Bike Rear Reflector – ABS Safety Warning Light for Bicycles

Stay Visible, Stay Safe on Every Ride

Whether you're commuting at dusk or tackling trails after dark, the Bicycle Rear Reflector is your simple, affordable solution for staying visible on the road. Made from durable ABS plastic, this compact reflector mounts easily to your seat post and bounces light directly back to drivers and other road users — giving you the confidence to ride in low-light conditions.

Made in Mainland China.

Key Features

• High Visibility: Highly reflective material returns light efficiently, making you clearly visible to vehicles from a distance — even in dark or poorly lit environments.
• Easy Installation: Fits seat posts from 27.2 mm to 31.8 mm. No tools required — simply clamp onto your seat post and you're ready to ride.
• Universal Fit: Compatible with all bike types including mountain bikes, road bikes, commuter bikes, and hybrids. Compact and lightweight — won't slow you down.
• Durable & Weather-Resistant: Constructed from high-quality ABS plastic that is waterproof, dustproof, and UV-resistant, ensuring long-lasting performance in all weather conditions.
• Multifunctional Design: Acts as both a passive reflector and a safety warning panel, improving your visibility from behind in low-light or night riding scenarios.

Specifications

• Material: ABS Plastic
• Size: 5 × 3.5 cm (1.96 × 1.37 in)
• Compatible Seat Post Diameter: 27.2 mm – 31.8 mm
• Color: As shown in images

What's in the Box?

1 or 6-pair Bicycle Rear Reflector(s) (quantity depends on option selected)

Ride Safer with These Related Accessories

Complete your cycling safety setup with these great picks from our store:

• 1.3m Spiral Cable Protector for Xiaomi M365 & Ninebot Scooter
• 1.4W Solar Bird Bath Fountain Pump – 6 Nozzles & Crash Bars

Cycling Safety Resources

For more information on bicycle safety and visibility best practices, visit the CDC Bicycle Safety page.

Learn more: Bicycle lighting

Frequently Asked Questions

Q: What seat post sizes does this bicycle reflector fit?

A: This bike rear reflector is designed to fit seat posts ranging from 27.2 mm to 31.8 mm in diameter, making it compatible with the vast majority of road bikes, mountain bikes, and commuter bicycles.

Q: Is this reflector waterproof and suitable for outdoor use?

A: Yes! The reflector is made from durable ABS plastic and is waterproof, dustproof, and UV-resistant, so it can handle rain, dust, and prolonged sun exposure without losing its reflective effectiveness.

Q: How difficult is it to install the bike rear reflector?

A: Installation is very straightforward and requires no special tools. Simply attach the reflector clamp around your seat post within the 27.2–31.8 mm diameter range and tighten it in place — the whole process takes under a minute.

Q: Can I use this reflector on any type of bike?

A: Absolutely. This reflector is designed for universal compatibility and works great on mountain bikes, road bikes, hybrid bikes, commuter bikes, and more, as long as the seat post falls within the supported diameter range.