CTM Zephyr Comp Junior 26" is a trail-ready junior MTB bike with 130 mm suspension, built for young riders who want to push their skills further

MTB Bike – Key Features:

• Frame: CTM Zephyr 26" Aluminium 6061-T6
• Fork: Suntour XCM34 Boost with 130 mm travel
• Drivetrain: Shimano CUES 1x9
• Brakes: Shimano MT200 hydraulic disc brakes
• Wheelset: 26" WTB SX25 rims
• Tyres: WTB Trail Boss 26" x 2.25"
• Frame features: Boost 148 mm rear axle with SRAM UDH hanger
• Built for: Trail riding, forest tracks and everyday MTB adventures

A trail mountain bike designed for ambitious young riders

The CTM Zephyr Comp Junior 26" gives younger riders the opportunity to experience a real trail mountain bike built with modern geometry and reliable components. It is designed for those who are ready to move beyond beginner trails and develop their riding skills with confidence.

Whether riding forest singletrack, flowing trails or local bike parks, the Zephyr Comp Junior delivers stability, control and plenty of fun. Its lightweight aluminium frame and carefully selected components provide the perfect balance between durability and performance.

Why choose the CTM Zephyr Comp Junior?

The Zephyr Comp Junior is much more than a typical kids' mountain bike. Its modern aluminium frame features a Boost 148 mm rear axle, SRAM UDH derailleur hanger, ISCG05 chain guide mount and internal cable routing. These features are usually found on full-size trail bikes, giving young riders equipment they can continue progressing with.

The 130 mm suspension fork smooths out roots, rocks and rough terrain, while the Shimano CUES drivetrain delivers reliable shifting and Shimano hydraulic brakes provide confident stopping power in all conditions.

Who is this bike for?

The CTM Zephyr Comp Junior is ideal for young mountain bikers who want to improve their skills on technical trails, woodland tracks and flowing singletrack. It is equally suited to family rides, trail centres and first visits to bike parks.

If your young rider is ready for a capable mountain bike that encourages confidence and progression, the Zephyr Comp Junior is an excellent choice.

Frame size guide

• Size S: Recommended rider height approximately 155–165 cm
• Size M: Recommended rider height approximately 165–175 cm

Choosing the correct frame size improves comfort, handling and overall confidence on the trail. A properly fitted bike helps young riders stay in control and enjoy every ride while continuing to build their skills.

Modern frame built to grow with the rider

The 6061-T6 aluminium frame combines low weight with excellent durability. Boost rear spacing improves wheel stiffness, the SRAM UDH hanger makes replacement simple if needed, while the ISCG05 mount allows future installation of a chain guide.

Internal cable routing keeps the bike looking clean while protecting cables from dirt, mud and damage during off-road riding.

Suntour XCM34 Boost suspension fork with 130 mm travel

The Suntour XCM34 Boost fork offers 130 mm of travel to absorb bumps, roots and rocky sections with confidence. Its Boost thru axle improves steering precision and front-end stiffness, helping the bike stay composed on technical terrain.

With capable suspension and progressive trail geometry, the Zephyr Comp Junior gives young riders the confidence to ride further, tackle more challenging trails and continue improving every time they head off-road.

Shimano CUES 1x9 drivetrain built for trail riding

The CTM Zephyr Comp Junior features a Shimano CUES 1x9 drivetrain paired with an 11-46T cassette, giving young riders a wide gear range for steep climbs and fast sections. Smooth and reliable shifting allows riders to focus on improving their skills instead of worrying about the bike.

A single chainring setup is simple to use, requires less maintenance and is ideal for modern trail riding. With fewer moving parts, it also improves reliability on rough terrain.

Shimano hydraulic disc brakes for confident control

Shimano MT200 hydraulic disc brakes provide smooth modulation and dependable stopping power in both dry and wet conditions. They help young riders stay in control on steep descents, technical trails and everyday off-road adventures.

Trail-ready wheels and tyres

WTB SX25 rims combined with WTB Trail Boss 26" x 2.25" tyres deliver excellent grip, stability and predictable handling on forest trails, gravel roads and flowing singletrack. This setup gives young riders the confidence to explore more demanding terrain.

Ride protected

Every trail ride is more enjoyable when you're properly protected. Before heading out, choose a quality MTB helmet and protective gear for added confidence and safety.

CTM Zephyr Comp Junior 26" specifications

• Frame: CTM Zephyr 26" | Aluminium 6061-T6 | 12 x 148 mm Boost axle | SRAM UDH derailleur hanger | ISCG05 chain guide mount | internal cable routing | full geometry below
• Fork: Suntour XCM34 Boost | 27.5" | travel: 130 mm | 15 x 110 mm Boost thru axle
• Handlebar: CTM N04 | aluminium | width: 740 mm | diameter: 31.8 mm
• Stem: CTM 7140 | aluminium
• Headset: NECO H156 | sealed bearings
• Rims: WTB SX25 | 26" | 32H
• Tyres: WTB Trail Boss | 26" x 2.25"
• Crankset: Shimano FC-UT400 | 32T | 165 mm
• Bottom Bracket: Shimano BB
• Front Hub: Shimano TC500 | sealed bearings | 32H | 15x110 mm Boost thru axle
• Rear Hub: Shimano TC500-B | sealed bearings | 32H | 12x148 mm Boost thru axle
• Cassette: Shimano CUES CS-LG300 | 9-speed | 11-46T
• Rear Derailleur: Shimano CUES RD-U4000
• Shifter: Shimano CUES SL-U4000 | 9-speed
• Brakes: Shimano MT200 / SMRT10 | hydraulic
• Chain: KMC XGLIDE
• Saddle: CTM Cloud M
• Seatpost: CTM LCSP | length: 350 mm | diameter: 31.6 mm
• Pedals: VPE 537
• Weight: 14 kg

Frame Geometry CTM Zephyr Junior 

All dimensions are provided by the manufacturer and may vary slightly due to the production process.

FAQ

Please remember that this bike, like all performance bicycles, is exposed to significant loads during riding. Performance bikes are not indestructible, and every component can become damaged or worn during use. Regular servicing and routine inspections will help keep your bike safe and extend its lifespan.

Important information about your new bike

• Read the warranty documentation supplied with your bike before your first ride.
• Bikes ordered online are delivered approximately 90% assembled for safe transportation.
• Before riding, install the pedals, align and tighten the handlebars, and on some models fit the front wheel.
• The manufacturer recommends a pre-delivery inspection, often called the first service or zero service, at a professional bicycle workshop. This service is chargeable and is required to keep the manufacturer's warranty valid. Keep your service receipt.