Compare bicycles

Compare up to three published bicycles without filling gaps or guessing equivalent sizes.

Side by side

Missing information is never treated as zero. Within each group, the facts that differ come first.

TrekFuel

Fuel EX 8 2027

SpecializedEpic

Epic 9 Pro 2027

Summary

4 differences


Weight (values differ)	16.58 kg	10.39 kg
Frame material (values differ)	Aluminum	Carbon
Wheel configuration (values differ)	Different sizes	Same size
Shifting (values differ)	Mechanical	Electronic
Category	Mountain / Trail	Mountain / Trail
Suspension	Full suspension	Full suspension
Brake type	Hydraulic disc	Hydraulic disc
Electric bicycle	No	No

Frame

2 differences


Weight limit (values differ)	136 kg	Not informed
Frame (values differ)	Alpha NEXT Platinum aluminum, internal storage, ZS headset, adjustable leverage rate, guided internal routing, interchangeable alloy rocker link, interchangeable lower shock mount, downtube guard, shuttle guard, BSA 73, ISCG 05, ABP, UDH, Boost148, adaptable travel 145mm-160mm	FACT 11m Carbon, Progressive XC Race Geometry, 120mm of travel
Intended fit	Unisex	Unisex

Suspension

4 differences


Front travel (values differ)	150 mm	120 mm
Rear travel (values differ)	145 mm	120 mm
Fork (values differ)	Fox 36	RockShox SID Ultimate Flight Attendant
Rear shock (values differ)	Fox FLOAT PERFORMANCE	RockShox SIDLuxe Ultimate Flight Attendant

Drivetrain

11 differences


Smallest chainring (values differ)	30	34
Largest chainring (values differ)	30	34
Lowest gear (values differ)	16.7 in	19.0 in
Highest gear (values differ)	87.0 in	98.6 in
Bottom bracket (values differ)	SRAM	SRAM
Cassette (values differ)	SRAM XS-1270 Eagle Transmission 12 speeds XS-1270	SRAM XS-1295 Eagle Transmission 12 speeds XS-1295
Chain (values differ)	SRAM Eagle 70 Transmission Flattop 12 speeds	SRAM X0 Eagle Transmission Flattop 12 speeds
Crankset (values differ)	SRAM 30t	SRAM 34t
Rear derailleur (values differ)	SRAM Eagle 70 Transmission 12 speeds	SRAM X0 Eagle Transmission 12 speeds
Shifters (values differ)	SRAM	SRAM
Power meter (values differ)	Not informed	SRAM
Front chainrings	1	1
Rear sprockets	12	12
Smallest sprocket	10	10
Largest sprocket	52	52

Brakes

2 differences


Brakes (values differ)	SRAM DB8	SRAM Motive Silver
Disc rotors (values differ)	SRAM CenterLine	Not informed

Wheels

4 differences


Front hub (values differ)	Bontrager	Not informed
Rear hub (values differ)	Bontrager	Not informed
Rims (values differ)	Bontrager	Roval
Tires (values differ)	Bontrager	Specialized

Cockpit

6 differences


Grips (values differ)	Trek	Specialized
Handlebar (values differ)	Race Face Aeffect 35	Roval
Headset (values differ)	FSA ORBIT IS 138	Not informed
Saddle (values differ)	Ritchey Comp	Specialized
Seatpost (values differ)	Bontrager	Bike Yoke
Stem (values differ)	Bontrager	Roval
Derailleur hanger	UDH	UDH
Seatpost type	Dropper seatpost	Dropper seatpost

Other specifications

4 differences


Tire clearance (values differ)	Maximum tire width: 2.5″	Not informed
Tire width (values differ)	2.5″	2.35″
Wheel material (values differ)	Aluminum	Carbon
Wheel size (values differ)	29″ / 27.5″	29″
Bottom bracket standard	BSA	BSA
Fork spring	Air	Air

Geometry

19 differences

Reach 485mm 480

Stack 638mm 618

Wheelbase 1262mm 1223

Head angle 64.5° 65.9

Seat angle 77.4° 76.0

Trek Fuel EX 8 2027 / 19.5"
Specialized Epic 9 Pro 2027 / LG

The first bicycle is dimensioned; the others are outlined over it, aligned on the bottom bracket. Exact published values are in the table below.

Open in the geometry plotter


Published rider height (values differ)	176 cm–189 cm	178 cm–189 cm
Bottom bracket drop (values differ)	35 mm	40 mm
Bottom bracket height (values differ)	339 mm	335 mm
Chainstay length (values differ)	442 mm	438 mm
Crank length (values differ)	Not informed	170 mm
Front center (values differ)	822 mm	788 mm
Handlebar width (values differ)	Not informed	760 mm
Head tube angle (values differ)	64.5°	65.9°
Head tube length (values differ)	125 mm	120 mm
Reach (values differ)	485 mm	480 mm
Seat tube angle (values differ)	77.4°	76°
Seat tube length (values differ)	420 mm	455 mm
Stack (values differ)	638 mm	618 mm
Stack/reach ratio (values differ)	1.315	1.288
Standover height (values differ)	747 mm	757 mm
Stem length (values differ)	Not informed	70 mm
Top tube length (values differ)	617 mm	634 mm
Trail (values differ)	129 mm	120 mm
Wheelbase (values differ)	1262 mm	1223 mm
Dropper post travel	Not informed	Not informed
Front travel	Not informed	Not informed
Fork rake	44 mm	44 mm
Rear travel	Not informed	Not informed
Seatpost length	Not informed	Not informed
Stem angle	Not informed	Not informed

Published values remain authoritative

Full geometry

Gearing

Estimated speeds at a cadence, from the published gear-inch range of each bicycle.

Estimated speeds at 80 rpm

Trek Fuel EX 82027

Lowest gear: 6.4 km/h
Highest gear: 33.3 km/h

520% Total gear range

Specialized Epic 9 Pro2027

Lowest gear: 7.3 km/h
Highest gear: 37.8 km/h

520% Total gear range

Technical details

These speeds describe the gearing at the selected cadence, not how fast you can ride.
Calculated from published gear-inch values and their wheel-size assumptions.
These gearing values describe the bicycle, not a selected frame size.
A 100% range means one ratio; 500% means the highest ratio is five times the lowest.
For e-bikes, motor assistance cutoff is not represented.