RE: Official E-FIRESTORM thread
$35 is a really good price for the pair of shocks and caps. At tower the AE shocks are about $41.xx and the caps $2.xx. They finally have the HPI shocks now in stock for $45.xx.
Higer contrast at the corners does make sense, I'm sure you'll better be able to discern sooner how the car is rotating around the axes to be able to make correction on the line your trying to drive or the pitch in-flight.
For race tires check out the Pro-Line website. Hmm actually it looks like they recently put all the 1/10 truck tires in page so it is not quite as easy to figure out which are race tires and which are bash tires. Well anyway the race oriented tires tend to have the smaller pin treads as opposed to the chunkier and blockish treads for bashing, crawling, and longer life. Edge and Blade are front-only race tires. For drive wheels you are looking at things like Hole Shots, Step-Pin, Lug Nut, Bow-Tie, Snake-Eyes, and maybe Galdiator. Read the product descriptions on those to see if they're good for hard packed or soft conditions. This will help you remember what to look for when you go out the track so you can recognize the tires others are running.
When you go to the track check out the dirt when its dry and when they have wet it down. Also take a peak at what most other people are running.
At my track it tends to be softer soil, and when it is wet, the mud really like to clog the tires. So at my track Step-Pins and Lug Nuts seem to be the best all-around tire.
The HPI Ground Assault tires that come with the truck are a really hard compound and the tread design resembles Hole Shots. So you can get by with these for racing your first time out but you may want to have a set that matches track conditions for the next time you go out.
Well anyway that's about what I've learned so far...
E-Firestorm has 12mm Hex Hubs front and rear. I don't know what the mounting surface on the RS4MT wheels looks like. Give HPI Tech Support a call.