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Flightline One 27.5

Flightline One 27.5

Regular price $499.99
Regular price $499.99 Sale price $499.99
Sale Out of stock

SKU: SKU:11089

The 2021 Flightline One 27.5 model features a brand new X6 series alloy frame design with internal cable routing and an HL suspension fork with 80mm of travel to smooth out all the bumps. The FL One 27.5 model features alloy double-wall rims fitted with a Shimano cassette rear hub, and 2.2" wide tires with a multi-surface tread pattern. For 2021, we have switched to 27.5" wheels as the main wheel size on the FL One models. Following an undeniable trend towards taller and faster rolling wheels than the 26" size, The FL One 27.5 platform is ideally suited for all-around riding and an introduction to fire-roads and easy MTB trails.

Sizing Guide

Size Table
XS5'1" - 5'5"155 - 165
S5'4" - 5'9"162.5 - 175
M5'8" - 6'172.5 - 182.5
L5'11" - 6'3"180 - 190


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  • New FL X6 Series 27.5" frame w/ internal cable 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


FrameNew MY21 Haro Flightline FL4G 6000 series Aluminum | for 27.5" wheels | Internal cable Routing
ForkHL CH-389 | 27.5" 80mm Travel
Frame ShockN/A
ColorsMatte Black / Metallic Blue, Grey Fade
CranksSamox SAC26 Aluminum 42/34/24T | 170/175mm
PedalsNylon body, Chromoly axles,Platform
ChainKMC Z7 | 7-spd | 1/2"*3/32"
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-Brakes
Brake LeversShimano EF-41
Grips/TapeHaro MTB Kraton
HandlebarPivit aluminum 25mm riser bar 31.8mm
StemPivit melt forged, 31.8mm
Headset1-1/8" threadless Internal | loose ball | alloy 10mm top cone
SaddleHaro Flightline
Seat PostPivit alloy micro adjust 30.9x350mm
Seat ClampPivit alloy 34.9mm quick release


Geometry frame chart
Geometry & Sizing
A. Seat Tube (C-T)356mm (14")406mm (16")457mm (18")508mm (20")
B. Top Tube (Effective)566mm (22.3")592mm (23.3")622mm (24.5")633mm (24.9")
C. Head Tube Angle68°68°68°68°
D. Seat Tube Angle72.5°72.5°72.5°72.5°
E. Chainstay Length432mm (17")432mm (17")432mm (17")432mm (17")
F. BB Drop45mm (1.8")45mm (1.8")45mm (1.8")45mm (1.8")
G. Wheelbase1064mm (41.9")1090mm (42.9")1114mm (43.9")1133mm (44.6")
H. Head Tube Length100mm (3.9")100mm (3.9")110mm (4.3")120mm (4.7")
I. Standover667mm (26.3")684mm (26.9")726mm (28.6")750mm (29.5")
J. Stack Height580mm (22.8")580mm (22.8")589mm (23.2")598mm (23.5")
K. Reach383mm (15.1")409mm (16.1")429mm (16.9")444mm (17.5")
L. Fork Heightmm (")mm (")mm (")mm (")
M. Fork Offset33mm (1.3")33mm (1.3")33mm (1.3")33mm (1.3")
N. Stem Length60mm60mm60mm70mm
O. Bar Widthmmmmmmmm
P. Crank Lengthmmmmmmmm

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Customer Reviews

Based on 2 reviews
Good beginning

I am an avid older runner who is interested in multiple sport adventure trips. I purchased the harp on the advice of a local pro at a shop. I have ridden about a month roughly 5 miles a day for easy days and long days of 15. Will keep increasing the long days. The bike has done well for this novice of this activity. The controls are easy to access and I use all 10 gears in the second setting. I have not found setting one or three value yet. My elevation change has been only rolling hills. I would suggest looking into an extension to raise the handlebars if you are 6 ft plus on the large frame. That will be my next upgrade. I agree with the other review the fron shocks are already acting up. What’s up with that haro?

Great Bike! Poor Front Fork.

I'm really happy with my Flightline 1 27.5. The geometry is great and at this price point, you're not likely to find a better set of components (with the exception of the front strut). The geometry gives it snappy response on the trails and the Shimano shifters (when kept in tune) can keep up with dynamic terrain. It is also capable of some trick riding, including wheelies and stoppies, and the bike is relatively light.

However, the front fork assembly leaves a lot to be desired. Within a month of medium level riding (mostly city and roads, some trails and tricks) the front strut was nearly shot, jumping and stuttering on both compression and release. Quite a bit of the internal grease leaked out around the seals, and the preload knob started to seize up. I would definitely expect to have to replace it within a year of riding.

Also, a sideways force (such as standing on one pedal) will cause the front wheel to flex out of plane at least 3/8 inch either side, resulting in brake rubbing (the rear wheel does flex some too, but not as much). It's not a safety hazard, but it can take you by surprise on a trail when the brake engages in a tight turn. The bike does have mounts for disk brakes, which would likely eliminate that.

*Specifications are subject to change without notice

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