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Haro MTB

Flightline One 27.5 ST

Flightline One 27.5 ST

Regular price $429.99
Regular price $579.99 Sale price $429.99
Sale Out of Stock

SKU: SKU:11092

Ladies only? Not the Flightline One ST...One of Haro's most popular models, the FL One 27.5 now also comes in a step-thru frame (all genders welcome). While it is true the majority of these are purchased by women, men needing an easy-to-step-over frame may want to jump on an ST model. The Flightline One 27.5 ST features a newly re-designed X6 series alloy frame with internal cable routing and a HL suspension fork with 80mm of travel to smooth out all the bumps. The FL One ST is now available in 27.5" wheels only (in two frame sizes) and features alloy double wall rims, a Shimano rear cassette hub, and 2.2" wide tires with a multi surface tread-pattern. The FL One 27.5 ST is ideally suited for all-around riding and an introduction to fire-roads and easy MTB trails.

Sizing Guide

Size Table
S ST5'4" - 5'9"162.5 - 175
M ST5'8" - 6'172.5 - 182.5


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  • New FL X6 Series 27.5" Step-thru frame w/ internal routing
  • HL CH-389 27.5" suspension fork w/ 80mm travel
  • 1-1/8" internal Threadless headset
  • Aluminum 42/34/24T crankset
  • Shimano Tourney TY-300 rear derailleur
  • Shimano EF-41 3x7-spd shifters
  • Shimano CS-HG200 7-spd 12-32T cassette
  • Shimano TY500 7-spd cassette rear hub
  • Aluminum double-wall rims

Collapsible content


FrameNew MY21 Haro Flightline FL4G 6000 series Aluminum | Step-Thru for 27.5" wheels | Internal cable Routing
ForkHL CH-389 | 27.5" 80mm Travel
ColorsCharcoal / Seafoam, Desert Fade
CranksSamox SAC26 Aluminum 42/34/24T | 170/175mm
PedalsNylon body | Chromoly axles | Platform
ChainKMC Z7 | 7-spd | 1/2"x3/32
Bottom BracketSealed cartridge
Front DerailleurShimano Tourney TY-500
Rear DerailleurShimano Tourney TY-300
Derailleur ShifterShimano EF-41 3x7-spd
Freewheel/CassetteShimano CS-HG200 7-spd cassette 12-32T
TiresH-5129 27.5 x 2.2"
Wheels/RimsXD-180 aluminum double wall
HubsPivit alloy front hub | Shimano TY-500 cassette rear hub | 32h
BrakesPromax TX-121 V-Brake
Brake LeversShimano EF-41
Grips/TapeHaro MTB Kraton
HandlebarPivit aluminum 25mm riser bar 31.8mm
StemPivit melt forged | 31.8mm
Headset1-1/8" threadless w/ steel cups | loose ball | Nylon Top
SaddleHaro Flightline
Seat PostPivit aluminum micro adjust 30.9x350mm
Seat ClampPivit aluminum 34.9mm quick release


Geometry frame chart
Geometry & Sizing
A. Seat Tube (C-T)355mm (14")430mm (16.9")
B. Top Tube (Effective)572mm (22.5")585mm (23")
C. Head Tube Angle68°68°
D. Seat Tube Angle73°73°
E. Chainstay Length432mm (17")432mm (17")
F. BB Drop50mm (2")50mm (2")
G. Wheelbase1091mm (43")1089mm (42.9")
H. Head Tube Length110mm (4.3")120mm (4.7")
I. Standover643mm (25.3")653mm (25.7")
J. Stack Height597mm (23.5")606mm (23.9")
K. Reach390mm (15.4")400mm (15.7")
L. Fork Heightmm (")mm (")
M. Fork Offset33mm (1.3")33mm (1.3")
N. Stem Lengthmmmm
O. Bar Widthmmmm
P. Crank Lengthmmmm

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*Specifications are subject to change without notice

*Actual retail price may vary based on any added dealer freight, tax, and assembly fees