Hello, can i mount these hub on my mountain bike, i do a lot of cross country riding, fire roads, trails. how will it handle to rough terrain?

It should work fine for trail riding. We have three mountain bikes with Shimano dynamo hubs, and though most of our riding is in the city, they continue to perform well. The oldest two we have had for six years, using them year round in rain, mud, and sometimes snow. The internal bearings seem to be sealed well since there isn't yet any sign of the hubs failing.

is possible to use this with a bike with electric motor?

Sure - as long as you currently have one wheel (usually the front) whose hub can be swapped out for the Dynamo. Electric bikes often incorporate the drive motor in the back wheel hub, and often the gears as well, so only rarely would you be able to add the Dynamo to your back wheel. However, as an electrical engineer I also have to add that using a dynamo with an electric bike is probably not the most efficient way of lighting your lights (i.e. you are using the battery to spin a motor, that moves the bike, that spins the front wheel, which spins the dynamo, that generates electricity, that lights the bulb.) Lots of lossy energy conversions. It would be more efficient (and elegant) if you were to wire your bike's battery directly up to the light (with possibly a voltage converter between the two). One slight advantage of your original configuration though, is that your light will still illuminate even when your bike's battery is depleted... There's always a compromise :) Good luck!

my front wheel has 20spokes - specialized tarmac. will this work with it? never used such hubs b4 so curious. thx.

This will not work. This is a 36 hole hub meaning that it requires 36 spokes. You will need a rim that is drilled with 36 holes. Your rim only has 20 so it will not work.

is this compatible with six bolt rotor?

The Alfine dynamo is centerlock rotor.

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Reviews

D**T

Still ticking

I got this so that I could charge my cell phone which now doubles as my bike computer and music player while I ride. I have an pretty app heavy phone that sucks the power down pretty fast. With my my bike computer app and Pandora running at the same time this will keep the batter: 1. at the same percentage as it started with while keeping the screen constantly on 2. gradually increase the charge with the screen off. I have now put hundreds and hundreds of miles on it with no issues and continued output. Be sure to count your spokes for the correct model

12.10.2017

E**D

Powerful

Powerful enough to run both my front and rear (Basta) lights (I still take a back-up). You should know however is that the hub works well but robs power from your bike so you may not coast as long, as far, or as fast as you normally do. I guess you should expect a little drag but nothing you can't get use to.

4.03.2011

T**F

Bike Power!

I bought this hub so I can charge my phone and camera while riding my bicycle. I got it installed at my local bike shop for $25 because they were able to re use my spokes. I think it's about $45 if they cant. I can't feel any change in resistance from my non dynamo hub. I love the benefit of being able to charge my electronics while I ride, I can run applications on my phone and the battery is still full after my ride to work. It can also be used for lighting, but I haven't got that set up yet. This hub is for 32 spoke disc brakes.

2.11.2010

P***

It generates great but getting lights for it is expensive and difficult

I bought the hub and was all excited. It looks great. Had my wheel built and looked around for some lights for it.Virtually everything comes from Germany and is fiercely expensive. Most of the front lights available are halogen, not LED, including the lights Shimano sells matching the generator.Eventually found the front light from Planet Bike - LED and good features at a respectable price (5 stars for this light). So, front light was sorted out but I am still stuck on the back one. I will be really disappointed if I have to keep batteries on the rear light.I am going to spend some time messing around with the wires and LEDs and such but I really should have been more careful making sure the lights and accessories were available.

1.11.2013

Color	Black
Size	32H Front
Height	3.75 inches
Item display length	6.75 inches
Weight	907 g
Item display width	5.25 inches
Number of items	1
Sport	Cycling
Batteries included?	No
Brand	SHIMANO
Department	Men's
Manufacturer	Shimano
Item model number	EDHS501BL
Product Dimensions	17.15 x 13.34 x 9.53 cm; 0.28 g
ASIN	B0029LMT7A

SHIMANODH-S501 Alfine Dynamo Disc Hub

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