Jamis Boss Coaster

Name: Jamis Boss Coaster
Brand: Jamis

2019 UrbanCruiser Manufacturer page

Last known price: $359

Prices shown first for United States
Suspension: Rigid
Wheels: 26″
Drivetrain: 1 × 1 44t / 18t
Gear range: 100%
Weight: 13.83 kg 30.5 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Coaster brake

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

4 of 16 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

Diamond frame design with 6061 aluminum oversized tubing, sloping top tube design, water bottle bosses, alloy kickstand, and painted steel chainguard Not identified

Suspension

1 part

Fork

Oversized hi-tensile steel tubular unicrown with leading dropout and fender boss Not identified

Drivetrain

6 parts

Bottom bracket

Sealed cartridge, 68 x 122.5mm Not identified
Cassette

18T Not identified
Chain
- KMC
Crankset

Forged alloy crank, 170mm alloy, with 44T compact disc chainring Not identified
Rear derailleur

None
Shifters

None

Brakes

1 part

Brakes

Hi-Stop coaster brake Not identified

Wheels and tires

2 parts

Cockpit and contact points

7 parts

Grips

Comfort style Not identified
Handlebar
- Jamis
Headset

Internal cup, threaded, 1 1/8” Not identified
Pedals

Cruiser platform with TPE comfort insert Not identified
Saddle

Boss Cruiser design with extra padding and heavy-duty, double-loop springs Not identified
Seatpost

Alloy micro-adjust, 27.2 x 300mm, with 31.8mm alloy clamp and cromo seatpin Not identified
Stem

Alloy hi-rise, 180mm quill, 100mm extension, with removeable 2-bolt cap Not identified

Sizes and geometry

6 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size 19"

Table

Geometry diagram unavailable

The drawing needs reach and stack, which the manufacturer did not publish. Available facts remain in the table.

Size

Complete manufacturer geometry table 6 published sizes

Complete manufacturer geometry by size
Measurement
Top tube lengthmm	586	586	595	596	614	624
Seat tube lengthmm	432	356	483	457	533	584
Head tube lengthmm	110	110	125	110	150	200
Head tube angle	69°	69°	70°	70°	70°	70°
Seat tube angle	70°	70°	70°	70°	70°	70°
Chainstay lengthmm	487	487	487	487	487	487
Wheelbasemm	1091	1091	1090	1090	1109	1119
Bottom bracket heightmm	277	277	277	277	277	277
Standover heightmm	736	606	755	620	799	850
Fork rakemm	35	35	35	35	35	35

Not published by the manufacturer: Reach, Stack, Front center, Bottom bracket drop, Trail, Stack/reach ratio, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Aluminum
Fork material: Steel
Bicycle weight: 13.83 kg

30.5 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 44
Largest chainring: 44
Rear sprockets: 1
Smallest sprocket: 18
Largest sprocket: 18
Lowest gear: 63.6 in
Highest gear: 63.6 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Coaster brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: No shifting

Additional specifications

Tire width: 2.35″
Travel: Front: Additional specification: Not available: Yes
Wheel material: Aluminum
Wheel size: 26″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 24.3 km/h
Highest gear: 24.3 km/h

Total gear range 100%

Technical details and class reference

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 63.6–63.6 gear inches

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2019 builds

Differences across 2019 builds
Specification	This bicycle Jamis Boss Coaster	Jamis Boss 7	Jamis Boss 7 STEP-OVER
Frame
Bicycle weight	13.83 kg	15.08 kg	15.08 kg
Drivetrain
Rear sprockets	1	7	7
Smallest sprocket	18	14	14
Largest sprocket	18	28	28
Lowest gear	63.6 in	40.9 in	40.9 in
Highest gear	63.6 in	81.7 in	81.7 in
Brakes
Brake type	Coaster brake	Rim brake	Rim brake
Cockpit
Shifting	No shifting	Mechanical	Mechanical