My name is Josh and i am a intern at Eliquid media (great place) and the owner (Mr. Cool who also designed the bike) is holding a contest to win a roundtail bike. To enter the contest go to http://www.winaroundtail.com/ happy biking 
I'm guessing that you mean steel. Since it's not possible to weld dissimilar metals (ferrous and non-ferrous) together, I'm curious as to how it can be mostly one alloy, rather than entirely one alloy.Thanks for your comment and that little typo has been fixed. Also the bike is mostly steal but there is a aluminum bike coming out later this year.
So, the Hybrid and the 26" MTB listed on your The Bikes page (http://roundtail.ca/main/the_bikes) both list aluminum frames. I understand steel is flexible, but do the rings in the back make much difference with aluminum frames?Currently the bike on the home page is Columbus spirit steel. We have a Ti frame and the hybrid is Alloy 6061. We hope to have a carbon road frame in about two months
To be honest i didnt think there would be much of a difference in the feel while going over bumps or cracks in the road so i was suprised when i actually could feel the difference. With some big bumps on the triangle design (steel) i would stand up on my feet so i wouldnt fell the bump as bad but on the roundtail (aluminum) i could actually just keep riding on over it without standing up and it wouldnt bother me. So to answer your question it does actually make a difference even with the aluminum frames.So, the Hybrid and the 26" MTB listed on your The Bikes page (http://roundtail.ca/main/the_bikes) both list aluminum frames. I understand steel is flexible, but do the rings in the back make much difference with aluminum frames?
So those bog hoops flex with each little irregularity in the road?To be honest i didnt think there would be much of a difference in the feel while going over bumps or cracks in the road so i was suprised when i actually could feel the difference. With some big bumps on the triangle design (steel) i would stand up on my feet so i wouldnt fell the bump as bad but on the roundtail (aluminum) i could actually just keep riding on over it without standing up and it wouldnt bother me. So to answer your question it does actually make a difference even with the aluminum frames.
Yes they do have flex in them but also the circular design spreads the vibrations out over the ring helping reducess the impact of the bumps. So between the flex and circular design it makes for a very smooth ride.So those bog hoops flex with each little irregularity in the road?
So it's made from aluminum, and designed to flex?Yes they do have flex in them but also the circular design spreads the vibrations out over the ring helping reducess the impact of the bumps. So between the flex and circular design it makes for a very smooth ride.
the frame is aluminum. the circular design is made from steel. So in a way yes it was kinda designed for flex but the design was mostly for distributing the shockwave/vibrations from bumps through the circle rather then your back.So it's made from aluminum, and designed to flex?