Jamis DXT STEP-OVER

2019 UrbanFitness Manufacturer page

Last known price: $509

Prices shown first for United States
Fork travel: 75 mm
Wheels: 700c
Drivetrain: 3 × 7 28–48t / 14–34t
Gear range: 416%
Weight: 14.4 kg 31.7 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Mechanical disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

14 of 19 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

6061 aluminum formed top and down tube, 1 1/8” head tube, seat stays disc brake mounts, 34.9mm seat tube, replaceable derailleur hanger, fender/rack eyelets and ring lock munt eyelets Not identified

Suspension

1 part

Fork
- SR Suntour

Drivetrain

7 parts

Bottom bracket
- VP
Cassette
- Shimano Tourney TZ MF-TZ500 14–34t
MF-TZ500
Chain
- KMC
Crankset

Forged alloy crank, 48/38/28T, 170mm (15-17”), 175mm (19-23”) Not identified
Front derailleur
- Shimano Tourney FD-TY510
FD-TY510
Rear derailleur
- Shimano Tourney RD-TY300 7 speeds
RD-TY300
Shifters
- Shimano
SL-EF41

Brakes

1 part

Brakes
- Tektro
MD-280

Wheels and tires

2 parts

Cockpit and contact points

7 parts

Grips

MTB Type Grip Not identified
Handlebar
- Jamis
Headset

Internal Cup, threadless, 1 1/8” Not identified
Pedals

Platform style Not identified
Saddle
- Jamis
Seatpost
- Jamis
Stem
- Jamis

Sizes and geometry

3 sizes Open in the geometry plotter

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

Size 18"

Table

Reach 369mm

Stack 639mm

Wheelbase 1048mm

Head angle 71.0°

Seat angle 74.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 700c wheel; exact published values are in the table below.

Size Reach Stack

Complete manufacturer geometry table 3 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	358	369	384
Stackmm	632	639	648
Top tube lengthmm	540	552	576
Seat tube lengthmm	356	457	508
Head tube lengthmm	130	135	140
Head tube angle	70.5°	71°	72°
Seat tube angle	73.5°	74°	73.5°
Chainstay lengthmm	435	435	435
Wheelbasemm	1041	1048	1055
Front centermm	612	619	626
Bottom bracket dropmm	55	55	55
Standover heightmm	696	717	719
Fork rakemm	40	40	40
Trailmm	77	74	66
Stack/reach ratio	1.77	1.73	1.69

Not published by the manufacturer: Bottom bracket height, 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: Aluminum
Bicycle weight: 14.4 kg

31.7 lb

Suspension

Suspension configuration: Hardtail
Front travel: 75 mm

Drivetrain

Derived by Bikelake

Front chainrings: 3
Smallest chainring: 28
Largest chainring: 48
Rear sprockets: 7
Smallest sprocket: 14
Largest sprocket: 34
Lowest gear: 23.9 in
Highest gear: 99.4 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Mechanical disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Fork spring: Coil
Tire width: 42c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

2 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Lowest gear

23.9 gear inches

This value is within the central range for this class.

Cohort: Urban / Fitness Model year: 2019
Sample: 245 bicycles with this information
Coverage: 93.8% of the class

Highest gear

99.4 gear inches

This value is below the central range for this class.

Cohort: Urban / Fitness Model year: 2019
Sample: 245 bicycles with this information
Coverage: 93.8% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 9.1 km/h
Highest gear: 38.1 km/h

Total gear range 416%

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: 23.9–99.4 gear inches
Class reference (p10–p90): 21.8–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Fitness Model year: 2019
Lowest gear: 245 bicycles with this information, 93.8% of the class
Highest gear: 245 bicycles with this information, 93.8% of the class

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 DXT STEP-OVER	Jamis DXT	Jamis DXT Comp	Jamis DXT Comp STEP-OVER	Jamis DXT Sport	Jamis DXT Sport STEP-OVER
Frame
Intended fit	Unisex	Unisex	Unisex	Unisex	Unisex	womens
Bicycle weight	14.4 kg	14.51 kg	13.61 kg	13.49 kg	14.17 kg	14.06 kg
Drivetrain
Smallest chainring	28	28	26	26	28	28
Rear sprockets	7	7	9	9	8	8
Smallest sprocket	14	14	11	11	11	11
Largest sprocket	34	34	32	32	32	32
Lowest gear	23.9 in	23.9 in	23.6 in	23.6 in	25.4 in	25.4 in
Highest gear	99.4 in	99.4 in	126.6 in	126.6 in	126.6 in	126.6 in
Brakes
Brake type	Mechanical disc	Mechanical disc	Hydraulic disc	Hydraulic disc	Hydraulic disc	Hydraulic disc