Tires tires tires. That's the most important thing.

As a new RTR owner, I know you have an insatiable upgrade fever. Don't completely give into it! Fight the urge to buy everything Avid and JConcepts sell.

Yeah the servo is pretty crappy... get a Savöx 1257 or 1258. The shocks actually aren't bad at all, just not great to rebuild and you really have to pay careful attention to remove any flashing on all those tiny plastic pieces. Stick with them til you get better. If you must, just get some V2 shocks and do a BB conversion like (almost) everybody else. Or, just wait til the AE BB shocks come out.

You can run those rtr shocks for awhile i won a few races with them just change out to the correct piston #, the correct oil, and if you want to put some shock limiter in there. Now for upgrades that alot of people did were +8chassis, bb spring conversion on the v2, the avid steering rack, also i like the rpm rods they dont break or pop off and titanium turnbuckles. Also u wont get better without practice which i need to learn also (: i like upgrading car ha
1 last thing dont take the need in upgrading ur esc or motor until alot later on that esc and motor in there is already pretty beastly i thought. Just my opinion though do what u want

I started with the RTR and its really not bad out of the box. Here is what I would upgrade n order when u can. Servo, tighten or glue servo saver, FT turnbuckles with RPM cups, ball diff, esc/motor, +8 chassis, avid steering system, V2 shocks. Of course u can change shock fluids and springs to your liking. But keep n mind b4 u spend a ton of money, u can get a Worlds with most everything on it. I'd do the first few things and put n some drive time and decide what u want. Remember to have fun

Ok, I recently purchased a used B4.1 Worlds. I'm trying to buy some rims/tires for it, but, low and behold there seems to be 3 different (minimum) rim holes for this buggy.
The original fronts are round with a 1.5mm(head size) screw that holds them on. The rear appears to be a 7 or 8 mm hex nut, not sure because I don't have anything that fits it.
Now, I've seen rims that are all hex, I've seen rims that have the round holde like for the front, then I've seen something kinda' star shaped for the rear.......... help me!! what's the deal?

Hideeho
What, if any, are the differences between asc1766 LIGHT WEIGHT out drives & asc9852 out drives? Pics on amain show the opposite ends of each so I can't tell.

The B4 and B4.1 use bearings in the hub of the front weel. The worlds car uses a hollow (female) axle with a button head screw, while the FT B4.1 and RTR use a male threaded axle. Either way, the wheel is the same. Wheels from Jconcepts or proline will fit. You can also get hex fronts, but they won't do all that much for you. The rear wheels use a pin through the axle that fits into the "star" in the back side of the wheel. These are ok, but you'll save yourself some trouble by upgrading to hexes in the rear. I stripped out a few wheels before I converted to hex, and I'm happier now. Again, jconecpts or proline will have rear standard, or rear hex wheels. The rear nut is a 8-32 nylock nut that you can get at any hardware store. It uses an 11/32 wrench.

I feel the same way. Since I put the BB's on I find my self at wot in places I never did before. Same with my SC10.

I read that some of you say the Traxxas bottoms work as well. When I did my conversion a few weeks ago I tried the Traxxas bottom but it would'nt slide down over the eyelet like the 22 did. Am I missing something here? I have no issues with the 22 bottoms but im curious.

I think it is a little early to make the decision to swap out parts with only one night of racing. I would safely say the +8 chassis would be an upgrade worth considering, makes the car more stable and easier to drive, but as far as shocks are concerned, opinions run across the board from guys who prefer the stock shocks, tamiya shocks, or kyosho shocks, as well as several options to convert the stock shocks to avid, losi, or kyosho big bore springs, and as you have read, opinions vary. The stock shocks are fantastic, btw.

My point is without some experience with the car, the changes you make will be based only on popular opinion and not your driving style, track conditions, motor, battery, tires, etc.

Another popular option is to swap out the gear tranny in the ready to run to a ball diff set up. But unless you have tried the gear diif for a while how will you know if the ball diff is better? Because some guy on a forum says otherwise, is not enough for me to start swapping out parts.

I would spend my money first on a good radio, tires, servo, motor, and esc before i would start adding or changing parts. And then i would spend what was left over paying for track time.

I have also read that the losi cups are a little taller and hit helps with the softer springs.

I could not have said it any better than that. One of the guys that I have raced with runs his vehicles completly stock and is by far one of the fastest people I have ever tried to keep up with. Keep it stock for now and learn the vehicle. You will learn that all the newest stuff put out there isn't always the best thing for you. And you will also learn that there are some things out there that can help, but you have to spend time with the vehicle to learn what you need to make it better for you.

Here's my concensus on the big bore springs: (Take it for what it's worth)

- I don't understand the theory beind it, but they make the car more plush. As my home track dries, traction comes WAY up, but it can also get pretty rutted up. The big bore springs help keep the car planted when landing, or hitting sharp ruts while putting the power down. There are 2 other very smooth, mid-high traction tracks that I travel too as well. The big bores can make the car feel very tame or lazy there. On those tracks I will either go up in rate, or back to the skinny springs to make the car more aggressive.

I haven't run a full size pack with the big bore springs, but they make a noticeable difference on my home track.

Are you using the traxxas upper collars?

I was told with the Losi springs I only need lower collars like traxxas or Losi not uppers I can still use stock uppers, is this true?

No, it's not true. The Traxxas lowers come with an upper collar that slides over your stock upper collar. The Traxxas collar is wide enough to keep the springs in place, while your stock one is not.