• Salsa Beargrease Carbon GX Eagle 27.5 bike side view carbon color
  • Salsa Beargrease Carbon GX Eagle 27.5 bike front three-quarter view carbon color
  • Salsa Beargrease Carbon GX Eagle 27.5 bike downtube detail
  • Salsa Beargrease Carbon GX Eagle 27.5 bike top tube near seat tube detail
  • Salsa Beargrease Carbon GX Eagle 27.5 bike rear dropout drive side detail
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2018 Beargrease Carbon GX Eagle

2018 Beargrease Carbon GX Eagle

Archived

Beargrease is our carbon hotrod fat bike, designed to convert strength and determination into speed. The super light chassis and the sure-footed rollover of 27.5 x 4″ wheels and tires reinforce Beargrease’s objective; to keep you in the express lane wherever you’re headed. Point your front wheel towards the start line of a race on groomed snow or singletrack, challenge yourself on an overnight bikepacking trip, or just get your trail riding on.

This is an archived bike model. Explore the current range of Salsa bikes here.

Warning for Residents of California

⚠️ WARNING: This product can expose you to chemicals known to the State of California to cause cancer and birth defects or other reproductive harm. For more information go to www.P65Warnings.ca.gov.

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Product Details

Build Kit

  • Frame: Beargrease Carbon
  • Fork: Salsa Makwa Carbon
  • Color: Black
  • Rear Shock: N/A
  • Front Der: N/A
  • Rear Der: SRAM GX Eagle
  • Cassette: SRAM XG-1275 Eagle 10-50t
  • Chain: SRAM GX Eagle
  • Crankset: SRAM GX Eagle, 30t direct-mount
  • Shifter: SRAM GX Eagle
  • Brakes & Rotors: SRAM Level T, Centerline 160mm
  • Headset: Cane Creek 40
  • Stem: Salsa Guide Trail
  • Handlebar: Salsa Salt Flat Deluxe
  • Grips: Salsa File Tread Lock-On 
  • Seatpost: Salsa Guide
  • Saddle: WTB Volt Race
  • Front Wheel: HED Big Half Deal Carbon 27.5" x 85mm w/ Brickhouse 150mm Hub
  • Rear Wheel: HED Big Half Deal Carbon 27.5" x 85mm w/ Brickhouse 177mm Hub
  • Tires: Maxxis Minion FBF front and FBR rear, 27.5 x 3.8", 120 tpi, EXO, tubeless-ready

Frame Specs

  • Design Wheel/Tire Size: 26 x 4.0" on 82mm rim
  • Alternative Wheel/Tire Sizes: 26 x 3.8–4.6" on up to 100mm rim (1x drivetrain only) 27.5 x 3.0–4.0" on up to 80mm rim 29 x 2.25–3.0"
  • Suspension Fork Length (Travel): 501–511mm (100mm)
  • Rigid Fork Length: 483–486mm
  • Fork Offset: 50–51mm
  • Headset – Upper: IS41
  • Headset – Lower: IS52
  • Seatpost: 27.2mm
  • Seat Collar: 35.0mm
  • Front Derailleur Type: Compact 2x, top-pull only
  • Front Derailleur Mount: High direct mount (43.5mm offset) via ø35mm clamp Problem Solvers (FS2324)
  • Bottom Bracket: PressFit 41 x 121mm
  • Crankset: 2x: 36/24t max fat bike version, 1x: 32t max fat bike version
  • Rear Brake (Rotor): 74mm post (140–160mm)
  • Rear Spacing: 177 x 12mm thru-axle
  • Rear Thru-Axle: 12 x 208L, TP = 1.5, TL = 20
  • Derailleur Hanger: FS2323
  • Bottles: SM = 1, MD-XL = 2
  • Stem Clamp: ø28.6mm
  • Crown Race: ø40mm
  • Front Brake (Rotor): 74mm post mount (160–180mm)
  • Front Spacing: 150 x 15mm thru-axle
  • Front Thru-Axle: 15 x 198L, TP = 1.5, TL = 9

