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Gravity FSX Advent275 1BY
27.5 Tires, Aluminum, Full Suspension Mountain Bike, 1BY9 Speed
SALE $399
$1295
FAST FREE Delivery 48 USA* | 30 Day Money-Back Guarantee*
  • Light/Strong 27.5 Aluminum Design
  • Advanced 1BY9 Drivetrain
  • Powerful Disc Brakes
  • Adjustable CoilOver Rear Shock
  • Advanced LongTravel Forks

Gravity FSX Advent275 1BY9 Size Chart | Between sizes? Size down for more crotch clearance
15in: standover 26.1", fits* upto 5'6"
17in: standover 27.5", fits* upto 5'8"
19in: standover 29", fits* upto 6'
21in: fits* 6'1" and up
*approx. sizing - your final choice is up to personal preferences

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AK/PR/HI additional cost | LiveChat or Email for PO Box/APO/FPO Options/Costs | Electric Bikes Can't Ship to AK/PR/HI/APO
Bike Assembly is easy, most are up to 90% assembled.

Watch an 11YO assemble his own bike Click >HERE<

 Click For> Sample Assembly instructions and videos
If you don't feel confident working on it, we suggest taking it to a local bike shop for final assembly / safety checks.
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Save Up to 60% Off* FSX Advent275 1BY, Disc Brake, Full Suspension Mountain Bikes

Full Suspension 27.5 and OffRoad Specific Design: Specially engineered for stability, speed and ride quality. Extra clearance for wide tires, muddy, tough, trail riding. Top-Tier, Custom touches like coil over rear shocks, water bottle mounting points. Butted and Shaped Aluminum render a durable ride while retaining power transfer.

1BY Drivetrains are used by 99% of top MTB riders. MICROShift 1BY is highly rated. Smooth shifting, Lighter, less maintenance than double or triple drivetrains with nearly the same gear range. The 27.5 platform is great if you want a fast rolling but nimble, trail-tested bike this could be the one.

TRUSTED SELLER SINCE 1997
A+ RATED With BBB
Over A Million Happy Customers

One of our most popular full suspension bikes ever: FSX are trail tested and loved by thousands of customers. Avanced MICROShift 1BY9 Speed drivetrain is lighter, shifts smoother than heavier, more complicated triple crank set-ups.

Engineered from advanced aluminum with CantiBeam single-pivot suspension plus LongTravel forks. Look familiar? They are built by one of the top Taiwan bicycle factories in the world who builds for other high end brands. 

Compare to $1100+ 27.5 full suspension mountain bikes. Powerful disc brakes, proven geometry, trail-ready parts make this FSX a smart bang for buck choice.

Model Gravity FSX Advent275 1BY Mongoose Impasse Giant Trance X3
Price $399 $549 $1899
Weight* 33.9 lbs 39.4 lbs 33.1 lbs
Features Aluminum Frame Aluminum Frame Aluminum Frame
       
Note *Weights can vary +/-5% due to size/production variables
Frame
27.5 Oversized Bearing CantiBeam Link SinglePivot, Custom Formed TIG Welded 6061 Aluminum Front Triangle with Hydroformed tubes. Rear Triangle with replaceable rear derailleur hanger
Fork
Advanced 27.5 Suspension Forks, preload adjustable Forks
Bar / Stem / Saddle / Seatpost
Medium rise Aluminum BB BLK / Aluminum AHEAD Stem / Padded MTB Seat / MTB Aluminum Alloy Adjustable Post (insert min 2 inches below lowest top tube weld / maintain clamp collar tightness)
Rear Shock
Rear KS Coil-Over Adjustable Rear Shock
Shifters / Derailleurs
Shifter microShift Advent SL-Trigger Shifter / Derailleur, Front NA / Derailleur, Rear MICROShift Advent 9 Speed with Clutch
Chain / Gears
KMC 9Speed NARROW / Cassette microShift Advent H-Series CS-H093 11-42t
Cranks / Bottom Bracket
MTB LASCO, Aluminum arms, 32T / Square Taper bottom bracket
Brakes
Tektro MECHANICAL DISC BRAKE w/ Stainless Steel 160mm ROTORS
Wheels / Tires
Double wall 6061 T6 aluminum rims, Ball Bearing Hubs, QR Axles / Black Wall 27.5x2.1, High Grip OffRoad Tread Design
Motor/Battery/Controller
n/a (does not apply)
Weight / Widest Tire
Approx. 33.9 lbs / Max Tire width approx 27.5x2.3" (not guaranteed due to mfg variance)
Extras
FREE 9/16 Platform Pedals
Size 15 17 19 21    
Head Tube Angle 71 71 71 71    
Seat Tube Angle 73 73 73 73    
Head Tube Length (mm) 115 115 115 115    
Effective Top Tube (inch) 21.02 21.9 22.56 23.54    
Chainstay (mm) 430 430 430 430    
Standover (inch) 26.2 27.5 29.3 30.5    

Gravity FSX: Customer Reviews

David “Assembly was easy and straight forward...great price and highly recommend it for the beginner to intermediate riders...a very satisfied customer.”

John H. "... this bike is all me!I can fly down hill on this bike and stop on a dime, or veer hard with it…Going up hill, if you got the leg power and the lungs it'll do it....get a lot of compliments on the bike's sleek look too."

New Mexico. Joey V. “…on a Mountain trail with a friend who is highly experienced with MTB and stayed toe to toe with them...took on some tough rocks and some tough bumps without any malfunctions.. am super happy with my buy...I give this bike a high score. Not only does it perform on the Mountain but it gets me to and from work....get one hell of a deal by buying this...Very pleased...”

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