Depends on the tire. Jaco's probably need some trimming. But Gravity's are perfect for club racing at 45mm out of the tube.

On asphalt I run the tires straight out of the package. They are a tad out of round but I'd rather have the extra 1 run I would cut off of them. On carpet I wouldn't run them that big.

Going to have to disagree with that, 45mm is still too big for any kind of semi competitive club racing on carpet.

If you want to get some life out of your tires try running a blue or green compound. Both of those will give you a lot more life then some of the softer other types of rubber. You could cut them down to something like 42mm and still get a dozen or more runs no problem.

It really depends on the grip level
I like to at least skim new tires to start them round

Last summer we ran huge tires at TQ (carpet) with good results, grip was low, track was dry and fuzzy

This year the grip is much better, anything more than 42mm will grip roll

On the Orange rear tire...
This tire has a few benefits, It is far more durable than Yellow, due to the firmer Gray outside edge, and will free up the rear of the car
However, it does work better when the grip is higher

Yellow for when grip is questionable

Xray X12’15 1/12th scale kit

In my personal opinion, and the reason I went away from the xray was the center pivot being to high and to big.
So it's great to see they have changed that! I think this is key, as with the 14, there is just no way to get the pivot where I wanted it.

you haven't indicated what sort of track surface you are dealing with.
at the local carpet track (TQ) I see maybe 1mm of tire wear from a practice day, maybe double that for a new carpet?

with asphalt it really depends on the local surface. at the local parking lot track (glarc), 1/8 foams would last 20minutes (starting full size) when the club first started running on that surface, now the wear is much better. when there was a permanent nitro track (crystal park) it was also a tire grinder in the first years but later when the surface was like glass the wear was very low.

notice, there are 2 consequences to too large a foam tire, poor handling and chunking. poor handling is annoying and chunking is tragic and even more annoying.

how big is too big is going to depend on your situation. if you rotate the tires after each run for even wear and stay off the boards, a set should last a few practice days. note the handling will improve as the tire size drops, so switch in new tires on practice days and save the small ones for race day. if you are chunking sidewalls then you are starting at too large a diameter and practicing false economy.
have fun.

Could have ran an associated pivot assembly, it bolts right in.

Thanks for the help. I run at premier RC raceway in Portland, OR. It's a brand new facility with brand new carpet. There's not much grip yet and not much of a groove. We run half the week off road(spiked tires- pulls up grove ) and half the week on road. I've heard using flexible super glue helps with chunking also...?

Help please.
Are, or were, there any 1/12 link chassis where the front plate had no lightening holes? Thanks.

That's right it does.
And after up grading to ae pivot points, using ae center springs, using ae front springs, ae side springs etc etc, I just brought a darn ae!
It's cheaper, parts are cheaper, and to be honest, I'm just faster with ae than I could ever get my xray!

I love xray! I race the TC's, love the quality, the instructions and manuals,
Composite parts etc.

But they still have not found the right groove in 12th far as I'm concerned.

The SpeedMerchant Rev 7 had minimal openings around the front of the chassis, where there is a small cutout just to clear the servo saver; and a larger one under the LiPo that I use to key the Lipo to the chassis. While that's not NO holes, it's still very stiff and rugged:

http://www.rctech.net/forum/9629061-post1.html

http://www.rctech.net/forum/11499402-post424.html

The SpeedMerchant Rev 6 was even more solid, but wider (and, if I remember correctly, did not have the pod updated for brushless):

http://www.redrc.net/2010/04/speedme...6-112th-scale/

The new Xray X12 2015 claims to have smaller front cutouts to help make the front end stiffer, but I don't know how that compares with what you're looking for.

At the risk of being flamed for not searching on this (I did try), what are some of the popular ESCs right now in 1/12th scale? I just picked up a car and need to get the electronics for it. I'd prefer a 1 cell speedo so I can avoid the receiver pack.

Thanks in advance.

My favs are the hobbywing 1s esc and the gforce/skyrc 1s esc.
These have the switch, caps and boosted built in. Therefore easier to fit (not much space on some cars) and also tidier!