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2021 Jamis Helix A2 Ladies Mountain Bike
2021 Jamis Helix A2 Ladies Mountain Bike
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2021 Jamis Helix A2 Ladies 

FRAME MATERIALS

Lightweight and strong 6061 series aluminum tubing, featuring over-sized & tapered tubing for increased frame stiffness.


PEDALING PLATFORM

The aluminum frame of the Trail X and Helix is beefed up to include a larger 34.9mm seat tube, which allows us to spec an over-sized 31.6mm seat post. The larger diameter post flexes less, providing a firmer pedaling platform.


Top Tube Cable Routing

Running the cables up under the top tube keeps cables and housing out of the muck for more precise and reliable shifting performance.


ZERO STACK Internal Headset

A Zero Stack internal headset places both the cups and bearings inside the head tube instead of outside. This reduces the total stack height (including the head tube), which is beneficial on larger wheeled bikes. The larger diameter head tube also provides a larger weld interface at the critical head/top/down tube junction.


Dual Water Bottle Mounts

Most of our Trail X sizes offer two water bottle mounts located inside the main frame. This provides excellent hydration capacity in an easily accessible position.


Replaceable Derailleur Hanger

Because itÂ’s much easier and much less expensive to replace a derailleur hanger than it is to repair or replace a frame, every Trail X frame offers a replaceable derailleur hanger designed to yield in a crash before the frame does.


Alex TD26 Disc-Specific Rims

Disc hubs twist during braking. This twisting increases “pull” load on the nipples in the spoke bed. The Alex TD26 spoke bed on the rims specified on all Trail X models are cleverly reinforced to resist disc brake torque and prevent spokes & nipples from shearing.


ColourVanilla Mint
Sizes14”, 16”, 18”
Frame6061 aluminum main tubes, over-sized seat tube, zero-stack head tube, over-sized stays, replaceable derailleur hanger
ForkSR Suntour XCE 28 DS 27.5”, coil spring, external preload adjustor, 28mm stanchions, aluminum lowers, 100mm travel
HandlebarJamis XC alloy riser, 31.8mm, 20mm rise, 720mm
StemJamis XC alloy threadless, 31.8mm
Seat PostJamis alloy micro-adjust, 31.6mm, 400mm
SaddleJamis ATB Sport WomenÂ’s
PedalsMTB platform, hi-impact resin
ShiftersShimano EF505, 16 speed
Front DerailleurShimano Altus
Rear DerailleursShimano Tourney, 8 speed
BrakesShimano MT200 hydraulic
BrakesetShimano MT200 hydraulic disc, 160mm rotors
CassetteShimano HG31, 8 speed, 11-32T
ChainKMC Z8.3, 8 speed
CranksetForged Alloy, 36T/22T
Bottom BracketSealed cartridge
RimsAlex TD26 27.5, 32H
HubsAlloy Disc, 32H
Spokes14g, Nickel-plated
TyresCST Patrol, 27.5x2.25