Recent content by usf_tim

Has anyone purchased from this company? https://ru.nkon.nl/checkout/onepage/ Does anyone know of a reputable company that is selling bulk 18650 cells in US....50 to 100 cells? Thanks Tim

Do you have a spreadsheet showing $$/Wh or $$/lb for the different cells.....How did you come up with 29E as best value? Tim

Can anyone suggest a spot welder for under $200. I don't have easy access to 220V so 110V would be best. I have seen a few DIY ones on the forums but not sure if that is any cheaper than buying one from China. What should i be looking for in a welder (max current, a foot pedal, variable...

Has anyone paired the Bafang with Shimano 2014 Alfine 8? Any problems shifting under load or high speed? http://www.amazon.com/Shimano-2014-Alfine-speed-Internal/dp/B007XU0IX4 Tim G

I was thinking of using one of EM3ev battery packs with the Bafang 750W motor. http://em3ev.com/store/index.php?route=product/product&path=35&product_id=161 Has anyone tried this battery with 750W motor? Will this pack be able to handle the current? Does anyone know what em3ev charges for...

If his wage calculations on frame cost are right then Trek is making a killing.

Long video but check min 8.5 for a good comparison. I could buy 3 motorcycles for price of one Optibike. https://www.youtube.com/watch?feature=player_embedded&v=NF4MIEkIBZs Tim

Thanks for quick reply. I was thinking of using gates carbon drive. I want eliminate the chain and sprocket( less mess and maintenance). I would think either NuVinci or Hub motor designer would need to design from ground up to keep the weight to a minimum. I'm looking for something that is...

Does anyone know if it is possible to put something like the N360 inside a rear hub motor like magic pie 3? http://www.fallbrooktech.com/cycling/n360 Thanks Tim

Goathead, I would agree with you that above a certain point tv size doesn't improve the quality of the show. I think anything above a 46" is going to be about the same. A 70' screen that cost 10X much is not going to improve my viewing experience but a 26" screen is going to be a...

I was referring to what Dogman called "big dick" syndrome. That is over paying to have the "best bike". I own a Galaxy S phone that cost me about 4x less than the latest Iphone. Since both Samsung and Apple have economy of scale ie both sell hundreds of millions of phones their is very little...

I've always been amazed that some e-bike cost up to $15K(5x cost of my 1st car). Can't wait for economy of scale to kick in when e-bikes become more popular. Electric motorcycles are selling for less that top of line e-bikes. I guess they have their manufacturing cost under control...

Has anyone posted anything on shock absorbers that have energy harvesting capabilities? Something similar to this but for a bike instead of a car. http://blogs.discovery.com/files/energy-harvesting-shock-absorber-june-2011.pdf I think it would work best for off road mountain bikes. Just...

I would like to build an e-bike that is low maintenance and easy to use. I was wondering if it is possible to combine Nuvinci Harmony and Gates Carbon drive to make a very simple to use e-bike. I want to know if their is a way to link the Harmony to the motor current so that the motor stays...