Patented seatpost with an integrated seat rail clamp. The seatpost tube features 5 holes in which the LEDs are enclosed.
A cable with two open ends extends out of the lower end of the seatpost tube for connection to the bicycle dynamo.
27.2 / 30.9 / 31.6㎜
D30.9, 350 / 400㎜
D31.6, 350 / 400㎜
Color and surface finish
Polished Silver, Matt Black
2 bolt clamp, offset 9㎜, mechanical stop
Aluminum 6061 T6
5 LEDs with integrated electrical light control and battery management system. The two upper LEDs are protruding, also ensuring the lateral emission of light. The lower 3 LEDs are sunk into the seat post tube. The LEDs, circuit board are enclosed in a plastic housing and are thus protected (dust and splash proof in accordance with IPX5).
2 wide angle red LEDs, 3 high brightness red LEDs
The bicycle dynamo hub with alternating current (AC)
Nominal voltage: 6V (3W)
A Zener diode prevents damage to the electronics or the LEDs from voltage surges.
The rear light may also be powered by the dynamo if no headlight is connected in parallel to consume power.
Seatpost test standard
standard or directive
RoHS, StVZO §22a TA Nr.23
(Rear lights for bicycles), IPX5
Rear light seatpost
Use the correct diameter corresponding to your bicycle frame.
Use the appropriate tool to fasten the saddle support.
Adhere to the safety lines of the minimum and maximum insertion heights.
The rear light may only be operated in the following angular range: Max 76˚, Min 70˚.
The lower two LEDs may be sunk in the frame. Always pay attention to the mechanical stopper of the maximum insertion depth!
The rear light must be mounted in such a way that it is illuminated at the rear. The reference axis (see drawing) must be aligned parallel to the bicycle‘s longitudinal axis.
The two lower LEDs may be inserted into the frame. The minimum insertion length into the frame is 100mm. The rear light must be aligned so that it shines backward. The reference axis (see drawing) must be aligned with the longitudinal axis of the bicycle. A mechanical stopper prevents the insertion of the seatpost to cover the 3rd LED(from the bottom) and damage to the two top protruding LEDs.
Angle limits (Frame seat tube)
Connecting to the power source
The connector of built-in light seatpost and the connector of power source should be compatible, which must be ascertained before the purchase of the product.
The rear light is not equipped with a switch and is therefore on, as long as the dynamo is connected.
If the rear light is connected to the rear light output of a headlight, it is switched on and off via the headlight switch.
If the rear light is operated independently of a headlight via the dynamo, the headlight must be switched on separately.
At startup, the product must be dry. Remove any moisture before riding. After installation, test that the seatpost does not drop under load. Take care that the LEDs are not covered by a bag or clothing when riding. Do not make any independent changes to the product. Do not try to open the product.
Steps to take in
the event of a failure
If either LED no. 4 or no. 5 is defective, the mode must be switched to the 3 LED mode to conform with the regulation. Repair or replacement is nevertheless recommended. If LED no. 1, no. 2 or no. 3 fails, the seat post must in any case be sent to the importer for repair or replacement.
In the case of failure of any of the 5 LEDs, the seat post must be sent to the importer for repair or replacement.
Min: -15° C
Max: 45° C
Optimum storage temperature: 20-25°C
Please be aware before order. The import tax will be charged to you separately. Taxes may vary depending on the country. If you want to return or exchange, you will be charged a Fedex round-trip shipping fee. Prices are inclusive of basic international shipping. Regions where additional shipping fee are generated will be charged at the payment window.
Please send us unused products by prepaid, will refund you after confirming arrival.
Please send us unused items by prepaid, and send $25~$35 re-delivery courier fee depending on your location. After receipt the goods and courier fee, we will replace it with another product.
Seatpost and light module: 2 years from the date of purchase.
In case of warranty, (replacement or repair), please contact the distributor through whom the product was purchased.
The product packaging is made of recyclable materials.
Dispose of these environmentally friendly in the provided collection containers.
Old appliances and batteries must not be disposed of with normal household waste.
According to EU Directive 2012/19/EU, the product must be disposed of properly at the end of its service life. Return the old device to a collection point for electronic waste or a recycling center.
The LEDs are numbered from top to bottom
If LED numbers 4 or 5, or 4 and 5 are defective, it is permissible to switch to the 3-LED mode, which complies with the approval. A repair or replacement is still recommended.
If LED numbers 1, 2 or 3 are defective, the seatpost must be sent to the importer for repair or completely replaced.