Hey Guys,

I am looking at props for my fastech as my stock one needs replacing and rather than getting another stock one I figured I would look into other options.. I know the X642 is the best for this boat when upgrading, but don't feel like spending a lot on a sharpened and balanced one, so I have been looking at the Graupner CF props here on OSE since they are cheap.

My question is what is the best size to use if I were to try this kind of prop? I can't find any that have the same diameter and pitch as the x642..the two that are close are the 42mm or the 45mm, however they either have too much diameter with the right amount of pitch, or the right diameter but too little pitch.

So stock prop is 1.6 x 2.5

X642 is 1.65 x 2.64 (which is the one everyone says is the best for this boat)

42mm is 1.65 x 2.31 (is this too little pitch?)

45mm is 1.77 x 2.5 (is this one too big in diameter?)

Hell I am even willing to get both if either will work, but there is no point in just wasting $6 on a prop that is not good for the boat and will never be used.

Then again, perhaps none of the graupner props are a good fit for the boat and I am best just getting a stock replacement til I have some money for a x642, but I wanted to check with those of you with knowledge on this.

The boat has the stock motor and esc and running on 2 x 2s 25c 5000mah lipos



Thank you.