Uses front tire 26×1.95; rear size isn’t listed.
Velopedia Bicycle Archive
2003 Jamis Cross Country 1.0
Original specifications: Shimano Acera · 7-speed · mechanical rear derailleur · 26" wheels · 29.5 lb published weight.
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At a glance
Archive #30357- Model year
- 2003
- Category
- Mountain
- Original MSRP
- $269.95
- Sizes
- 12", 14", 17", 19", 21", womens 14.5", womens 17.5"
- Colors
- Gloss White/Midnight Blue, Platinum/Gloss Black
- Weight
- 29.5 lb
- Geometry
- Legacy reference
- In this record
- 27 specifications · archived image · original MSRP · geometry
Model history 4 other years
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Identification clues
2003 archived details
- Published colors
- Gloss White/Midnight Blue, Platinum/Gloss Black
- Frame
- 6061 T6 aluminum
- Original equipment
- Mountain Mix
Clues, not proof of model year. Colors vary and components may have been replaced.
Original build6061 T6 aluminum · Mountain Mix · 26" wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | 6061 T6 aluminum |
| Fork | In-Sync Grind 323, 70mm travel |
| Fork Material | Aluminum/magnesium, single crown |
Drivetrain
| Component Group | Mountain Mix |
|---|---|
| Shifters | Shimano Acera EF35 |
| Front Derailleur | SRAM 3.0, top-pull/clamp-on 31.8mm |
| Rear Derailleur | Shimano Acera |
| Crankset | Cyclone aluminum, 22/32/42 teeth |
| Bottom Bracket | Loose ball, 122.5mm spindle |
| BB Shell Width | 68mm English |
| Rear Cogs | 7-speed, 13 - 34 teeth |
| Chain | KMC UG-50, 1/2 x 3/32" |
| Pedals | Wellgo resin |
Brakes
| Brakes | Tektro forged linear-pull brakes, Shimano Acera levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless Tange TG-4 |
|---|---|
| Handlebar | Aluminum, 1" rise |
| Handlebar Extensions | Not included |
| Stem | Jamis aluminum |
| Saddle | Jamis ATB |
| Seatpost | Aluminum, suspension, 27.2mm diameter |
Wheels & Tires
| Hubs | Formula aluminum, Q/R |
|---|---|
| Rims | Weinmann CN-520, 32-hole |
| Spokes | Stainless steel, 14ga. (2.0mm) straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 26 x 1.95" Cheng Shin |
| Wheel Size | 26" wheels |
No specifications match. Try a component name or clear your search.
Geometry
Historical measurements. Frame size unknown.
Reference drawing
Select an available measurement to locate it on the frame.
All geometry measurementsLegacy reference · 6 measurements
| Measurement | Legacy reference |
|---|---|
| Top tube | 575 mm |
| Head-tube angle | 71° |
| Seat-tube angle | 73.5° |
| Chainstay / rear center | 425 mm |
| Wheelbase | 1059 mm |
| Fork offset / rake | 38.1 mm |
Frame size not recorded.
Gearing
Lower gears help on climbs. Higher gears suit higher speeds.
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
suspension, 27.2mm diameter

Cane Creek Thudbuster ST Seatpost Black, 27.2mm
Replacement option
Shimano Acera levers
More parts (2)Fewer parts
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
- 26 x 1.95" Cheng Shin
- Drivetrain
- 7-speed
- Seatpost diameter
- 27.2 mm
- Bottom bracket / shell
- Loose ball, 122.5mm spindle · 68mm English
Equipment inspection checks 11 checks based on 6 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: In-Sync Grind 323, 70mm travel · Aluminum/magnesium, single crown
Suspension
Evaluate the suspension →Archived: Fork: In-Sync Grind 323, 70mm travel
Drivetrain
Check drivetrain wear →Archived: Group: Mountain Mix · Shifters: Shimano Acera EF35 · Front derailleur: SRAM 3.0, top-pull/clamp-on 31.8mm · Rear derailleur: Shimano Acera · Crankset: Cyclone aluminum, 22/32/42 teeth · Bottom bracket: Loose ball, 122.5mm spindle · Rear cogs: 7-speed, 13 - 34 teeth · Chain: KMC UG-50, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Tektro forged linear-pull brakes, Shimano Acera levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 26" wheels · Rims: Weinmann CN-520, 32-hole · Hubs: Formula aluminum, Q/R · Front tire: 26 x 1.95" Cheng Shin
Controls and contact points
Archived: Headset: 1 1/8" threadless Tange TG-4 · Handlebar: Aluminum, 1" rise · Stem: Jamis aluminum · Seatpost: Aluminum, suspension, 27.2mm diameter · Saddle: Jamis ATB · Pedals: Wellgo resin
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.





