Jamis Ventura A1

2021 RoadRace

Last known price: $1,299

Prices shown first for United States
Suspension: Rigid
Wheels: 700c
Drivetrain: 2 × 9 34–50t / 11–32t
Gear range: 428%
Weight: 9.53 kg 21.0 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Mechanical disc

Sizes

Size guide

44cm
48cm
48cm
51cm
51cm
54cm
54cm
56cm
58cm
61cm

The manufacturer did not publish rider heights for these sizes.

Components

17 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 double-butted 6061 aluminum compact sloping top tube frame design with with redesigned rear triangle, SST tubing diameters and internal cable guides, 1 1.5 – 1 1/8” tapered head tube, butted seat tube for 27.2 seat post, flat mount disc brake mount, replaceable derailleur hanger and fender/rack eyelets Not identified

Suspension

1 part

Fork
- Jamis

Drivetrain

7 parts

Bottom bracket
- FSA
Cassette
- Shimano CS-HG201 9 speeds 11–32t
CS-HG201
Chain
- KMC Z9 9 speeds
Crankset
- FSA VERO PRO 1X 50/34t
Front derailleur
- Shimano Sora FD-R3000 2 speeds
FD-R3000
Rear derailleur
- Shimano Sora RD-R3000 9 speeds
RD-R3000
Shifters
- Shimano Sora ST-R3000
ST-R3000

Brakes

1 part

Brakes
- Shimano Sora

Wheels and tires

2 parts

Cockpit and contact points

7 parts

Grips
- Jamis
Handlebar
- Ritchey
Headset
- FSA
Pedals

Touring platform style, full alloy with toe clips Not identified
Saddle
- Selle Royal
Seatpost
- Ritchey
Stem
- Ritchey

Sizes and geometry

10 sizes Open in the geometry plotter

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

Size 51cm

Table

Reach 365mm

Stack 553mm

Wheelbase 990mm

Head angle 71.5°

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 10 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	358	360	363	368	365	375	373	376	383	388
Stackmm	521	531	538	561	553	580	570	598	616	635
Top tube lengthmm	491	505	505	521	526	537	548	559	571	582
Seat tube lengthmm	440	480	480	510	510	540	540	560	580	610
Head tube lengthmm	115	125	130	155	145	170	160	185	205	225
Head tube angle	70°	70°	71°	71°	71.5°	72°	72°	73°	73°	73°
Seat tube angle	76°	75°	75.5°	75°	74°	74.5°	73°	73°	73°	73°
Chainstay lengthmm	415	415	415	415	415	420	420	420	425	425
Wheelbasemm	984	988	987	1000	990	1001	996	998	1015	1026
Front centermm	579	583	582	595	585	590	586	587	599	610
Bottom bracket dropmm	71	71	69	69	69	68	68	68	66	66
Bottom bracket heightmm	265	265	267	267	267	268	268	268	270	270
Standover heightmm	708	729	734	767	764	786	779	803	821	838
Fork rakemm	50	50	50	50	50	43	43	43	43	43
Trailmm	69	70	63	63	59	64	64	57	59	59
Stack/reach ratio	1.46	1.48	1.48	1.52	1.52	1.55	1.53	1.59	1.61	1.64

Not published by the manufacturer: 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: Carbon
Bicycle weight: 9.53 kg

21.0 lb

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 2
Smallest chainring: 34
Largest chainring: 50
Rear sprockets: 9
Smallest sprocket: 11
Largest sprocket: 32
Lowest gear: 30.8 in
Highest gear: 131.8 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Mechanical disc

Fit and controls

Seatpost: Rigid seatpost
Shifting: Mechanical

Additional specifications

Tire width: 28c
Wheel material: Aluminum
Wheel size: 700c

Technical analysis

3 measures

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

Lowest gear

30.8 gear inches

This value is within the central range for this class.

Cohort: Road / Race Model year: 2021
Sample: 506 bicycles with this information
Coverage: 79.3% of the class

Highest gear

131.8 gear inches

This value is within the central range for this class.

Cohort: Road / Race Model year: 2021
Sample: 506 bicycles with this information
Coverage: 79.3% of the class

Shifting

Mechanical

286 of 638 bicycles with this information use electronic shifting.

Cohort: Road / Race Model year: 2021
Sample: 638 bicycles with this information
Coverage: 100.0% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 11.8 km/h
Highest gear: 50.5 km/h

Total gear range 428%

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: 30.8–131.8 gear inches
Class reference (p10–p90): 30.8–139.2 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Road / Race Model year: 2021
Lowest gear: 506 bicycles with this information, 79.3% of the class
Highest gear: 506 bicycles with this information, 79.3% 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 2021 builds
Specification	This bicycle Jamis Ventura A1	Jamis Ventura A1 Designed for Women	Jamis Ventura A2	Jamis Ventura A2 Designed for Women
Frame
Intended fit	Unisex	womens	Unisex	womens
Bicycle weight	9.53 kg	10.09 kg	10.43 kg	10.32 kg
Drivetrain
Rear sprockets	9	9	8	8
Brakes
Brake type	Mechanical disc	Mechanical disc	Rim brake	Rim brake