ECX AMP Tooth number?

[ChunkNorris]

Recently I bought the ECX AMP but the spur wheel broke. I looked for a replacement but I don;t know which one to get because they all have a different number of teeth. Can anyone tell me the number of teeth the stock AMP's spur wheel?

Thank you in advance

 

[X]

It is a 48p 87t spur.

http://www.ecxrc.com/Products/Default.aspx?ProdID=ECX1076