attached guide

Love that guide. Last season (my first in 12th) my travelling copy of it was passed all over the pits!

I found that it applies to 10th WGT as well.

Thanks a coulple years ago I got tired of hunting around to different places for all of the 1/12th scale info so I put together that

it has served me very well. I also really like the New rc workbench (IPhone app) from the guy who wrote the XXXMain setup giude

Very Nice

I also have a theory that i need to prove out which could cause this phenomenon.

If you run the servo flat it creates a fair amount of bump steer (front tires toeing in when the suspension is compressed). If you turn in a slight bit to hard the car will lean over more and bump steer will increase your steering angle causing the car to over-steer. If you can drive smooth this effect won't be noticed because the car is not leaning over as hard.

This is just a theory but ever since I've gone to flat servo's in both my 12th and WGT I've noticed this happening. The vertical position of the links does not seem to help the bump steer affect.

I can now see why CRC uses the angled servo mounts, it completely removes the bump steer affect. The problem with this design though is controlling ackerman.

Hi 12th gurus..

What is the optimum tires sizes to run on carpet and asphalt??

Would 44mm front and 46mm rear good for both?

There is no optimum size, it all depends on the track, the grip you have and the motor you run.
Generally the slower motor you run the higher tyre you can use.
For good handling on carpet use 43mm rear 41.5mm front as a starting point

If your running at a big race starting tires in the 41mm range is good. The problem with starting this small is you won't get very many runs from the front tire.

For club racing start fronts around 43 and rears 44mm.

For asphalt I would run no less than 45 in the rear and about 1mm less in the front

but it really all depends on what you are doing

Big races with an F tonne of traction then 41 rears are not uncommon

blinky 17.5 club racing 45 mm is not too uncommon

Do you guys find that your front tires or rear tires wear out faster?

I find my rear tires rarely wear out, they are usually chunked to death. Fronts last a really long time.

Thank you all guys.

At the local club, we run asphalt and the veterans are saying the car would not have enough clearance if the tires are smaller than 52mm..

is that possible?

For club racing, I start with Yellow/Black @ 45R, 43F
They wear down to 41.5 & 39.5 after about 10 runs in Blinky.

At that point, I clean them up on the truer, and set them aside for the iic @ Vegas, where they are perfect for another few runs

I tend to wear my fronts almost down to the plastic. Setting the ride height when they get so low can be a bit tricky.

The only set I've had long enough (Magenta Fr/Pink Re) to wear out started at 44/46 and are now 41.5/42.0 so I'm thinking the rears wear a bit faster on my car. The fronts look like they've been chewed on around the outer edges which happened in the last few runs, rears still look great.

Well its possible if the asphalt is in very rough shape, and if it is that rough running 1/12 is a real challange.