What you will need:

Prop adapter x 2 : http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=16578
Wheels x 2: http://www.hobbyking.com/hobbyking/store/__5616__Light_Foam_Wheel_Diam_100_Width_30mm_.html
BotBitz 1000rpm Gearmotors: http://www.botbitz.com/
2 x m5 nuts
4 x Washers

This is by no means the best robot motor hub you will ever make but it is possibly the easiest.

The Bits


Disassemble the prop adapter


Slide adapter on to motor, place on washer and tighten up nut. This should squeeze the collet tight so it stays on your motor.


Grab a wheel. A second washer and the top of the prop adapter.


Slide wheel on, then washer and nut and tighten.


Repeat for second wheel


Very very very simple. But pretty dodgy. Hub weights 15g.

Steve
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Steven Martin
Twisted Constructions
http://www.botbitz.com

I did that using these in squirrel demoraliser, worked pretty damn well except the foam was slipping (probably due to excessively huge diameter).

http://www.hobbyking.com/hobbyking/store/uh_viewItem.asp?idProduct=8890

Out of stock ever since...

They pulled off after killer hit em a few times so will be interesting to see if the collet kind works any better. I'd replace the cone with a nut and body washer for those ones.
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YEAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAH

haha but the cone is hella stylish
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<Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls

A good idea is a good idea

Roman chariot hubs ftw lmao. Thats great.

Perhaps you could get away with making it a bit lighter by using a crush tube between the adaptor and end nut (like inside the foam wheel) and then you'd only need the one nut instead of 2.
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www.demon50s.com - Minimoto parts
http://www.youtube.com/user/HyzerGlen - Videoooozzz

Yeh I think there is a lot of ways they could be made better, with a few mods.

However I was going for easiest and simplest. You require maybe a vice or a pair of multigrips and a spanner to do this.
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Steven Martin
Twisted Constructions
http://www.botbitz.com

Fine tuning things yourself is half the fun of being a builder, you can't do ALL the work for everyone
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<Patrician|Away> what does your robot do, sam
<bovril> it collects data about the surrounding environment, then discards it and drives into walls