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BBB A+Rated
BBB A+Rated
FSX 27.5 Plus Size Guide*
15in / Small: standover 28.5", fits approx. 5'6" to 5'9"
17in / Small-Medium: standover 29.5", fits approx. 5'10" to 6'
19in / Medium-Large: standover 30.25", fits approx. 6'1" to 6'3"
21in / Large-XL: standover 31.5", fits approx. 6'2" to 6'5"
*Sizing is a personal preference. The final choice is up to you. Between sizes? Size down for easier standover or lower cockpit feel. Size up for longer arms, legs or torso.
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Price includes ground shipping to the 48 United States. Ships signature required. AK, HI, PR, PO Box, APO/FPO may require additional charges or arrangements.
Bikes come up to 90 percent assembled. We recommend final assembly and safety checks by a local bike shop if you are not comfortable assembling and tuning the bike yourself.
What is the best deal for a 27.5 Plus full suspension mountain bike?
The Gravity FSX 27.5 HD Boost combines massive 27.5 x 2.8 mid-fat tires, a 6061 aluminum full suspension frame, Shimano 2x8 shifting, lockout front suspension and hydraulic disc brakes at a very low factory-direct sale price.
The 27.5 Plus tire setup adds cushion, grip and rollover confidence on rough paths, packed dirt, gravel, roots and trail surfaces, while the full suspension frame adds comfort and control.
Full Suspension + Mid-Fat Tires gives riders a rare combination that is hard to find on current mainstream full suspension bikes.
TOP REVIEWS Gravity FSX owners report strong value, easy assembly and trail-ready performance for the money.
The Gravity FSX 27.5 HD Boost is a 27.5 Plus full suspension mountain bike built around massive 27.5 x 2.8 mid-fat tires. It combines a 6061 aluminum full suspension frame, lockout 27.5 Plus suspension fork, adjustable rear shock, Shimano 2x8 TriggerShift drivetrain and Shimano hydraulic disc brakes.
The 27.5 Plus tire setup gives extra cushion, traction and rollover confidence compared with narrower trail tires. This bike is aimed at riders who want full suspension comfort, mid-fat grip and a very low factory-direct sale price.
ON SALE for $899: Compare at $1999 with FREE 48-state delivery. Limited quantities, ships signature required.
| Model | Gravity FSX 27.5 HD Boost |
Trek Fuel EX 5 Gen 7 | Canyon Spectral 5 |
|---|---|---|---|
| Sale / Published Price | $899 | $2,999 | $2,249 |
| Tire Width | 27.5 x 2.8" Mid-Fat | Up to 29 x 2.50" max tire | 2.4" tires |
| Pedals | YES | NO not in published spec | NO pedals included |
| Published / Listed Weight* | 36.2 lbs | 37.53 lbs, size M with sealant, no tubes | 34.8 lbs, size M |
| *Note | Weights vary by size, parts, tubes/sealant and mfg changes. | ||
| Size | 15 inch | 17 inch | 19 inch | 21 inch |
|---|---|---|---|---|
| Seat Tube Angle | 73.0 | 73.0 | 73.0 | 73.0 |
| Standover at BB (inch) | 27.590 | 28.502 | 28.978 | 29.889 |
| Chain Stay (mm) | 450 | 450 | 450 | 450 |
| Head Tube Angle | 71.0 | 71.0 | 71.0 | 71.0 |
| Head Tube Length (mm) | 100.0 | 100.0 | 115.0 | 125.0 |
| Effective Top Tube (mm) | 555 | 585 | 615 | 641 |
| Notes | Units in mm unless otherwise noted. HT / ST angles in degrees. Standover at center axis of BB, 27.5 x 2.1 tire in original chart. ETT calculated from center axis top of HT. | |||
We have sold thousands of Gravity FSX full suspension mountain bikes. This FSX full suspension frame has some of the best quality and design for the money we have seen. Customers who own FSX bikes send friends and family to buy these excellent bikes all the time.
Here is what just a few customers say:
Joey V., New Mexico: "...on a mountain trail with a friend who is highly experienced with MTB and stayed toe to toe with them... I am falling in love with my bike and I’m super happy with my buy..."
Ethan: "...this bike is amazing... outlasted our top of the line brand name."
Dee: "Overall, great bike... held up well through small jumps and steep DH."
David: "Assembly was easy and straight forward... several steps above any bike I have purchased to this date... a great bike for a great price."
