Yes that is a TerraCycle idler, it is a dual with one power side and one return side. The name on the Trike cost $10.00 installed. The AB tadpole is only 8" from the floor to bottom of seat, I am not sure what size rider the AB will take. But you would be better off looking for a trike with a longer boom option. I think GreenSpeed offers one. The price for the AB is a fantastic bargain. I have all great equipment on it. Dura Ace bar end shifters and 105 & XT shifting. Alex wheels with Comet Kevlar tires. I just switched them out for Scorchers TR. here is a picture with my regular seat cushion.
