CTM Zephyr Pro 29-inch trail mountain bike — one shifter for trail rides and changing gradients:

Key features

• Wheel size: 29 in
• Frame: 6061 aluminium, 148 x 12 mm Boost rear axle, SRAM UDH hanger
• Fork: Marzocchi Bomber Z2 Air, 140 mm travel
• Drivetrain: Shimano 1 x 12, 10–51T cassette
• Brakes: Shimano BR-MT410 hydraulic / SMRT54 M rotors
• Frame sizes: Medium, Large and XL
• Seatpost: EXA Form KSP900 dropper

A choice of gears for changing gradients

The Zephyr Pro has a 32T chainring and 10–51T cassette. You can choose a gear for the gradient with one shifter, without operating a front derailleur. Keep the drivetrain adjusted and lubricated according to its instructions.

Lower the saddle for more room to move

The EXA Form KSP900 dropper lets you lower the saddle before a descent and raise it for pedalling. Check the travel for your frame size in the specification, then set the saddle height and controls to suit you.

Set the air fork for your weight

The Marzocchi Bomber Z2 Air offers 140 mm of travel. Adjust the air pressure for your weight according to the fork’s instructions, using a suitable shock pump. Follow the recommended setup and service intervals.

Check your riding position

The suggested rider height is approximately 160–175 cm for Medium, 175–185 cm for Large and 185–205 cm for XL. Compare reach, standover clearance and your preferred position with a bike you know. Height is a starting point rather than a guarantee of fit.

Tyres and rims for your trail setup

A Minion DHF front tyre is paired with a Rekon rear tyre, both with EXO protection and tubeless-ready construction. Check the rim and tyre requirements before a conversion, and use compatible tape, valves and sealant.

Choose routes within the bike’s intended use and your ability. Have it assembled and adjusted before the first ride, check it regularly and stop riding if you find damage or play.

CTM Zephyr Pro 29-inch trail mountain bike — specifications:

Sizing, weight and other details:

• Wheel size: 29 in

Frame:

• Frame: 6061 aluminium, 148 x 12 mm Boost rear axle, SRAM UDH hanger
• Frame sizes: Medium, Large and XL
• Frame model: CTM Zephyr 29
• Frame fittings: ISCG05 chain-guide mount, internal cable routing

Fork:

• Fork: Marzocchi Bomber Z2 Air, 140 mm travel
• Fork wheel size: 29 in
• Fork axle: 15 x 110 mm Boost thru-axle
• Fork spring and damping: Air

Drivetrain:

• Drivetrain: Shimano 1 x 12, 10–51T cassette
• Cassette: Shimano Deore CS-M6100-12, 10–51T
• Rear derailleur: Shimano Deore RD-M6100
• Shifter: Shimano Deore SL-M6100-IR, 12-speed

Brakes and controls:

• Brakes: Shimano BR-MT410 hydraulic / SMRT54 M rotors

Saddle and seatpost:

• Seatpost: EXA Form KSP900 dropper
• Saddle: WTB Volt, railed
• Seatpost specification: EXA Form KSP900 dropper, 100 mm travel (Small) / 125 mm (Medium) / 150 mm (Large/XL)

Handlebars:

• Bar: CTM N06, aluminium, 760 mm width, 25.4 mm (1 in) rise, 35 mm clamp

Stem:

• Stem: CTM 7729, aluminium, 40 mm

Headset:

• Headset: NECO H383, cartridge bearings

Wheels and rims:

• Rims: WTB ST Tough, 29 in, 30 mm width, TCS 2.0, 32H

Tyres:

• Front tyre: Maxxis Minion DHF, 29 x 2.50 in, EXO, tubeless ready
• Rear tyre: Maxxis Rekon, 29 x 2.40 in, EXO, tubeless ready

Cranks:

• Cranks: Shimano Deore FC-M6100-1, 32T, 170 mm

Front hub:

• Front hub: Shimano TC500, 15 x 110 mm Boost axle, cartridge bearings, 32H

Rear hub and driver:

• Rear hub: Shimano TC500-B, 12 x 148 mm Boost axle, cartridge bearings, 32H

Chain:

• Chain: Shimano CN-M6100

Pedals:

• Pedals: VP-532

Safety while riding

Riding, falls and impacts put loads through the bike and can damage components. No bike is indestructible: parts can wear out or become damaged. Check the frame, fork, bars, wheels, axles, cranks, pedals, brakes and bolted connections before every ride. Inspect the bike after a hard impact and stop riding if you find looseness, cracks or damage. Have any problem checked and repaired before riding again.

Wear a properly fitted helmet and suitable protective pads. Read our important information before buying and using a bike for assembly, servicing and riding checks.

Important information about your new bike

• Read the instructions and warranty supplied with the bike before riding.
• The bike is delivered approximately 90% assembled for shipping.
• Before the first ride, fit the pedals, saddle and handlebars, and the front wheel where required. Follow the assembly instructions and check all components.
• Have a professional bike workshop carry out a pre-ride inspection. This is a paid service; keep the receipt as proof for the manufacturer’s warranty and follow the warranty terms supplied with your bike.

The manufacturer’s warranty is separate from your statutory consumer rights. Continue to inspect and service the bike throughout its use.

Frame geometry