Originally Posted by
Krio
I have both motors would only use the 4.5 on larger/8th scale size tracks. The 5.5 was enough motor for me in my scrt10 most of the time. If you want to guarantee having enough motor wherever you go then get a 4.5, but indoors or on loose tracks the 5.5 is awesome.
Thanks for the info. I went ahead and bought the 5.5 I was worried about heating issues with the 4.5. I believe this will work just fine for the tracks I run on.