These friction tires will hopefully give a better grip... Print using 0.2mm layers. https://youtu.be/hIMoa_aeMOUI have included lots of versions with differently sized "loops" so that you can create your own preferred grip depending on your filament/speed etc. ( In the pics/movie I have used PI-ETPU 95-250 Carbon Black http://rubber3dprinting.com/ ) Use the rims found here: http://www.thingiverse.com/thing:1103751 This snap-on design is also available for tires/rims that can be used with the OpenR/C Touring Car or similar RC cars naturally. Download the Touring rims here: http://www.thingiverse.com/thing:1001223 and the tires here: http://www.thingiverse.com/thing:1001233 Enjoy! PI-ETPU 95-250 Carbon Black is a professional 3D printer flexible and conductive filament.Don´t need the conductivity? Well the conductivity is great for some things but perhaps not your first choice? Then consider this: This filament will give you some really nice benefits if the conductivity is not an disadvantage for your 3D printed design: •The material composition eliminates “stringing / webbing” issues. •The hardness of 95 shore A and the carbon black filler makes for great print abilities.•The carbon black filler is an excellent UV stabilizer thus the prints are built to last in very harsh environments.•The matte black surface finish has a very exclusive look.•The material feels very nice and dry to touch.•The elongation at break is only 250%.   http://rubber3dprinting.com/Follow me on Instagram and/or twitter: http://instagram.com/rubber3dprinting https://twitter.com/rubber3dprint For more info regarding release of the F1 car and also the other Open-RC project head over in this direction: http://danielnoree.com/ For OpenR/C Formula 1 print-files (after release) go here: https://pinshape.com/users/18846-danielnoree https://grabcad.com/library/openr-c-1-10-formula-1-car-1 For my designs check out http://www.thingiverse.com/Palmiga/designs & https://www.instagram.com/rubber3dprinting/ Due to the nature of 3D printing / material used etc... Keep in mind that you use my designs on your own risk and that I in no way is responsible for any damage och injuries.