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 Mag

TRAINER

www.jetblackcycling.com 

info@jetblackcycling.com

ITEM CODE DESCRIPTION
JBT-13

JB Frame Bushing For Trainer - Threaded For adjustment Bolt

JBT-15B

JB Axle support cup Drive Side

JBT-15C

JB Axle support cup Non-Drive-Side

JBT-17B

JB Axle bolt With Knob And Axle Support Cup Drive Side

JBT-17C

JB Axle bolt With Knob And Axle Support Cup Non-Drive-Side

JBT-21B

JB Foot For Trainer Base - Finned Design (LH)

JBT-21C

JB Foot For Trainer Base - Finned Design (RH)

JBT-22

JB Skewer For Trainer (not Pictured)

JBT-53

JB Resistance unit assembly (M1 Mag)

JBT-69

JB Resistance unit adjustment Bolt w’ Lock nut and knob (Fluid/Mag)

M1 - TRAINER PARTS

JBT-69

JBT-53

JBT-21C

JBT-21C

JBT-21B

JBT-21B

JBT-15C

JBT-17C

JBT- 13

JBT-15B

JBT-17B

JBT- 13

4) USING YOUR TRAINER

GETTING THE BEST FROM YOUR TRAINER:

Do not ride your trainer with less than 1.5 complete turns (three half turns) of the roller 
adjustment knob after the roller first makes contact with the tyre.

 It is important that the 

tension between the tyre and the roller is set correctly every session for two reasons. (1) 
It ensures that the tyre will not slip on the roller which could cause permanent damage 
to the trainer and your tyre. (2) It ensures the resistance of your trainer is consistent for 
every training session allowing you to track performance. 
The trainer base power curves used in the JetBlack app are measured on a bike using 
700x23c slick road tyres at 110psi with exactly 1.5 complete turns (three half turns) of the 
roller adjustment knob after the roller first makes contact with the tyre. If your setup is 
different you will have a slightly different resistance, but as long as you keep the setup 
identical between each training sessions you will be able to monitor your performance.
To make your indoor workout as quiet as possible, set the trainer on a JetBlack Trainer 
Mat and use a rear tyre with a smooth tread pattern. Once attached, the bicycle slopes 
downward slightly. To level, use the optional JetBlack Riser Block under the front tyre.

CONSISTENT REPEATABLE TRAINING SESSIONS:

1.  Increasing the tension of the roller from our recommended 1.5 turns to 2 full turns 

will increase the resistance approximately 10-15%. So if you are using the trainer for 
tracking your power performance, you should resist adjusting the roller up to 2 full 
turns. 

2.  For every 20 psi your tyre deflates you will lose approximately 5% resistance. You must 

check your tyre pressure before every ride making sure it is inflated to whichever 
comes first the tyre manufacturer’s maximum recommended pressure or 110psi if your 
tyres will allow.

Changing Trainer Resistance

This trainer has five levels of resistance to help keep variety in your workout program. 
To change the level adjust the lever located on the top of the resistance unit to obtain 
the desired level. Level one offers the least resistance while level five offers the most. 
Changing gears on your bike will also have an effect on your exertion levels.

     TRAINER SPARE PARTS

1) WARNING

•  Read and follow all instructions concerning trainer setup and installation of your 

bicycle into the trainer. Failure to securely attach the bicycle to the trainer could result 
in serious injury to the rider or bystanders.

•  Remove all oils and moisture from the roller and the tyre before use.
•  Keep both hands on handlebar at all times.
•  Do not over-tighten the adjustment knobs. Over tightening may cause damage to the 

trainer or your bicycle frame. The clamp handles should be firm and secure. Do NOT 
force!

•  Regularly check your trainer, particularly the mounting system, for damage. If you think 

your trainer may be damaged, do not use it and contact your supplier.

•  Always take care when training to prevent children or pets moving close to the trainer. 

2) CAUTION

•  This trainer is intended for single-rider bicycles only.
•  Read and follow all instructions.
•  Before beginning each workout, be sure the bicycle is securely attached to the trainer.
•  Ensure you always use the trainer on a flat surface.
•  Do not put fingers, feet or dangling objects near any moving parts.
•  Do not attempt to dismount until all moving parts have come to a standstill.
•  Do not attempt to modify your JetBlack trainer.
•  Do not attempt to stop the resistance unit or flywheel manually.
•  Resistance unit can become hot enough to cause burns. Do not touch resistance unit 

during use and for some period after use, until it has had sufficient time to cool.

