Spur pinion combos?
 

I am about to order a 7xl, 9920 and UBEC from Mike and need to sort out what to do with my gear set up.
Do I stay 32p and use the 72,70 or 66 that I already have? If so would a 20 tooth pinion be too high?

I see the Strobe slipper using an Ofna 51 tooth spur, what pinion would be ok with the 7xl on 12 cells? And do I need slipper pads?

Obviously there are varying strength set ups for various applications.

Can someone suggest an appropriate set up for what I'll be running?

Anyone?

I assume this is in a E-maxx?
What do you use your car for, racing, bashing, speed runs?
I have the strobe, ofna 51T, 13T pinion and 7xl in my E-maxx with 12 and 14 cells (I'll probably go to all 14 cell packs though).
My strobe slipper came with pads, but I ordered a spare set anyway.
Not sure about staying 32p, I haven't tried. I went Mod 1 to be safe.
When is was ordering my set up Mike recommended to me 14/51 or 15/51 for racing and 12cells (with stock diff ratio). And 12/51 or 13/51 on 14 cells. I got the 13T, because 14 and 15 were out of stock.
51T/14T is about the same as 66/18, and 51/15 is the same as 68/20, if you stay with 32p.
Hope that helps a bit. Though it depends on what you want your car to do.

Thanks Patrick

That gives me some idea of sizes to run on my emaxx.

Do you know how fast your maxx runs? this should be very similar to what I'm doing.

I only have 12 cell set up now. Does yours go significantly faster when you run the 14 cells compared to 12?

I will see what mike has in stock with regards to pinions and go from there.

I'm not really sure how fast it is.
With 12 cells on the 7xl and 51t/13t gearing it's a bit faster than 14 cells on titan's with 66t/20t (Traxxas says 30mph with 66/18 and 14 cells I think), but with better acceleration. 13t pinion is a little bit too small on 12 cells imo.
14 cells on the 7xl is noticably faster than 12 cells, couldn't say how much though. 51t/13t seems ok on 14 cells for my track. But I'd like to try a 14t when I can get one, and when I get my new Quark. Other one burnt out last week. It was 2 weeks old.

Does oz in ozmaxx mean australia, I'm from Perth.

Yeah oz is auusie, I'm in Brisbane

I think I'll go 14 or 15 on the 51 spur and 12 cells, until I need new batts, then go 14 or 16 cells.

Were you running a 9920 before.?

No, I had a Quark 125 Monster Pro and they are sending me a new one on warranty.