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Hi thought I would feed back to you all for those who are interested in crank drive kits. I have been using a 24v kit with headway 15ah cells from eclipse bikes on my mountain bike for a couple of years now and overall I have been impressed with its reliability, speed, hill climbing ability and...

New SIMBB (Super Integrated Motorized Bottom Bracket) mid drive system by Optibike : ebikes

Bicycle elevator: This Bike Elevator is an Engineering Marvel - Cheezburger All he needs now is some electric assist....

National Geographic quiz on batteries Quiz: What You Don't Know About Batteries

National Geographic quiz on batteries http://environment.nationalgeographic.com/environment/energy/great-energy-challenge/battery-quiz/

Guardian comparison of athlete on cheap bikes vs journalist on expensive bike :) http://www.guardian.co.uk/environment/bike-blog/video/2013/jul/17/man-v-bike-video

Interesting website, shows all the ideas people have experimented with over the years Unusual Pedal Bicycles. The Rocket-Powered Bicycles. Steam Bicycles.

Crazy tall bike - looks rather painful to fall off from The Stoopid Tall Bike: It's Exactly What it Sounds Like - Cheezburger

Just seen one of these on ebay, unusual looking system, only16.8V SRAM Sparc Hub 16.8v 5 Speed 36H, ****ELECTRIC BIKE CONVERSION KIT**** | eBay

Why couldn't the bike stand on its own? Because it was two tired......

Hi I am looking at making a wind turbine using an old hub motor as the generator. Any of you got any experience of anything like this? Would I be better off using a direct drive motor or could I use a normal one and jam up the freewheel somehow?

I had been getting a cold head lately as my bike helmet is too well ventilated for winter, but putting a hat on meant the helmet no longer fitted. This balaclava is thin but very windproof and warm and allow my helmet to still fit with no adjustment: BLACK WINDPROOF MOTORCYCLE MOTORBIKE...

An idea occurred to me regarding the issues of throttle legality and also the level of assist a bike gives you relative to your cadence. Why not make an electric bike that has a throttle but it only works and can only be used to give assistance when the pedals are rotating? In effect it would...

Hmmm....... Boing! Boing! WIN - Cheezburger Would be interesting to try and ride it :)

Unusual new design, not sure it's very good though..... bicymple. the bicycle, simplified. - YouTube

Cheap tyre for someone? Think these are quite popular on electric bikes: Ex Display Schwalbe Marathon Plus MTB Mountain Bike Tyre - 26" x 2.10" | eBay

Thought some of you folks might like watching this: From the Archives: 1940s Bike Tutorial of the Day - The Daily What

Been looking at these kits, wondered if any of you had tried them? 3 Chainwheel 24V 250 Watt Ebike Kit

might be worth a go for those fancying a little project without massive expense? 1 Electric Bicycle Conversion Kit 250W 24V Cycle Bike Kit with Battery UK Seller | eBay

Be interesting to see where this goes in time BBC News - Scientists boost battery strength with small holes