Specialized Fuse 4

2010 BMX Manufacturer page

Suspension: Rigid
Wheels: 20″
Drivetrain: 1 × 1 28t / 10t
Gear range: 100%
Frame: Steel
Brakes: Rim brake

Sizes

Size guide

16"
20.5"
19"
20"
21"

The manufacturer did not publish rider heights for these sizes.

Components

6 of 20 identified

Parts found in a manufacturer catalog show their brand, model and key numbers, and the steps show how precisely they are identified: brand, series, model, or the exact product. The info button has every detail and the text the manufacturer published.

Frame and fork

1 part

Frame

100% Cr-Mo, 21"" TT, MID BB shell, tig welded, double-butted and formed DT/TT/ST, externally relieved integrated HT w/ stamped ""S"" logo, gusseted BB yoke, seat-stay mounted U-brake bosses, integrated seat collar, 3D dropouts for 14mm axle w/ integrated axle tensioners Not identified

Suspension

1 part

Fork

Full Cr-Mo, 1-1/8"" threadless for integrated headset, heat treated Cr-Mo 1pc. CNC steerer, butted 1.8-1.2mm Cr-Mo 1-1/4"" blades, 5mm HT Cr-Mo dropouts for 14mm axle w/ gussets Not identified

Drivetrain

4 parts

Bottom bracket

Mid BB, 2x cartridge bearing, alloy cone spacers w/ 19mm spindle Not identified
Cassette

Joy Tech, 1/2"" x 1/8"" x 10t Cr-Mo, cog driver integrated w/ rear hub Not identified
Chain
- KMC
K-710
Crankset

Fuse SL 2pc. 175mm length, tig welded and heat treated Sanko Cr-Mo arms, hollow 19mm x 152mm 8-spline spindle Not identified

Brakes

2 parts

Brake levers
- Tektro
Brakes
- Tektro
FX-15

Wheels and tires

5 parts

Front hub

Fuse SL, 36h, 2x sealed cartridge bearing, mid flange, hollow 14mm axle Not identified
Rear hub

Fuse SL, 36h, cassette w/ 10t cog driver, 4x sealed cartridge bearing, mid flange, 14mm hollow axle Not identified
Rims

Fuse SL, double wall w/ eyelets Not identified
Spokes

2mm (14g) stainless Not identified
Tires
- Specialized

Cockpit and contact points

7 parts

Grips

Fuse Locking Grip, inner clamp on style, Kraton surface, alloy bar ends Not identified
Handlebar

Cr-Mo 2pc. 675mm wide, 205mm rise, 12 degree back, 3 degree up sweep Not identified
Headset
- FSA
Pedals
- Specialized
Saddle

Fuse SL, super light foam, hollow 8mm Cr-Mo rail w/ rail brace tube Not identified
Seatpost

Alloy, 2 bolt, no offset, 25.4mm Not identified
Stem

Fuse SL, forged alloy, 2pc. moto-style clamp, top load, 50mm extension, 1-1/8"" A-Head Not identified

Sizes and geometry

5 sizes Open in the geometry plotter

Complete rider-height ranges are not published for these sizes. You can still explore the geometry below.

Size 19"

Table

Geometry diagram unavailable

The drawing needs wheelbase, reach and stack, which the manufacturer did not publish. Available facts remain in the table.

Size

Complete manufacturer geometry table 5 published sizes

Complete manufacturer geometry by size
Measurement
Seat tube lengthmm	207	242	238	255	239
Head tube lengthmm	100	100	100	110	110
Head tube angle	73°	74.25°	74.25°	74.25°	74.25°
Seat tube angle	70°	72°	72°	72°	72°
Chainstay lengthmm	299	349	347	352	347
Bottom bracket heightmm	238	279	279	283	279
Standover heightmm	474	573	561	570	560
Fork rakemm	29	29	29	29	29

Not published by the manufacturer: Reach, Stack, Top tube length, Wheelbase, Front center, Bottom bracket drop, Trail, Stack/reach ratio, Front travel, Rear travel, Crank length, Handlebar width, Stem length, Stem angle, Seatpost length and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Steel
Fork material: Steel

Suspension

Suspension configuration: Rigid

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 28
Largest chainring: 28
Rear sprockets: 1
Smallest sprocket: 10
Largest sprocket: 10
Lowest gear: 56.0 in
Highest gear: 56.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Rim brake

Fit and controls

Seatpost: Rigid seatpost
Shifting: No shifting

Additional specifications

Tire width: 2.1″
Wheel material: Aluminum
Wheel size: 20″

Gearing

Estimated speeds at 80 rpm

Lowest gear: 21.4 km/h
Highest gear: 21.4 km/h

Total gear range 100%

Technical details and class reference

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.

Gear-inch range

Lower gear-inch values travel less distance per pedal revolution; higher values travel farther.

This bicycle: 56.0–56.0 gear inches

Lineup changes

The published facts that differ across this family's builds and from the same model a year earlier. Missing information never counts as zero.

Differences across 2010 builds

Differences across 2010 builds
Specification	This bicycle Specialized Fuse 4	Specialized Fuse 1	Specialized Fuse 16	Specialized Fuse 2	Specialized Fuse 3	Specialized Fuse Grom 20
Drivetrain
Smallest chainring	28	36	30	36	28	36
Largest chainring	28	36	30	36	28	36
Smallest sprocket	10	13	13	13	13	13
Largest sprocket	10	13	13	13	13	13
Lowest gear	56.0 in	55.4 in	46.2 in	55.4 in	43.1 in	55.4 in
Highest gear	56.0 in	55.4 in	46.2 in	55.4 in	43.1 in	55.4 in
Other specifications
Tire width	2.1″	2.1″	2″	2.1″	2.1″	2.1″
Bottom bracket standard	Not informed	BSA	BSA	BSA	Not informed	Not informed