Rear tire: 26×2.35.
Velopedia Bicycle Archive
2021 Jamis Earth Cruiser 1
Original specifications: 26 wheels · 29.25 lbs published weight · geometry for 2 published sizes.
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At a glance
Archive #900001717- Model year
- 2021
- Category
- Cruiser
- Original MSRP
- $549.95
- Sizes
- M, L
- Colors
- Kinetic Grey, Mash, Radiant Blue
- Weight
- 29.25 lbs
- Geometry
- 2 manufacturer sizes
- In this record
- 18 specifications · 4 archived images · original MSRP · geometry
Model history 12 other years
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Identification clues
2021 archived details
- Published colors
- Kinetic Grey, Mash, Radiant Blue
- Frame
- Steel
Clues, not proof of model year. Colors vary and components may have been replaced.
Original buildSteel · 26
Frameset
| Frame Construction | Classic Cantilever design with 6061 aluminum tubing, includes kickstand and painted steel chainguard |
|---|---|
| Frame Material | Steel |
| Fork | Hi-tensile unicrown with radiused blades |
Drivetrain
| Crankset | Forged alloy crank, 170mm, with 44T chainring |
|---|---|
| Bottom Bracket | Sealed cartridge, 68 x 122.5mm |
| Cassette | 18T |
| Chain | KMC Z410NP, silver |
| Pedals | Cruiser platform with grip tape |
Brakes
| Brakes | Hi-Stop coaster brake |
|---|
Cockpit & Contact Points
| Headset | Internal cup, threaded, 1 1/8” |
|---|---|
| Handlebar | Jamis Cruise-control comfort bar |
| Stem | Alloy hi-rise, 180mm quill, 100mm extension, with removeable 2-bolt cap |
| Saddle | Earth Cruiser Comfort with memory foam padding, synthetic suede top, burnished sides and bumper springs |
| Seatpost | Alloy micro-adjust, 27.2 x 300mm, with 31.8mm alloy clamp and cromo seatpin |
Wheels & Tires
| Wheels | Alex Zuma 36H black anodized alloy rims with alloy nutted front hub and Hi-Stop CB rear, 14 gauge stainless steel spokes |
|---|---|
| Front Tire | CST Metropolitan Palm Bay, 26” x 2.35 |
| Rear Tire | CST Metropolitan Palm Bay, 26” x 2.35 |
| Wheel Size | 26 |
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Geometry
Frame measurements by size.
Reference drawing
Select an available measurement to locate it on the frame.
All geometry measurements2 sizes · 9 measurements
| Measurement | MD | LG |
|---|---|---|
| Effective top tube | 626 mm | 666 mm |
| Head tube | 130 mm | 140 mm |
| Head-tube angle | 69° | 69° |
| Seat-tube angle | 67° | 67° |
| Chainstay / rear center | 475 mm | 475 mm |
| Wheelbase | 1107 mm | 1147 mm |
| Bottom-bracket height | 280 mm | 280 mm |
| Standover height | 776 mm | 820 mm |
| Fork offset / rake | 55 mm | 55 mm |
Dimensions as 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
27.2 x 300mm, with 31.8mm alloy clamp and cromo seatpin

Race Face Ride XC Seatpost Black, 27.2x375mm
Replacement option
26” x 2.35
14 gauge stainless steel spokes
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.
Service essentialsQuick reference before buying parts
Archived specifications for reference. Check the fitted parts before ordering.
- Front tire
- CST Metropolitan Palm Bay, 26” x 2.35Check: Verify the fitted tire’s size marking and rim type.
- Rear tire
- CST Metropolitan Palm Bay, 26” x 2.35Check: Verify the rear size; it may differ from the front.
- Seatpost diameter
- 27.2 mmCheck: Read the post’s diameter marking; seat-clamp size differs.
- Bottom bracket / shell
- Sealed cartridge, 68 x 122.5mmCheck: Verify shell type and width, crank interface, and spindle length or spacers.
Not confirmed in this record: Drivetrain. Check the fitted parts for these details.
Bike-specific inspection checklist 19 checks based on 5 archived component groups Open checklistClose checklist
This checklist uses the archived equipment for this bike. It cannot confirm the condition, service history or later component changes of the example in front of you.
Identity and fit
Follow the full used-bike inspection order →Archived: 2021 Jamis Earth Cruiser 1 · Cruiser · Published sizes: M, L
Frame and fork
Inspect the frame and fork →Archived: Frame: Classic Cantilever design with 6061 aluminum tubing, includes kickstand and painted steel chainguard · Fork: Hi-tensile unicrown with radiused blades
Drivetrain
Check drivetrain wear →Archived: Crankset: Forged alloy crank, 170mm, with 44T chainring · Bottom bracket: Sealed cartridge, 68 x 122.5mm · Cassette: 18T · Chain: KMC Z410NP, silver
Brakes
Inspect the brakes →Archived: Brakes: Hi-Stop coaster brake
Wheels and tires
Check wheels and tires →Archived: Wheel size: 26 · Wheels: Alex Zuma 36H black anodized alloy rims with alloy nutted front hub and Hi-Stop CB rear, 14 gauge stainless steel spokes · Front tire: CST Metropolitan Palm Bay, 26” x 2.35 · Rear tire: CST Metropolitan Palm Bay, 26” x 2.35
Controls and contact points
Archived: Headset: Internal cup, threaded, 1 1/8” · Handlebar: Jamis Cruise-control comfort bar · Stem: Alloy hi-rise, 180mm quill, 100mm extension, with removeable 2-bolt cap · Seatpost: Alloy micro-adjust, 27.2 x 300mm, with 31.8mm alloy clamp and cromo seatpin · Saddle: Earth Cruiser Comfort with memory foam padding, synthetic suede top, burnished sides and bumper springs · Pedals: Cruiser platform with grip tape
Before and during the test ride
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Gallery4 images
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Specifications are presented as a reference. Components may vary by market, size, production run, or later manufacturer revisions.




