I think motor shims might work.

Roche make a 0.1,0.2 and 0.3 set that will fit 1/8" kingpins. The label them as metric though and say they are M3.2

so youre cutting at less than 40mm/set per run?

You really need to use 14ga or larger with mod. I know people who have literally melted battery cases due to the heat of 16ga wires when running mod, and Hagberg insists that he fixed his fade issues from 2015 (I think?) snowbirds by changing from 16ga to 14ga.

You can go look at setup sheets to answer this question, but the answer is yes. Fresh cut tires for mod tend to be in the 39.5 range for fronts, and then 40.5 for rears, judging from most recent setup sheets. That doesn't say a lot due to variances in rim diameter between manufacturers, but the general idea is that (depending on compound) you will basically be one-running tires. I personally do one mod run, one 13.5 run, and then chuck 'em.

https://cimg5.ibsrv.net/gimg/www.rct...3337e0138c.jpg

This picture is of a set of tires ready for one modified race. I think they're about 40.4 or 40.5mm. Modified power just burns the fronts off, with Mod using twice the battery power or more compared to Stock, and they're soft compounds because they give a better more forgiving feel than the harder front tires typically run in Stock.

I use larger gauge wire for the battery leads, but from the ESC to the motor the 3 strands of 16 gauge do fine.

In Mod, how much glazing do people get running SXT on black carpet? I've found that without a LONG soak, over an hour in some cases, my rear tires glaze over after a run time directly proportional to how long they had tire sauce soak into them. I've glazed over Pinks, Magentas, Greens, Blues, the Greens glaze less but it still takes a long soak. The car runs like a champ until it glazes over, but I had the same problem at both TQRC and 702.

There doesn't seem to be a downside to the long soak, some claim that too long of a tire sauce soak make it inconsistent or cause traction roll but this doesn't seem to be the case as long as you wipe the tires down some time before the race. It's just inconvenient, how you need to prep tires hours if not the day beforehand.

Wear is exponentially higher in mod. At USIC I cut ULTI JS (pink) rears to 40.4 and JM (mag) fronts to 39.2 and was getting 6-7 tenths wear. They were probably only good for 10 laps beyond race distance.

On black carpet going too tall the edges will start to peel or the front glue will sheer off and you'll wad up the car. At minimum if you rerun them the fronts will need the glue ground off and glued fresh. Hanulec is right about 12 min. Basically 2 6min practice runs, regluing between, or a short shakedown run on a used race set.

The CRC CK25 was worth a try, it drives really good but is a major PITA to work on and maintain.

Back to Roche! P12 Evo is calling my name

I think you will be rethinking that when you stat running harder and putting more power down. 16G will unsolder from the esc.

Surprised to hear this as I own both cars. What did you find difficult on the CRC?

I took 7500+ milliamps out of the pack in 2 practice laps and then the 8 minute race when I hit the LiPo cutoff with half a lap to go, and the leads are still very much attached. The battery was warm, maybe 110 degrees F, the ESC was about 140, motor probably 125, wires just perceptively warm to the touch.

14 gauge wire cross section is 2mm square. 16 gauge is 1.3mm square. That's not a big difference. The wires are nice and short, and there are three of them! The battery leads, on the other hand, were 12 gauge, I think.

If people want to run larger wire, all power to them, but it's not going to kill you. I don't know, maybe I solder a little better than the average bear.

Sure, it is only a ~63% difference in resistance.

I am glad to hear you haven't had issues with 16ga, but many of us have either had issues ourselves or witnessed other people have issues (look above re: melted battery case, etc.) You are more than welcome to tell people to 'git gud at soldering', but I personally will continue to recommend using (at least) 14ga wire.