I´m in the process of printing ALOT of OpenR/C Truggy Tires so i thought while at it i might aswell share some info on how i print them.
All my NinjaFlex stuff is printed on a 1st Gen Replicator with this modified driveblock: http://www.thingiverse.com/thing:267394
Basically i use the default ABS profile but i changed the temperatures to 220C on the extruder and 65C on the buildplate (Kapton tape). I set the speed pretty low on the outlines (25mm/s) to get a nice surface and around 40mm/s for the infill. I have also bumped up the speed for nonextrusion movements to 180mm/s to avoid stringing.
Below is a link to my NinjFlex profile for the tires. Note that i have set number of outlines to 4 and infill to 10%.
Makerware NinjaFlex profile: https://drive.google.com/file/d/0B7TCLh-I8q6YWFJuUnA1eVFxbzg/edit?usp=sharing


