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.

Campaign
Original build6061 T6 aluminum · Mountain Mix · 26" wheels

Manufacturer catalog

Published sizes and colors

7 sizes · 2 colors

Manufacturer-published sizes and colors; availability and exact size/color pairings may vary by market or production run.

Published sizes

12"14"17"19"21"womens 14.5"womens 17.5"

Published colors

Gloss White/Midnight BluePlatinum/Gloss Black

Frameset

Frame ConstructionTIG-welded
Frame Material6061 T6 aluminum
ForkIn-Sync Grind 323, 70mm travel
Fork MaterialAluminum/magnesium, single crown

Drivetrain

Component GroupMountain Mix
ShiftersShimano Acera EF35
Front DerailleurSRAM 3.0, top-pull/clamp-on 31.8mm
Rear DerailleurShimano Acera
CranksetCyclone aluminum, 22/32/42 teeth
Bottom BracketLoose ball, 122.5mm spindle
BB Shell Width68mm English
Rear Cogs7-speed, 13 - 34 teeth
ChainKMC UG-50, 1/2 x 3/32"
PedalsWellgo resin

Brakes

BrakesTektro forged linear-pull brakes, Shimano Acera levers

Cockpit & Contact Points

Headset1 1/8" threadless Tange TG-4
HandlebarAluminum, 1" rise
Handlebar ExtensionsNot included
StemJamis aluminum
SaddleJamis ATB
SeatpostAluminum, suspension, 27.2mm diameter

Wheels & Tires

HubsFormula aluminum, Q/R
RimsWeinmann CN-520, 32-hole
SpokesStainless steel, 14ga. (2.0mm) straight gauge
Spoke NipplesBrass nipples
Front Tire26 x 1.95" Cheng Shin
Wheel Size26" wheels

Geometry

Legacy reference · 6 measurements

Historical measurements. Frame size unknown.

All geometry measurementsLegacy reference · 6 measurements
MeasurementLegacy reference
Top tube575 mm
Head-tube angle71°
Seat-tube angle73.5°
Chainstay / rear center425 mm
Wheelbase1059 mm
Fork offset / rake38.1 mm

Frame size not recorded.

Gearing

Lower gears help on climbs. Higher gears suit higher speeds.

RPM

RPM = pedal turns per minute.

Published build42/32/22T · 13–34T · 7-speed
Lowest0.65:1 Highest3.23:1 Total range499%
Estimated speed At 90 RPM Lowest gear4.5 mph Highest gear22.4 mph

Uses front tire 26×1.95; 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.

Try other gearing

Try your current gearingChanged tires or gears? Calculate your setup.

Your changes apply to this calculation. The archived build stays unchanged.

Your gearing setup
Gears

Use up to three front tooth counts, separated by /. For one rear sprocket, enter the same count twice.

Rear tire

Apply the marking on your rear tire or edit its dimensions below. Older or fractional inch sizes need the ISO marking (e.g. 37-590).

For 32-622, width is 32 mm and rim diameter is 622 mm. Use the rear tire on mixed-wheel bikes. Leave both fields empty to compare ratios only.

Gear, dimension and cadence changes update results automatically.

Speeds are estimates. These calculations do not establish component compatibility or available tire clearance.

Parts & serviceability

Find replacement parts

Original specifications
Seatpost · Original
Aluminum

suspension, 27.2mm diameter

Retailer offers
Front tire · Original
26 x 1.95" Cheng Shin Replacement search: 26x1.95 bicycle tire Before ordering: Check rim type and tire clearance.
Brake pads · Original
Tektro forged linear-pull brakes

Shimano Acera levers

More parts (2)Fewer parts
Rear derailleur · Original
Shimano Acera
Shifters · Original
Shimano Acera EF35

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
0 of 11 checked Progress stays in this browser for this record.

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 →

Archived: Frame: TIG-welded · Fork: In-Sync Grind 323, 70mm travel · Aluminum/magnesium, single crown

Archived: Fork: In-Sync Grind 323, 70mm travel

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"

Archived: Brakes: Tektro forged linear-pull brakes, Shimano Acera levers

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.

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