Thumb Operated Brake Levers

Overview:

Thumb-operated brake levers represent a specialised solution for motorcycle braking systems, enabling riders to activate the brake by pushing a lever forward with the thumb.

These controls are typically positioned just below the handlebar to facilitate comfortable and efficient operation.

Various designs are available, including articulated and adjustable levers, as well as options with differing lever lengths to accommodate individual preferences and ergonomic requirements.

While thumb-operated brake levers are most commonly mounted on handlebars, fork-mounted variants are also available for motorcycles with limited handlebar space.

It is important to note that many commercially available units were originally developed for competitive racing and may not meet the standards required for road use or MOT test compliance.

As such, thorough research and careful selection are essential to ensure that the chosen brake control is functional, safe, efficient and legally compliant for road use.

All brake controls intended for road use must comply with MOT test standards.

Ergonomics

Thumb-operated brake controls typically feature shorter operating levers than conventional systems. This necessitates increased manual effort to achieve the full engagement of the engagement.

For this reason, thumb-operated brake systems may not be suitable for people with reduced hand strength or dexterity.

It is recommended that users consider their physical constraints and conduct thorough research into their options before selecting and installing such controls.

Where possible a practical try-out is recommended prior to purchase, with due consideration being given to the prospective extent of cumulative fatigue.

Riders should ensure that the chosen lever length is appropriate for their ergonomic needs.

EXAMPLES:

Racetorx (Peterborough, UK).

Right Hand Thumb Operated Brake Lever
Right hand operation only.
Compatible with hydraulic control systems.
Optional 11mm master cylinder, suitable for motorcycles with engine capacities between 125 cc and 500 cc (e.g., supermoto, motocross, trails, and road bikes),
Optional 13mm master cylinder, suitable for motorcycles with engine capacities between 500 cc to 1400 cc (including road, track, superbike, and adventure models).
Handlebar mounted.
Mounting options are available to suit both 22 mm (7/8-inch) and 25 mm (1-inch) handlebars, ensuring compatibility with a wide range of motorcycle models.
The brake lever is actuated by applying forward pressure with the right thumb.
Operating levers offer 4 position adjustment.
9 optional lever designs available.
Levers have a knurled finish for a firm grip.
For more information on this model: https://racetorx.co.uk/product/rtx730/

Left Hand Thumb Operated Brake Lever
Left hand operation only.
Compatible with hydraulic control systems.
Optional 11mm master cylinder, suitable for motorcycles with engine capacities between 125 cc and 500 cc (e.g., supermoto, motocross, trails, and road bikes),
Optional 13mm master cylinder, suitable for motorcycles with engine capacities between 500 cc to 1400 cc (including road, track, superbike, and adventure models).
Handlebar mounted.
Mounting options are provided for both 22 mm (7/8-inch) and 25 mm (1-inch) handlebars, ensuring compatibility with a wide range of motorcycle models.
The brake lever is actuated by applying forward pressure with the left thumb.
Operating levers offer 4 position adjustment.
9 optional lever designs available.
Levers have a knurled finish for a firm grip.
Available in a choice of 4 colours.
For more information on this model: https://racetorx.co.uk/product/rtx300/

Hel Performance (Exeter, UK).

Left Hand Adjustable Rear Thumb Brake (Handlebar Mounted)
Left hand operation only.
Compatible with hydraulic control systems.
13mm Master Cylinder.
Fits 22mm (7/8-inch) handlebars only. (No 25mm (1”) handlebar option available).
The brake lever is actuated by applying forward pressure with the left thumb.
Multi-position operating lever available in a variety of lengths.
Money back guarantee if the unit fails to meet your needs.
For more information on this model: https://www.helperformance.com/hel-solid-billet-bar-mounted-adjustable-rear-thumb-brake

Left Hand Adjustable Rear Thumb Brake (Fork Mounted)
Left hand operation only.
Compatible with hydraulic control systems.
13mm Master Cylinder.
Options available to suit fork diameter from 47mm to 57mm.
The brake lever is actuated by applying forward pressure with the left thumb.
Multi-position operating lever available in a variety of lengths.
Money back guarantee if the unit fails to meet your needs.
For more information on this model: https://www.helperformance.com/hel-solid-billet-fork-mounted-adjustable-rear-thumb-brake

Other brands are available.

Conclusion:

For motorcyclists with disabilities, thumb-operated brake levers can offer a practical alternative to traditional hand levers or foot pedals.

By allowing riders to operate the brake with the thumb, these systems can accommodate a range of physical requirements and help overcome limitations associated with conventional lever designs.

When selecting a thumb-operated brake lever, it is essential to carefully consider factors such as lever length, required manual effort, and ergonomic compatibility.

Riders with reduced hand strength or dexterity should prioritise systems that minimise fatigue and allow for comfortable, reliable operation.

Where possible, practical trials and consultations with mobility specialists or experienced installers are strongly recommended to ensure the chosen solution meets individual needs.

Equally important is ensuring that any brake control system complies with road safety standards and legal requirements, particularly for motorcycles used on public roads.

Thorough research and professional advice can help ensure that the selected equipment is both safe and fully compliant.

Further Information:

Thumb brakes offer a possible solution to a range issues engendered by disabilities. Specific examples are described in a number of the disability-specific articles in the adaptations section of the NABD website: https://nabd.org.uk/adaptations/.

When it comes to motorcycling, a disability need not be a handicap!

Rick Hulse
NABD Chairman