Geometry

Geometry Diagram
SM MD LG XL
Top Tube Effective Metric 580 605 625 640
Seat Tube Length Metric 381 432 483 533
Head Tube Length Metric 105 125 140 150
Head Tube Angle 68.5 68.5 68.5 68.5
Seat Tube Angle 73.5 73 73 73
BB Drop Metric 63 63 63 63
Chainstay Length Metric 440 440 440 440
Fork Length Metric 483 483 483 483
Fork Offset Metric 51 51 51 51
Wheelbase Metric 1103.1 1124 1145.3 1161.1
Stack Metric 594.4 613 627 636.3
Reach Metric 403.9 417.6 433.3 445.5
Standover Metric 708.2 740.1 780.6 818.3
Rider Height Metric 165–175cm 175–183cm 180–191cm 188cm–UP
BB Center to Center Metric
Stem Length 60 70 80 80
Crank Length 170 170 175 175
Handlebar Width 750mm 750mm 800mm 800mm
Seatpost Offset Metric 0 0 0 0

 

Measurements based on:

  • A Salsa Makwa 150 Carbon or Bearpaw 150 Carbon fork, both of which are equivalent to a RockShox Bluto (100mm) at 25% sag
  • A 26 x 4.0" tire measuring 742mm in diameter
  • Standover (P) measured vertically to top of toptube from a position 50mm forward of BB center

Supportive Documents

Support Document links

Additional Features

High-Modulus Carbon Fiber Frame

This material offers improved stiffness, better vibration damping, excellent toughness and weight savings compared to other materials. This frame offers 350g weight savings over the aluminum version

Salsa Fat Bike Geometry

The geometry used across our entire fat bike line has remained basically unchanged since developing the Beargrease Carbon back in 2012. We’ve adapted it to all our fat bike models because it works extremely well in all conditions and use cases, whether it be riding groomed singletrack at your local trail, exploring a deserted beach, or embarking across the wild frozen expanses of Alaska in the ITI race. At its core, we use the shortest chainstay possible in conjunction with a headtube angle and fork offset that place the rider’s center of gravity further over the rear wheel. This location and combination of front and rear center is key to getting a fat bike that is stable, steers well in loose conditions, and still also feels nimble and agile despite the massive wheels and tires. For 2017, all models, regardless of 4 or 5" tire size, feature 440mm or shorter chainstay lengths! A low bottom bracket height is also key, to keep the rider’s center of gravity low, and to make dabbing and dismounting easier

27.5 x 4" Wheel & Tire Size

For 2018, Beargrease rolls on the 27.5 x 4" wheel and tire size. For groomed snow or dirt, the increase in diameter provides increased rollover, a longer contact patch, and the floatation of a 5" tire without the added rolling resistance

Makwa Carbon Fork

The Makwa fork is our fat bike race fork. Lightweight and stripped of “extras”, its thru-axle design boosts stiffness and aids in solid tracking on the trail

Front Fork Wheel & Tire Options

The fork included with this frame is with the following wheel and tire combinations: 26 x 3.8–4.8" on up to a 100mm rim / 29 x 2.25–3" (including 29+) / 27.5 x 3.0–4.0"

Rear Wheel & Tire Options

Beargrease Carbon is designed for use with 26 x 4" fat bike wheels on rims up to 100mm wide. The frame is also compatible with the following wheel and tire combinations: 26 x 4.6" on up to 100mm rim (1x only) / 29 x 2.25–3" (including 29+) / 27.5 x 3.0–4.0" / NOT COMPATIBLE WITH TIRES LARGER THAN 26 x 4.6"

177 x 12mm Symmetrical Rear Spacing

Results in a strong rear wheel and frame; maintains proper chainline with crankset

1x & 2x Drivetrain Compatible

This frame is compatible with both 1x and 2x drivetrain setups. A removable direct mount front derailleur bracket allows for clean 1x build

PressFit 41 x 121mm Bottom Bracket

Compatible with all 1x and 2x fat bike-specific cranks in both GXP and 24mm spindle types, that matches up to 170/177mm rear spacing

Full-Length Housing Cable Routing

Full-length housing improves shifting performance in poor conditions and increases use time between maintenance intervals

Multiple Bottle Cages

Medium–X-Large sizes accept 2 bottle cages. Size Small accepts 1.

Warranty Information

All Salsa products are warranted against manufacturing defects in materials and workmanship from the date of retail purchase of the product, subject to the limitations detailed below.

Review Warranty Info