It is their own design.

Does anyone know what a Ulti rear tire trued to 41-42mm weighs? Thanks

Ulti X-Med Rr 42mm = 11g

Rounding off the sidewalls will actually make a car more prone to traction rolling. Keeping the edges squared will help keep the car level, but definitely makes it easier for the tires to chunk.

To keep a 12th from traction rolling, I would do the following:

- Ride height down to minimum (3-3.5 mm)
- Dope less of the front
- Softer side springs (AE Black in mod)
- Softer front springs will make the car push and not traction roll (AE .018 fronts, for instance)
- Glue front sidewalls
- Widen the front of the car
- Take out camber gain at the front of the car (long arm setup on an AE/VBC/Xenon front end)
- Add front brace if you aren't already running one
- Depending on the car, thicker tube lube can actually sometimes help keep it level. Thinner tube lube means the weight can get thrown to the outside, helping make the inside of the car lift.

I typically won't take out camber, but that is because I want the tires to wear flat. I normally find I can fix the traction roll through other items before even having to think about camber.

Will reducing droop reduce traction rolling? Just a general question, we don't have that much traction

Wondering the exact same thing. Anybody?

If you were running a lot of pod droop, which in turn meant that a lot of weight was transferred to the front of the car when you slowed down, I could see how that might make the car edgier or want to roll more upon initial turn-in. I still think other changes could resolve the issue without having to take out droop, but it could certainly be another thing to try.

Not sure whether front droop will have much of an impact, but I may be missing something.

Thanks

Was running 10.5T blinky with Reedy Sonic Mach1 and gear ratio was about 55-65mm, depending on track size.

Anyone have a Trinity 13.5 D4 and 17.5 D4 1/12th Blinky setup? Need gearing and timing setup for a 100 foot track

70mm/pr with a resonable amount of timing on motor (40deg etc) in blinky (UK nationals tracks etc). 65mm/pr etc if trying to run 50deg (if it will last)
https://www.youtube.com/watch?v=QHotYxl5sUk

We never run boosted 10.5 in the UK so I can't help with that

Looking for front arm aluminum or steel pivot balls that will replace the stock AE plastic ones. Just not sure how these are measured. Part#, brand would help.
Thanks Terry

Hey durtbag, were you referring to the R5 front end or the Dynamic front end?
......the team associated web site may have the correct ones that you're looking for. RC4Less or lefthanderrc (websites) probably have that which you need.

12R5.2, all I find listed are the #8417 plastic version. But I have steel ones in my 12R5.1 (hybrid with tubes), and I'm sure they came in the kit. I would like to use these in my new OP12C as they are much smoother.
Terry

I've briefly peeked at the Oval racing websites(Rc4Less.com,Ovalstuff.com, LefthanderRc), and also TeamIRSRC and also TeamCRC......some of the options are teflon coated pivot balls , the standard # 8417 ones (plastic Associated parts) and the Bronze pinch-proof ones from CRC. I've stuck with the standard issue # 8417 pivot balls. Good luck with your choice.