What pinions are you all using?

[vonmarshalll]

I have 2 different RC10’s nearing completion, one with a 10.5t Hobbywing Justock and the other with a 17.5t motor.

I had a 23 and a 25t 48dp pinion lying around but seem quite restricted in how the motor is orientated and guess I can only fit something like a 20 and maybe a 28.

I am using the FanRC Stealth but believe the dimensions are identical to AE.

Keen for any advice before I buy some more pinions that don’t fit!

[juicedcoupe]

With brushless, you might have to switch to a slightly smaller spur in order to get your desired gear ratio.

[guggles]

32/81 is what im running with a 17.5 I believe.

[juicedcoupe]

Here is the gearing chart from the 2014 Worlds car.

[vonmarshalll]

Interesting link…

So 19,20,or 21 should fit in the small range and 28-30 in the larger.

I did not know I was restricted until I tried to fit one.

21 or 30 recommended for the 17.5 with a * by one.

I think I’ll experiment and get one of each.

Thanks

[RC10th]

21 is for dynamic timing
30 is for blinky

For 17.5 that is....

[Charlie don't surf]

6.08 FDR? Man.... I'm at 5.61 FDR at 43* on a Trinity Slot 2 17.5 with a 30mm fan and with NC summer indoor racing (no AC at our track) I'm under 140F on the motor in a 6 minute heat. They're gearing conservatively. That B4 slipper plates setup takes a 72T spur easily and opens up gearing options

[vonmarshalll]

21 is for dynamic timing
30 is for blinky

For 17.5 that is....

I’m using a Justock esc / motor and if I race it will be in restricted classes so blinky it is.
Having said that there is talk of switching to 13.5 so I may get the 28 as well and see what difference, if any, I notice when it is on my 17.5 while practicing.