Type	rear light
Smart lighting
Operating modes	7
Operating time	60 h
Power source	non rechargeable battery
Battery capacity	1100 mAh
Flasher dimensions	62x58x32 mm
Flasher weight	73 g
USB charging port	+
Battery indicator
Material	aluminium
Water resistance	IPX7
Shockproof
Mount	rigid
Official Website	ride.lezyne.com
Added to E-Catalog	March 2025
P/N	1-LED-41R-V137 4710582 553806

The Ai Alert technology automatically detects braking, changing the lighting mode to enhance visibility and safety.

The information in the model description is for reference purposes.
Always clarify the specifications and configuration of the product with the online store manager before purchasing.
Catalog Lezyne 2026 - new arrivals, bestsellers, and the most relevant models Lezyne.

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	Lezyne Saddle Ai Alert 250 Rear Light LEZYNE Saddle Ai Alert 250 Rear Light \| Bike LightsElevate your cycling safety to the next level with the LEZYNE Saddle Ai Al... moreert 250 Rear Light. This advanced, saddle-mounted rear light is more than just an illuminator, it´s a sophisticated safety system designed for the modern cyclist. At its core is the revolutionary Ai Alert brake sensing technology. This intelligent feature automatically detects when you decelerate, instantly changing its output to a distinct pattern that alerts traffic and fellow riders behind you, significantly reducing the risk of rear-end collisions. It´s an intuitive safety feature that works seamlessly, allowing you to focus on the road ahead.Visibility is paramount, and the Saddle Ai Alert 250 excels in all conditions. Featuring a highly disruptive 250-lumen Daytime Flash mode, this light ensures you are seen and recognized by motorists, even in the brightest daylight. Combined with Lezyne´s custom Wide Angle Optics, the light casts an impressive 270° field of visibility, eliminating side blind spots and providing comprehensive protection. With 7 versatile output modes, from a steady solid beam to multiple flashing patterns, you can perfectly tailor the light´s performance to your riding environment and duration. Modes range from a battery-sipping 5-lumen Femto mode with a 60-hour runtime to the powerful Blast mode.Built for the demands of real-world cycling, the LEZYNE Saddle Ai Alert 250 boasts a fully CNC-machined aluminum construction, offering exceptional durability and efficient heat dissipation. This robust design is rigorously tested to IPX7 waterproofing standards, guaranteeing reliable performance through torrential rain and creek crossings. The powerful 1100 mAh battery is conveniently recharged via a modern USB-C port, ensuring quick and easy power-ups. Its unique saddle rail mounting system provides a clean, integrated look while freeing up valuable seatpost space for bags or dropper posts. This is a high-performance rear light without StVZO approval, prioritizing maximum brightness and advanced flash capabilities for ultimate safety.Features:- Advanced taillight with Ai Alert brake sensing technology- Detects deceleration and changes output mode correspondingly- Highly disruptive Daytime Flash mode- 7 combined solid and flash output modes- USB-C charging- Fully CNC Aluminum Construction- Saddle mounted rear light- Rigorously tested to IPX7 Waterproofing standards- 1100 mAh battery capacitySpecifications:- Wide Angle Optics: 270° of visibility- Max. Lumens: 250 lm- Max Runtime: 60 h- Material: Composite- Waterproofness: IPX7- Connection port: USB C- Blast Mode: 60/4:00 Lumen / hh:mm- Economy Mode: 10/18:00 Lumen / hh:mm- Femto Mode: 5/60:00 Lumen / hh:mm- Day Flash Mode: 250/12:00 Lumen / hh:mm- Day Flash Mode 2: 125/24:00 Lumen / hh:mm- Flash Mode: 50/24:00 Lumen / hh:mm- Pulse Mode: 50/8:00 Lumen / hh:mm- Alert Only: 250/N.A. Lumen / hh:mmAttributes: 0-50 lm, Rear, Without StVZO Bikeinn Delivery: in United Kingdom Report	£49.99 Buy in shop

	Lezyne Saddle Ai Alert 250 Rear Light L-1-LED-41R-V137 Lezyne Saddle Ai Alert 250 Rear Light Introducing the future of cycling safety with the Lezyne Saddle Ai Alert 250 Rear Ligh... moret, a groundbreaking blend of artificial intelligence and advanced ALERT rear taillight technology. This innovative light automatically detects brake events and seamlessly switches to Active Alert Mode - a rapid 250-lumen flash "brake light" - to signal deceleration, effectively communicating your movements to traffic and fellow cyclists for enhanced visibility and safety. Featuring 10 super-bright LEDs, it delivers a powerful beam pattern designed for optimal light dispersion, even in challenging conditions. Built with durable CNC-machined aluminium and wide-angle optics for 270° of visibility, the light offers seven output modes, including the attention-grabbing 250-lumen Active Alert and Day Flash modes, and an impressive 60-hour runtime in FEMTO mode. Tested to IPX7 waterproof standards, the Saddle Ai Alert 250 Rear is engineered to perform in any weather. With a battery capacity of 1100 mAh, it’s easy to recharge - simply unscrew the light from the saddle mount to access the USB-C charging port (cable not included). Experience next-level cycling safety with the Saddle Ai Alert 250 Rear Light, featuring advanced AI technology for unmatched visibility and peace of mind on the road. Modes (Lumens/burn time): Economy - 10 / 20 hours; Blast - 80 / 4 hours; Flash 1 - 50 / 34 hours; Day Flash 1 - 250 / 15 hours; Day Flash 2 - 125 / 25 hours; Femto - 10 / 60 hours; Pulse - 50 / 8 hours; Active Alert - 250 lumens Sigmasports.com Delivery: to United Kingdom Report	£50.69 Buy in shop

