Quiver

2015 Specialized Fatboy SL vs 2013 Salsa Beargrease

The Salsa Beargrease size closest to your M is the M. Compare the M instead

What changes on the Salsa Beargrease

Compared with the Specialized Fatboy SL in M, the Salsa Beargrease in S places the top of the head tube 8 mm lower and 15 mm further back, relative to the bottom bracket.

Frame stack
−8 mm
Lower front end
Frame reach
−16 mm
Shorter frame reach
Wheelbase
n/a
One of the bikes has no number for this
Head angle
−1.0°
Slacker: calmer steering
Chainstays
±0 mm
About the same

The two frames

2015 Specialized Fatboy SL (M)The Specialized Fatboy SL frame drawn to scale.J 1105

Only the Specialized Fatboy SL is drawn. The Salsa Beargrease numbers we have for size S are missing the wheelbase.

Geometry side by side

MeasurementSpecialized Fatboy SL MSalsa Beargrease SDifference
Reach420mm404.5−16 mm
Stack600mm592.4−8 mm
Head tube angle70.5°69.5−1.0°
Seat tube angle73°73.5+0.5°
Effective top tube603mm580−23 mm
Chainstay length455mm455±0 mm
Wheelbase1105mmnot listed
BB drop60mm63+3 mm
BB height315mmnot listed
Standover793mm704.4−89 mm
Seat tube length445mm432−13 mm
Head tube length120mm130+10 mm
Fork lengthnot listed468

Differences are the Salsa Beargrease minus the Specialized Fatboy SL. Full charts: 2015 Specialized Fatboy SL, 2013 Salsa Beargrease.

Where each sits in its class

Specialized Fatboy SLSalsa Beargrease

AggressivePositionUpright
CalmSteeringQuick
PlayfulBalancePlanted

Each bike is ranked against the other fat bikes on Quiver, on frame geometry alone. Not your hand position or ride feel.

What each ships with

The stock build of each bike's first listed trim. Parts that match are dimmed.

PartSpecialized Fatboy SLSLSalsa Beargrease
ShifterSRAM XX1not listed
DerailleurSRAM XX1not listed
CassetteSRAM XX1not listed
ChainKMC X11Lnot listed
CranksetRace Face Next SLnot listed
TireSpecialized Ground Control Fatnot listed
HubSpecialized Stout XC 135, Specialized Stout XC 190not listed
RimHed Big Dealnot listed
BrakeMagura MT8not listed
StemSpecialized Stout XCnot listed
GripsSpecialized Sip Gripnot listed
SaddleSpecialized Phenom Expertnot listed

Know what is on every bike.

Add your bike to Quiver. Keep its parts, setup, and service history together, then share your build.

Explore the app
A Transition Relay build sheet: frame, fork, shock and drivetrainThe Relay’s ride photo galleryThe Relay’s ride spectrum and 2D frame geometryThe garage: five bikes and 99 recorded partsA Specialized Tarmac SL8 road build sheet