•  Keep children and pets away from the trainer during use.
•  Before you start any exercise program you should consult a physician. Should you 

become ill, feel dizzy, light-headed or nauseous while riding the trainer, stop riding 
immediately and seek medical attention. 

•  The roller adjustment knob must be tightened correctly to prevent damage to the 

trainer.

5) BIKE REMOVAL

Undo the roller adjustment knob on by turning it anticlockwise 1.5 turns to back the roller 
away from the tyre. Hold your bike with one hand and with the other hand undo the drive 
side adjustment knob, turning it towards your bicycle frame. Now unscrew the outer 
adjustment knob until the axle support cups are unscrewed away from the bicycle. Now 
you may carefully remove the bike forwards or upwards, until it clears the trainer frame.

6) CARING FOR YOUR TRAINER

When used according to the manufacturer’s instructions and cared for with common 
sense, your JetBlack trainer will provide a lifetime of training.
Wipe any sweat off after a workout.
Keep the machine away from any corrosive substances, such as salt or other potentially 
hazardous substances.
If the roller darkens or shows black tyre build up you may clean it off with a cloth. This 
tyre build up can be cleaned with a rag by friction rubbing the roller with a side to side 
motion. The rubbing motion with a clean rag will lift the tyre build up off the roller. Do not 
use alcohol or any cleaning solvents on the hydrogel roller. A clean cloth and friction is all 
that is required.

7) STORAGE 

Caution! The trainer will become hot during use. Keep children and pets away and allow 
trainer 15 minutes to cool down before transporting or storing your trainer.
To store or transport your trainer:
Grasp the trainer frame by the adjustment bolts/axle support cups and then lift so that you 
may fold the legs together. 
Be careful when folding the legs to avoid pinching your fingers.
Store the trainer indoors, out of the rain and away from temperature extremes.
Keep the trainer away from any corrosive substances, such as salt or other potentially 
hazardous substances.

8) WARRANTY

JetBlack offers the original owner a lifetime warranty against manufacturing defects 
manufacturing defects in materials and workmanship. Units which use batteries or 
computer display unit come with a one year warranty on these products. This warranty 
is not applicable to damage caused by misuse, abuse, neglect, accident or unauthorized 
modification. If the unit is disassembled by the consumer, this warranty is void. 
It is the responsibility of the purchaser to retain receipts for proof of purchase in the event 
that warranty is required. Returning goods to JetBlack or the place of purchase is done at 
the owner’s expense.
If you experience problems with your trainer, please email us at 
info@jetblackcycling.com

FREE JETBLACK TRAINING APP

New and exclusive to JetBlack!

Free app for iOS or Android with Multiple coaching sessions crafted by Olympic cycle 
coach Murray Healey.
•  Upload your workout to Training Peaks and Strava!
•  Test and monitor yourself with an in built Fitness/Zone test and Training Zone 

calculator

•  View: Gear Recommendations, Goal Cadence, Session Time, Session Profiles. Optional 

accessories allow upgrades to include, Speed, Cadence, Heart Rate, Power (watts) 
and Calories Burnt

www.jetblackcycling.com/app/rego_180

Use the above unique web address to 

register your details and receive an email with links for 

downloading the app on your preferred device.

DOWNLOAD YOUR

FREE JETBLACK APP

with APP

www.jetblackcycling.com

info@jetblackcycling.com

JBT-M5

 Mag

TRAINER

www.jetblackcycling.com 

info@jetblackcycling.com

ITEM CODE DESCRIPTION
JBT-13

JB Frame Bushing For Trainer - Threaded For adjustment Bolt

JBT-15B

JB Axle support cup Drive Side

JBT-15C

JB Axle support cup Non-Drive-Side

JBT-17B

JB Axle bolt With Knob And Axle Support Cup Drive Side

JBT-17C

JB Axle bolt With Knob And Axle Support Cup Non-Drive-Side

JBT-21B

JB Foot For Trainer Base - Finned Design (LH)

JBT-21C

JB Foot For Trainer Base - Finned Design (RH)

JBT-22

JB Skewer For Trainer (not Pictured)

JBT-53

JB Resistance unit assembly (M1 Mag)

JBT-69

JB Resistance unit adjustment Bolt w’ Lock nut and knob (Fluid/Mag)

M1 - TRAINER PARTS

JBT-69

JBT-53

JBT-21C

JBT-21C

JBT-21B

JBT-21B

JBT-15C

JBT-17C

JBT- 13

JBT-15B

JBT-17B

JBT- 13

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