Jamis DXT A1 STEP-OVER

2020 UrbanFitness Manufacturer page

Last known price: $799

Prices shown first for United States
Fork travel: 75 mm
Wheels: 700c
Drivetrain: 2 × 9 22–36t / 11–36t
Gear range: 536%
Weight: 13.61 kg 30.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Sizes

Size guide

The manufacturer did not publish rider heights for these sizes.

Components

16 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

Size Specific Design Triple-butted 6061 aluminum with redesigned rear triangle, 1 1/8” head tube, oval chain stays with post mount disc brake, 34.9mm seat tube, replaceable derailleur hanger and fender/rack eyelets Not identified

Suspension

1 part

Fork
- SR Suntour

Drivetrain

7 parts

Bottom bracket
- FSA
Cassette
- Shimano CS-HG200 11–36t
CS-HG200
Chain
- KMC Z9 9 speeds
Crankset
- SR Suntour 36/22t
Front derailleur
- Shimano Altus FD-M2020
FD-M2020
Rear derailleur
- Shimano RD-M2000
RD-M2000
Shifters
- Shimano Altus SL-M2010
SL-M2010

Brakes

1 part

Brakes
- Tektro HD-M275 / HD-M276
HD-M275HD-M276

Wheels and tires

2 parts

Rims
- WTB
Tires
- CST

Cockpit and contact points

7 parts

Grips

Anatomic double density kraton grip with gel Not identified
Handlebar
- Jamis
Headset
- FSA
Pedals

Full alloy platform, toe clip attachable Not identified
Saddle
- Selle Royal
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 380mm

Stack 640mm

Wheelbase 1057mm

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	376	380	384
Stackmm	632	640	648
Top tube lengthmm	563	563	576
Seat tube lengthmm	356	457	508
Head tube lengthmm	125	131	135
Head tube angle	70.5°	71°	72°
Seat tube angle	73.5°	74°	73.5°
Chainstay lengthmm	440	440	440
Wheelbasemm	1057	1057	1053
Front centermm	624	624	620
Bottom bracket dropmm	60	60	60
Standover heightmm	641	664	662
Fork rakemm	40	40	40
Trailmm	81	79	71
Stack/reach ratio	1.68	1.68	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: 13.61 kg

30.0 lb

Suspension

Suspension configuration: Hardtail
Front travel: 75 mm

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 22
Largest chainring: 36
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 36
Lowest gear: 17.7 in
Highest gear: 94.9 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic 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

17.7 gear inches

This value is below the central range for this class.

Cohort: Urban / Fitness Model year: 2020
Sample: 220 bicycles with this information
Coverage: 89.0% of the class

Highest gear

94.9 gear inches

This value is below the central range for this class.

Cohort: Urban / Fitness Model year: 2020
Sample: 220 bicycles with this information
Coverage: 89.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.8 km/h
Highest gear: 36.4 km/h

Total gear range 536%

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: 17.7–94.9 gear inches
Class reference (p10–p90): 19.9–131.8 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Urban / Fitness Model year: 2020
Lowest gear: 220 bicycles with this information, 89.0% of the class
Highest gear: 220 bicycles with this information, 89.0% 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 2020 builds

Differences across 2020 builds
Specification	This bicycle Jamis DXT A1 STEP-OVER	Jamis DXT A1	Jamis DXT A2	Jamis DXT A2 STEP-OVER	Jamis DXT A3	Jamis DXT A3 STEP-OVER
Frame
Bicycle weight	13.61 kg	13.61 kg	14.17 kg	14.06 kg	14.51 kg	14.4 kg
Drivetrain
Front chainrings	2	2	3	3	3	3
Smallest chainring	22	22	28	28	28	28
Largest chainring	36	36	48	48	48	48
Rear sprockets	9	9	8	8	7	7
Smallest sprocket	11	11	11	11	12	12
Largest sprocket	36	36	32	32	32	32
Lowest gear	17.7 in	17.7 in	25.4 in	25.4 in	25.4 in	25.4 in
Highest gear	94.9 in	94.9 in	126.6 in	126.6 in	116.0 in	116.0 in
Brakes
Brake type	Hydraulic disc	Hydraulic disc	Hydraulic disc	Hydraulic disc	Mechanical disc	Mechanical disc