SP Hub Dynamo SL-9 (Centerlock / QR for 16~20" Wheel)

Shutter Precision Ultraslim SL-9 Hub Dynamo - Centerlock - QR - Black

SL-9 is the world’s lightest centerlock dynamo, weighing 323g only. SP has been devoted to dynamo evolution. Further advancement has always been the goal.

From wheel size 400mm(16") to 535mm(20"):
The 9 series output perfectly matches German StVZO 6V3W/20" regulation. As can be seen from the table, from wheel size 400mm(16") to 535mm(20"), the 9 series output is designed to meet StVZO regulation.

From wheel size 646mm(26") to 716mm(28"):
According to German StVZO, it requires 3V output at a low speed of 5km/h. If the 9 series is set on wheel sizes of 646mm(26") and 716mm(28"), it offers 3V output speed at 5.8km/h and 6.4km/h respectively. To have 3V output, it only needs to slightly increase speed up to 1.4km/h. Furthermore, according to German StVZO 6V3W regulation, it requires 5.7V output at 15km/h. If we set the 9 series on wheel sizes of 646mm(26") and 716mm(28"), this 9 series offers 5.7V output when speed at 15.7km/h and 17.7 km/h respectively. To have 5.7V output, it only needs to increase speed up to 2.7km/h. As for 6V3W, the German StVZO approved hubs in the current market normally offer 6V3W output when speed around 17km/h. The SP 9 series offers 6V3W output for 646mm(26") and 716mm(28") wheels when speed at 16.7km/h and 18.6km/h respectively.

To sum up, the 9 series with unprecedented dynamo characteristics is the perfect devise for 16" to 20" wheels. The extra values provided by the 9 series, such as its light weight and low drag, are definitely the great advantages for enjoying comfort. The ULTRASLIM dynamo can also work greatly for 26" to 28" wheel. Does increasing speed only 1 or 2 km/h matter? Only piece of cake. SP 9 series offers sufficient output and is definitely the best setup for going fast.

Shutter Precision hubs dynamos bring safety, convenience, comfort and the highest performance for riders. SP hub dynamos represent the best combination of technical achievements to meet the fundamental demands of a hub dynamo i.e. light weight, small size and high efficiency. The 9 series has demonstrated an enormous improvement from the preceding series. Innovation is all about self-breakthrough.

Two years warranty from date of purchase. 

For more information on SP warranty, please refer to https://www.sp-dynamo.com/service.

Made in Taiwan.