Quote:
Originally Posted by rc_cola1323
Sorry guys, I don't know what to tell you. It is what the engineers told us at Sunrise Medical and it doesn't show up on either our bathroom scales or our scale at school. It measures every .25 lbs. So I guess itz under .25 lbs. 
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If your custom wheel is .3 lbs and is set up for either a sprocket or live axle it will likely be lighter than or equal to the pictured wheel with a setup such as the one Art described to drive it. Combine this with the strength concerns mentioned by some of the posters and you may want to look at what you really gain before deciding to use this wheel.
Sponsor donations are nice, but the parts always need to be evaluated against the alternatives.