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THE PHOTO IS REPRESENTATIVE PLEASE SEE SPEC SHEET FOR DEFINITE DIMENSIONS
* Quick release is not included.
The new SP PD/L-8X sets an entirely new standard for hub dynamos. It is more efficient, technologically advanced and simpler than competing hub dynamos while also being 40 grams lighter in weight than any QR15 hub dynamo available. Current tests show the PD-8X to have achieved a new record-breaking efficiency of 78 percent (i.e. watts of mechanical energy converted directly in watts of electrical energy - minus wasted muscular effort that would otherwise be propelling rider and bicycle forward), ranking it above the SP 8 series hub dynamos which previously ranked highest in efficiency at 72 percent.
SP 8 Series hub dynamos
SP hub dynamos are unrivalled in every sense of the word. They are more efficient, technologically advanced, simpler and lighter in weight than any competing hub dynamo by class. When lights are on, the P-8 (3W) and S-8 (3W for 20" and 2.4W for 700c) hub dynamos achieve an incomparable efficiency of 72 percent (i.e. watts of mechanical energy converted directly in watts of electrical energy - minus wasted muscular effort that would otherwise be propelling rider and bicycle forward). Before the introduction of the PD-8X in 2013, SP's 8 series hub dynamos were the most efficient available on the global market. To our knowledge, they remain the most efficient in the world - except for the PD-8X. SP's P-8 and S-8 series hub dynamos are respectively 7 and 17 percent more efficient than top German and Japanese rivals when measured at 15 km/h (9.3 mph), the "gold standard" specification set under the rigorous German StVZO standard for hub dynamos. (See P-8 and S-8 Efficiency graphs in pictures.)
Perhaps more significant is the fact that the 8 Series hub dynamos have dramatically less drag when lights are off in comparison to the same top-of-the-line Japanese and even German hub dynamos. At 30 km/h (18.6 mph), the P and S series hub dynamos generate well over 50 percent less drag than the nearest Japanese rival and nearly 25 percent less drag than the most efficient German counterpart. Notably, they produce less total drag in comparison to competing hub dynamos at all speeds tested while also producing more power! Moreover, this efficiency gap widens considerably at speeds above 20 km/h.
In terms of weight, the rim brake versions of the P-8 and S-8 series hub dynamos are a full 63 and 10 grams lighter than their nearest contenders, thus making the SV-8 not only the most efficient, but also the lightest hub dynamo on the planet. The disc brake versions are similarly at the top of their class in terms of lightness of weight.
To the best of our knowledge here at Intelligent Design Cycles, SP hub dynamos are today peerless in the world bar none.
* Please note that for the PD-8 disc-brake version of SP hub dynamos (and not the PV-8) version, the flange diameters are asymmetric (see spec sheet in pictures). The spoke PCDs are 52mm & 58mm (disc side) and the flange diameters are 60mm and 66mm (disc side).
* Owners of bicycles with 20" wheels. We recommend the P series hub dynamos even for 20" wheels as they will produce more power/light at lower speeds. The risk of burning out lamps is unlikely as modern dynamo LED lights have in-built voltage limiters. I run a PD-8 on my Bike Friday without problems and can hardly notice the additional drag. If you plan to recharge electronic devices, the extra power is a key benefit available only to 20" wheel bicycle owners.
* Please feel free to write if you are interested in additional specifications.
* FREE SHIPPING by first class post anywhere in North America, Western Europe (customers in Italy and Spain are requested to provide daytime phone numbers to ensure delivery) and East Asia. For other countries please inquire.
* Please note the seller is not responsible for any costs associated with import or domestic taxation in the destination country. Our experience is that US customers have not been assessed import charges for private purchases such as these. If you are assessed, please let us know so we can advise future customers.
The Shutter Precision Two Year Warranty
All SP hub dynamos come with a full two-year limited warranty against manufacturer defect beginning from the date of purchase. SP stands behind their products and will repair or replace free of charge products found to be defective. High-mileage users are particularly valued customers and hubs that have not suffered a defect, but simply have worn bearings due to extensive use, can be sent back to the manufacturer for new bearings free of charge within the two year warranty period (customer pays for two way postage). Similar service after the warranty period is available for a reasonable USD 30.00 (the amount includes the return postage). This is the best service policy we are aware of in the industry. Please note that SP hub dynamos are not user serviceable.
Intelligent Design Cycles proud to be an agent for SP hub dynamos. With the exception of EU member countries, Intelligent Design Cycles is an authorised agent for SP products worldwide and is the exclusive distributor for SP products in Australia. In short, dealer inquiries are warmly invited.