CTM Zephyr Xpert 27.5"

2021 MountainTrail Manufacturer page

Fork travel: 130 mm
Wheels: 27.5″
Drivetrain: 1 × 11 32t / 11–51t
Gear range: 464%
Weight: 13.7 kg 30.2 lb · Reference configuration not specified
Frame: Aluminum
Brakes: Hydraulic disc

Rider height by size (cm)

Size guide

SM 158–171
MD 168–180
LG 178–189
XL 186–199

Components

15 of 21 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

Aluminum Not identified

Suspension

2 parts

Fork
- SR Suntour XCR34
Rear shock

None

Drivetrain

8 parts

Bottom bracket
- Shimano
Cassette
- Shimano Deore CS-M5100-11 11 speeds
CS-M5100-11
Chain
- KMC X11 11 speeds
Chain guide

Upper slider Not identified
Crankset
- Shimano Deore FC-M5100 11 speeds
FC-M5100
Front derailleur

None
Rear derailleur
- Shimano Deore RD-M5100 11 speeds
RD-M5100
Shifters
- Shimano Deore SL-M5100
SL-M5100

Brakes

2 parts

Brake levers
- Shimano BL-MT400
BL-MT400
Brakes
- Shimano BR-MT400
BR-MT400

Wheels and tires

4 parts

Cockpit and contact points

6 parts

Handlebar

CTM HB-RB12, 31.8mm clamp diameter, 760mm width, 9° rise Not identified

HB-RB12
Headset
- Neco
Pedals
- VP VPE-527 E-Bike pedal
VPE-527
Saddle

CTM Not identified
Seatpost

EXA Form KSP900 dropper, Drop: 100mm (SM), 125mm (MD), 150mm (LG/XL) Not identified
Stem

CTM LCS, 31.8mm bar clamp, 50mm length Not identified

Sizes and geometry

4 sizes Open in the geometry plotter

Enter your height to highlight matching ranges.

Size MD

Table

Geometry diagram unavailable

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

Size Reported by the manufacturer

Complete manufacturer geometry table 4 published sizes

Complete manufacturer geometry by size
Measurement
Reachmm	400	420	445	470
Stackmm	608	616	622	626
Top tube lengthmm	578	601	628	654
Seat tube lengthmm	400	430	475	510
Head tube lengthmm	100	110	115	120
Head tube angle	67°	67°	67°	67°
Seat tube angle	70°	70°	70°	70°
Chainstay lengthmm	425	425	425	425
Bottom bracket dropmm	48	48	48	48
Bottom bracket heightmm	307	307	307	307
Stack/reach ratio	1.52	1.47	1.40	1.33

Not published by the manufacturer: Wheelbase, Front center, Standover height, Fork rake, Trail, 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: Aluminum
Bicycle weight: 13.7 kg

30.2 lb

Suspension

Suspension configuration: Hardtail
Front travel: 130 mm

Drivetrain

Derived by Bikelake

Front chainrings: 1
Smallest chainring: 32
Largest chainring: 32
Rear sprockets: 11
Smallest sprocket: 11
Largest sprocket: 51
Lowest gear: 17.3 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: 2.4″
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

130 mm

This value is within the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,324 bicycles with this information
Coverage: 98.1% of the class

Lowest gear

17.3 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,137 bicycles with this information
Coverage: 84.2% of the class

Highest gear

80.0 gear inches

This value is below the central range for this class.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,137 bicycles with this information
Coverage: 84.2% of the class

Shifting

Mechanical

53 of 1,346 bicycles with this information use electronic shifting.

Cohort: Mountain / Trail Model year: 2021
Sample: 1,346 bicycles with this information
Coverage: 99.7% of the class

Gearing

Estimated speeds at 80 rpm

Lowest gear: 6.6 km/h
Highest gear: 30.6 km/h

Total gear range 464%

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: 17.3–80.0 gear inches
Class reference (p10–p90): 16.9–98.6 gear inches; The band runs from p10 for the lowest gear to p90 for the highest gear.

Cohort: Mountain / Trail Model year: 2021
Lowest gear: 1137 bicycles with this information, 84.2% of the class
Highest gear: 1137 bicycles with this information, 84.2% 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 2021 builds

Differences across 2021 builds
Specification	This bicycle CTM Zephyr Xpert 27.5"	CTM Zephyr Pro 27.5"	CTM Zephyr Pro 29"	CTM Zephyr Xpert 29"
Frame
Bicycle weight	13.7 kg	13.9 kg	14.2 kg	14.2 kg
Drivetrain
Rear sprockets	11	12	12	11
Largest sprocket	51	50	50	51
Lowest gear	17.3 in	17.6 in	18.6 in	18.2 in
Highest gear	80.0 in	80.0 in	84.4 in	84.4 in
Other specifications
Wheel size	27.5″	27.5″	29″	29″