Lowest0.73:1
Highest3.82:1
Total range521%
Estimated speed At 90 RPM
Lowest gear
Highest gear
Uses front tire 26×1.95; rear size isn’t listed.
Velopedia Bicycle Archive
2003 Jamis Explorer 4.0
Original specifications: Shimano Alivio · 8-speed · mechanical rear derailleur · 26" wheels · 31.75 lb published weight.
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At a glance
Archive #30488- Model year
- 2003
- Category
- City & Commuter
- Original MSRP
- $429.95
- Sizes
- 12", 14", 17", 19", 21", womens 14.5", womens 17.5"
- Colors
- Gun Metal Gray/Platinum, Midas Gold/Metallic Black
- Weight
- 31.75 lb
- Geometry
- Legacy reference
- In this record
- 27 specifications · archived image · original MSRP · geometry
Model history 3 other years
Browse other years
Compare side by side
Identification clues
2003 archived details
- Published colors
- Gun Metal Gray/Platinum, Midas Gold/Metallic Black
- Frame
- 6061 T6 aluminum
- Original equipment
- Comfort Mix
Clues, not proof of model year. Colors vary and components may have been replaced.
Original build6061 T6 aluminum · Comfort Mix · 26" wheels
Frameset
| Frame Construction | TIG-welded |
|---|---|
| Frame Material | 6061 T6 aluminum |
| Fork | Rock Shox Metro GPS |
| Fork Material | Aluminum/magnesium, single crown |
Drivetrain
| Component Group | Comfort Mix |
|---|---|
| Shifters | SRAM MRX |
| Front Derailleur | Shimano Tourney TY-32, bottom-pull/clamp-on 31.8mm |
| Rear Derailleur | Shimano Alivio |
| Crankset | Shimano Alivio, 22/32/42 teeth |
| Bottom Bracket | Sealed, 111mm spindle |
| BB Shell Width | 68mm English |
| Rear Cogs | 8-speed, 11 - 30 teeth |
| Chain | Shimano CN-IG31, 1/2 x 3/32" |
| Pedals | Victor VP aluminum |
Brakes
| Brakes | Tektro linear-pull brakes, Tektro Tenera levers |
|---|
Cockpit & Contact Points
| Headset | 1 1/8" threadless steel |
|---|---|
| Handlebar | Steel, 1" rise |
| Handlebar Extensions | Not included |
| Stem | Aluminum, adjustable |
| Saddle | Viscount Super Comfort |
| Seatpost | Aluminum, suspension, 27.2mm diameter |
Wheels & Tires
| Hubs | Aluminum, Q/R |
|---|---|
| Rims | Weinmann CN-520, 36-hole |
| Spokes | Stainless steel, 14ga. (2.0mm) straight gauge |
| Spoke Nipples | Brass nipples |
| Front Tire | 26 x 1.95" Kenda Kross |
| Wheel Size | 26" wheels |
No specifications match. Try a component name or clear your search.
Geometry
Historical measurements. Frame size unknown.
Reference drawing
Size
Measurement
Measurement
—
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 | 445 mm |
| Wheelbase | 1059 mm |
| Fork offset / rake | 45 mm |
Frame size not recorded.
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
Shimano CN-IG31
1/2 x 3/32"
Retailer offers
SRAM PC-830 Chain One Color, 8 Speed
Replacement option
Shimano CN-IG31 on eBaySponsored links
Aluminum
suspension, 27.2mm diameter
Retailer offers
Cane Creek Thudbuster ST Seatpost Black, 27.2mm
Replacement option
More parts (3)Fewer parts
Tektro linear-pull brakes
Tektro Tenera levers
Shimano Alivio
22/32/42 teeth
Shimano Alivio
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" Kenda Kross
- Drivetrain
- 8-speed
- Seatpost diameter
- 27.2 mm
- Bottom bracket / shell
- Sealed, 111mm 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: Rock Shox Metro GPS · Aluminum/magnesium, single crown
Drivetrain
Check drivetrain wear →Archived: Group: Comfort Mix · Shifters: SRAM MRX · Front derailleur: Shimano Tourney TY-32, bottom-pull/clamp-on 31.8mm · Rear derailleur: Shimano Alivio · Crankset: Shimano Alivio, 22/32/42 teeth · Bottom bracket: Sealed, 111mm spindle · Rear cogs: 8-speed, 11 - 30 teeth · Chain: Shimano CN-IG31, 1/2 x 3/32"
Brakes
Inspect the brakes →Archived: Brakes: Tektro linear-pull brakes, Tektro Tenera levers
Wheels and tires
Check wheels and tires →Archived: Wheel size: 26" wheels · Rims: Weinmann CN-520, 36-hole · Hubs: Aluminum, Q/R · Front tire: 26 x 1.95" Kenda Kross
Controls and contact points
Archived: Headset: 1 1/8" threadless steel · Handlebar: Steel, 1" rise · Stem: Aluminum, adjustable · Seatpost: Aluminum, suspension, 27.2mm diameter · Saddle: Viscount Super Comfort · Pedals: Victor VP aluminum
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.