	Lezyne Saddle Ai Alert 250 Rear Light L-1-LED-41R-V137 The Saddle Ai Alert 250 Rear Light uses advanced Ai Alert technology for safer cycling. It detects deceleration and automatic... moreally activates a 250-lumen brake light, enhancing visibility and communication with traffic. With 270° visibility, IPX7 waterproofing, and seven output modes, this light performs in any weather.Key Features and Benefits:Ai Alert Brake Sensing Technology: Detects when you brake and switches to a bright 250-lumen alert mode. This ensures others around you are aware of your actions, boosting safety on the road.10 Super-Bright LEDs: Emit up to 250 lumens with a wide beam pattern for maximum visibility. This helps drivers and cyclists see you from a distance, reducing the Tweekscycles.com Delivery: in United Kingdom Report	£55.00 Buy in shop

	Lezyne Saddle Ai Alert 250 Rear Light L-1-LED-41R-V137 The light automatically detects brake events and intelligently changes output mode to Active Alert - a rapid 250-lumen flash... more“brake light” mode; signaling deceleration, effectively communicating your actions to traffic and fellow cyclists, enhancing rider visibility and safety.Ai Alert lights come pre-programmed and do not collect rider data.The Saddle Ai Alert 250 Rear is a premium, highly visible saddle-mounted rear bike light combined with advanced Ai Alert technology. Equipped with 10 super-bright LEDs providing a beam pattern optimal for light dispersion in even the most challenging conditions.The fully CNC-machined aluminum construction with wide angle optics for 270° of visibility, offers 7 combined solid and flash output modes- from the eye-catching max 250 lumens emitted in both Active Alert and Day Flash modes to the impressive 60 hours of runtime in FEMTO mode. Rigorously tested to IPX7 Waterproofing standards to ensure functionality in the toughest weather conditions. The Saddle Ai Alert 250 Rear features an 1100 mAh battery capacity. Simply unscrew the light from the saddle-mounted body to easily detach for quick and easy USB-C charging accessibility (cable not included).Experience the next generation in bicycle light safety and visibility with the Saddle Ai Alert 250 Rear’s advanced Ai Alert technology. Key Features:Advanced taillight with “Ai Alert” brake-sensing technologyIntelligently detects deceleration and changes output mode alerting others you’re slowing downHighly visible saddle-mounted rear lightMax 250 lumens in Active Alert or 60-hour runtime in Femto mode7 combined solid and flash output modes including Highly disruptive Day Flash modeFully CNC machined Aluminum ConstructionWide Angle Optics provide 270° of visibilityUSB-C charging (cable not included)Rigorously tested to IPX7 Waterproofing standards1100 mAh battery capacityColor: BlackWeight: 73gSpecifications:Max Lumens: 250Max Runtime: 60 hoursBattery Capacity (mAh): 1100Recharge Type: USB-CWeight: 73gDimensions: 62.3mm, 57.6mm, 32mm (with mount)Features: IPX7, Daytime Flash, Alert Tredz.co.uk Delivery: in United Kingdom Report*	£57.99 Buy in shop

	Lezyne Al 250 Pos rear light The Lezyne Al 250 Pos rear light is an advanced bicycle safety device featuring intelligent brake detection technology. Its r... moreobust design and high visibility make it an essential accessory for cyclists seeking enhanced protection on the road.This model incorporates the innovative Ai Alert technology, which automatically detects deceleration and changes its lighting mode to warn other road users. With a maximum output of 250 lumens in Active Alert mode and up to 60 hours of battery life in Femto mode, it delivers exceptional performance. Its fully CNC-machined aluminium construction ensures durability and strength, while its wide-angle optics provide 270 degrees of visibility.Additionally, the Lezyne Al 250 Pos rear light is water-resistant with an IPX7 rating, allowing use in adverse weather conditions. Its 1100 mAh battery is easily rechargeable via USB-C, facilitating readiness for any bike ride. Deporvillage.co.uk Delivery: in United Kingdom Report	£69.28 Buy in shop

Video reviews

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11 January 20252 888 view

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Lezyne Saddle Ai Alert 250 Rear Light. will be my new light soon

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Lezyne Saddle Ai Alert 250 Rear

Buy Lezyne Saddle Ai Alert 250 Rear

Lezyne Saddle Ai Alert 250 Rear Light

Lezyne Saddle Ai Alert 250 Rear Light L-1-LED-41R-V137

Lezyne Saddle Ai Alert 250 Rear Light L-1-LED-41R-V137

Lezyne Saddle Ai Alert 250 Rear Light L-1-LED-41R-V137

Lezyne Al 250 Pos rear light