So, first I ran across something released a number of yrs ago (5 yrs maybe?) from Radioshack named after Ricky Carmichael & Travis Pastrana (1/5th scale). It looked more like a toy. However, I then found more recent/advanced bikes out there with aluminum forks/swing arms, real chains, paddle tires for sand, motard tires for street, and some with nitro engines! From the vids Ive seen so far, the handling seems to be improving with each generation. They need nice soft dirt. The biggest disappointment for me is NOBODY is video taping these on a well groomed /tacky track where these bikes work best. They have real potential if you have the $ and some where/someone to race with!
Duratrax dx450 - http://www.rcuniverse.com/forum/m_9215517/tm.htm
1/5 scale, not as expensive as arx540 but doesnt look like it handles that great
ARX 540 - http://www.armodelling.com/
1/4 scale, very expensive, probably best on the market

VMX 450 - http://www.venom-group.com/itemdesc.asp?ic=VEN-0400
1/4 scale, coming out summer 2010. Im looking at this one to buy in future when I actually can afford another hobby.

Some of the best vids Ive found so far
http://www.youtube.com/watch?v=1N9wddVgVgQ
http://www.youtube.com/watch?v=5MIICohlxsU
http://www.youtube.com/watch?v=1zu94Apy ... r_embedded
http://www.youtube.com/watch?v=As7Q93b5bJA




