Which Pinion?
 

Hello, I just ordered a B4.1 RTR (Brushless), and I'm wondering what the best pinion is to run in grass with the stock 81 tooth spur gear? I was thinking 17? It's kind of thick grass btw.

Thanks all!

Your manual should give you a spur/pinion chart in the back somewhere.

Also, you can use this site for a quick reference.

Hello,

Running in grass will really increase the amp load on your buggy. I would suggest starting with a 15 tooth or even the smallest you have 14 tooth, I know it will be way under geared but after running for 1-3 minutes check your motor and battery temp if you do not have a temp gun then if you cannot keep your finger on the motor for a count of 5 then it is way to hot.

If it is running cool then gear it up a little at a time such as go to a 16 or 17 and keep checking the temp.

Checking the temp is a good thing to do every time your run just to make sure there are not issues and you get max life out of your equipment.

Hope this helps

that sounds bout rite...if u go to a track i would gear it to around 25-26