Diamondback Release 4C

Name: Diamondback Release 4C
Brand: Diamondback

2025 MountainTrail Manufacturer page

Last known price: $4,750

Prices shown first for United States
Travel: 140 / 130 mm Fork / rear shock
Wheels: 27.5″
Drivetrain: 1 × 12 32t / 11–50t
Gear range: 455%
Frame: Carbon
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 162.6–172
MD 169–179
LG 176–189
XL 187–198.1

Components

19 of 23 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

Carbon Release 27.5, Monocoque Carbon Front and Rear Triangle, 130mm Travel, Level Link Suspension Platform, Euro Standard Threaded BB, ISCG-05 Tabs, Boost 148x12mm Maxle Drop Out, 1.5" Tapered Headtube, Post Mount Disc Tabs Not identified

ISCG-05

Suspension

2 parts

Drivetrain

7 parts

Brakes

2 parts

Wheels and tires

5 parts

Front hub
- Novatec
Rear hub
- Novatec
Rims
- Diamondback
Spokes

14g Stainless Steel Not identified
Tires
- Maxxis Minion

Cockpit and contact points

7 parts

Grips
- Ergon
Handlebar

DB35 Aluminum 780mm Wide, 15mm Rise, 35mm Bar Bore Not identified
Headset
- FSA
Pedals

DB CNC Platform, Sealed Cartidge Bearing w/Replaceable Pins Not identified
Saddle
- WTB Volt
Seatpost
- KS
Stem
- Factor

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Reach 427mm

Stack 599mm

Wheelbase 1159mm

Head angle 67.7°

Seat angle 73.0°

Every size is drawn to the same scale, in millimeters. Explanatory schematic on an assumed 27.5″ wheel; exact published values are in the table below.

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Frame
Reachmm	402	427	449	472
Stackmm	599	599	608	617
Top tube lengthmm	585	610	635	660
Seat tube lengthmm	394	432	483	533
Head tube lengthmm	100	100	110	120
Head tube angle	67.7°	67.7°	67.7°	67.7°
Seat tube angle	73°	73°	73°	73°
Chainstay lengthmm	446	446	446	446
Wheelbasemm	1134	1159	1185	1211
Front centermm	689	714	740	766
Bottom bracket dropmm	25	25	25	25
Bottom bracket heightmm	348	348	348	348
Standover heightmm	775	784	791	804
Fork rakemm	47	47	48	47
Trailmm	95	95	94	95
Stack/reach ratio	1.49	1.40	1.35	1.31
Suspension and parts
Front travelmm	140	140	140	140
Crank lengthmm	170	175	175	175
Handlebar widthmm	780	780	780	780
Stem lengthmm	40	40	40	40
Seatpost lengthmm	435	435	485	485

Not published by the manufacturer: Rear travel, Stem angle and Dropper post travel.

Specifications

Frame and fork

Intended fit: Unisex
Frame material: Carbon

Suspension

Suspension configuration: Full suspension
Front travel: 140 mm
Rear travel: 130 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 12
Smallest sprocket: 11
Largest sprocket: 50
Lowest gear: 17.6 in
Highest gear: 80.0 in

Wheels and brakes

Wheel configuration: Same size
Brake type: Hydraulic disc

Fit and controls

Seatpost: Dropper seatpost
Shifting: Mechanical

Additional specifications

Bottom bracket standard: BSA
Fork spring: Air
Tire width: 2.3″
Wheel material: Aluminum
Wheel size: 27.5″

Technical analysis

4 measures

How these figures sit among bicycles of the same class and model year. Context, not a ranking.

Front travel

140 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,810 bicycles with this information
Coverage: 97.5% of the class

Lowest gear

17.6 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,384 bicycles with this information
Coverage: 74.6% of the class

Highest gear

80.0 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,384 bicycles with this information
Coverage: 74.6% of the class

Shifting

Mechanical

388 of 1,849 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2025
Sample: 1,849 bicycles with this information
Coverage: 99.6% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.7 km/h
Highest gear: 30.6 km/h

Total gear range 455%

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: 17.6–80.0 gear inches
Class reference (p10–p90): 17.1–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2025
Lowest gear: 1384 bicycles with this information, 74.6% of the class
Highest gear: 1384 bicycles with this information, 74.6% of the class

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 2025 builds
Specification	This bicycle Diamondback Release 4C	Diamondback Release 29 1	Diamondback Release 29 2	Diamondback Release 29 3	Diamondback Release 5C
Frame
Frame material	Carbon	Aluminum	Aluminum	Aluminum	Carbon
Drivetrain
Smallest sprocket	11	11	11	10	10
Lowest gear	17.6 in	18.6 in	18.6 in	18.6 in	17.6 in
Highest gear	80.0 in	84.4 in	84.4 in	92.8 in	88.0 in
Other specifications
Bottom bracket standard	BSA	Not informed	Not informed	Not informed	BSA
Fork spring	Air	Not informed	Air	Air	Air
Tire width	2.3″	2.3″	2.3″	2.3″	2.4″
Wheel size	27.5″	29″	29″	29″	27.5″