM
RPM = pedal turns per minute.
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 your current gearingChanged tires or gears? Calculate your setup.
Your changes apply to this calculation. The archived build stays unchanged.
Gearing results
| Measure | Original | Your setup |
|---|---|---|
| Lowest ratio | — | — |
| Highest ratio | — | — |
| Total range | — | — |
| Lowest-gear speed | — | — |
| Highest-gear speed | — | — |
Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.
Parts & serviceability
Find replacement parts
700 x 28c Avocet Fast Grip
Replacement search: 700cx28 bicycle tire Before ordering: Check rim type and tire clearance.
Shimano BB-UN51
122.5mm spindle
More parts (8)Fewer parts
Ritchey Tandem
32/44/54 teeth
Shimano Ultegra
bottom-pull
Shimano Deore XT SGS
Shimano Ultegra bar-end
Salsa Moto Ace
Zoom Microset
29.8mm diameter
1 1/8" threadless Race Face Thermo SP
Mavic T 217 SUP
Based on the original build. Check fit and installed parts before ordering. Affiliate links may earn Velopedia a commission. As an Amazon Associate I earn from qualifying purchases.
Parts and service referenceQuick reference before buying parts
Archived specifications for reference. Check the fitted parts before ordering.
- Front tire
- 700 x 28c Avocet Fast Grip
- Drivetrain
- 9-speed
- Seatpost diameter
- 29.8 mm
- Bottom bracket / shell
- Shimano BB-UN51, 122.5mm spindle · 68mm English
Equipment inspection checks 10 checks based on 5 archived component groups Open equipment checksClose equipment checks
Checks selected from the archived equipment. Confirm what is fitted today. This is not a complete safety inspection; use the full inspection guide before test riding.
Full used-bike inspection guide →
Frame and fork
Inspect the frame and fork →Archived: Frame: TIG-welded · Fork: Co-Motion · 4130 chromoly, unicrown crown
Drivetrain
Check drivetrain wear →Archived: Group: Tandem Mix · Shifters: Shimano Ultegra bar-end · Front derailleur: Shimano Ultegra, bottom-pull · Rear derailleur: Shimano Deore XT SGS · Crankset: Ritchey Tandem, 32/44/54 teeth · Bottom bracket: Shimano BB-UN51, 122.5mm spindle · Rear cogs: 9-speed, 11 - 32 teeth · Chain: Shimano CN-HG92, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Avid 1D-25 brakes, Dia-Compe 287 levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 700c wheels · Rims: Mavic T 217 SUP · Hubs: Phil Wood tandem · Front tire: 700 x 28c Avocet Fast Grip
Controls and contact points
Archived: Headset: 1 1/8" threadless Race Face Thermo SP · Handlebar: Profile Hammer · Stem: Salsa Moto Ace · Seatpost: Zoom Microset, 29.8mm diameter · Pedals: Not included
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.