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2025 Jamis

HELIX A2

A 27.5″ aluminum frame hardtail women’s crosscountry bike with mid-range components.
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Manufacturer Price

$729
Weight32.0 lbs  
FrameAluminum
SuspensionHardtail, 100mm
ForkSuntour XCE
Wheels27.5″ Aluminum
Drivetrain2 × 8
GroupsetTourney, Altus
BrakesShimano Hydraulic Disc
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Insights
Ride Feel

Based on frame geometry and build specs.

Terrain
easyextreme
Handling
nimblestable
HELIX A2
Other Crosscountry bikes
Gearing

A bike with lower gearing will be easier to ride up steep hills, while a higher top end means it will pedal faster down hills.

Lowest gear

(climbing)

27 mph

HELIX A2

27 mph

Similar Bikes

Highest gear

(descending)

Spec Level

Based on build material and quality level of the frame, fork, wheelset, groupset, suspension system, and more.

Geometry
Specs
Build
Frame

6061 aluminum main tubes, over-sized seat tube, zero-stack head tube, over-sized stays, replaceable derailleur hanger

Fork

SR Suntour XCE 28 DS 27.5”, coil spring, external preload adjustor, 28mm stanchions, aluminum lowers, 100mm travel

Travel100mm

Spring TypeCoil

Bottom Bracket

Sealed cartridge

Headset

Zero-stack internal cup, 8mm cone spacer

Stem

Jamis XC alloy threadless, 31.8 x 10 ̊ rise x 75mm (14”/16”), 90mm (18”)

Handlebar

Jamis XC alloy riser, 31.8 x 20mm rise x 680mm

Saddle

Jamis ATB Sport Women’s

Seatpost

Jamis alloy micro-adjust, 31.6 x 350mm (14”) 400mm (16”/18”)

TypeRigid

Pedals

MTB platform, hi-impact resin

Grips

Kraton

Groupset
Rear Derailleur

Shimano Tourney

Front Derailleur

Altus

Crank

Forged Alloy, 36/22T

Shifters

Shimano EF505, 2×8-speed

Cassette

Shimano HG31, 8-speed, 11-32T

Chain

KMC Z8.3, 8-speed

Brakes

Shimano MT200 hydraulic disc, Shimano RT26 160mm rotors

TypeShimano Hydraulic Disc

Wheels
Rims

Alex TD26 27.5” double wall rims, 32H, alloy disc hubs, 14G black electroplated spokes

Tires

CST Patrol, 27.5 x 2.25”

Rider Notes
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First added June 16

Last updated May 2

Not listed for 27 days