What gearing do you use in 4S?

[Pulse]

I've got 2 HYPERION G3 in 2S and 5500mAh, which gearing would you recommend? Thx

[Tiernan85]

i'm using SMC 2S 9000mah and gear it now 20/65. I just bash around anywhere and everywhere and it works well for me thus far now.

[UberBricky42]

If you try the search, you'll find alot of threads like this: http://monster.traxxas.com/showthrea...ght=4s+gearing

Just type in "4s gearing" and you'll come up with alot! Also, Brian G's speed calcualtor (sorry, I don't have a link as I am slacking at work) is a great tool

Actually, that thread is on the first page. Sorry, but this topic has been beaten like a red headed step child

[Revo¹]

BrianG's calculator is [here].

[brett_dirtbike]

i was running 23/65 for a couple weeks (around 38 mph) until i stripped the spur and the LHS only had 58 in stock so i have been running that for a while (around 41 mph)

i ordered 3 more 65t spurs that should be here in a couple days.. plenty fast for what i'm going and if i need more speed, i have a 54t in my parts box!!

[Pulse]

In the TRAXXAS quick start instruction they recommend 18/54 gearing instead of the stock 18/65 for 4S. Does anyone of you use this gearing?

[littlejohn]

In the TRAXXAS quick start instruction they recommend 18/54 gearing instead of the stock 18/65 for 4S. Does anyone of you use this gearing?

Yes I do.. but I also run Losi XTT wheelset. this combo makes for very snappy response.. much bettter than running stock wheels or even response pro wheelset.

[BigART71]

I'm running 18/65 on 4S. I like it, I have more top end and it still has a ton of bottom end.

[mechman25]

Pulse

The specs on the g3 5500 are 158.5 x 46.8 x 20.7
How well do these fit in the battery compartment on the ERBE?

Too bad that the 3s is 30.7 thick.

[Pulse]

They fit perfectly, as if they were made for the revo . They don't move at all but have enough place:

http://www.servimg.com/image_preview...=29&u=13940536

To my mind you could put G3 3S if you really push them but I don't know about the temperature then..

[BigART71]

What kind of temps should we be looking for and what should we not exceed?

So far my ESC fan hasn't kicked on, but once and it was 92F out.

[boedac]

Pulse,

Under the user name welcome bar at the top of the page there is a Search option. This question has been addressed many times and will prob save you time. I use the optional gearing with turnagy 5.0 7.4 lipos and get about 40 mph on badlands on integy dish wheels. good luck....

[Chachi_RC]

In the TRAXXAS quick start instruction they recommend 18/54 gearing instead of the stock 18/65 for 4S. Does anyone of you use this gearing?

The optional spur that they include, 54t, is used to reach their claimed top speed with 4s of 40+mph. Personally, I think you need to be careful with that gearing and watch your temps. I am currently running 22/65, as my 62t spur stripped. But even at 22/65 it seems great for off road. Even enough to beat a nitro Rustler in a 40 yard dash!

[Balistyx]

Chachi I'm confused. If I'm not mistaken both your gear ratios 22/65 and 22/62 are slightly taller than the included 18/54 gearing and would have higher top speed and presumably higher temps. Why would you need to be more careful with 18/54?
I've run 18/54 quite a lot on 4s without any temp issues, but it does warm up a bit on 6s with that gearing.

[Chachi_RC]

Nah, you are right Ballistyx. Really my gearing from a ratio standpoint is pretty close. I run Badlands, and here is what I come up with using the BrianG's calc:
22/62: 38.47mph
22/65: 36.69mph
18/54: 36.14mph
I was mainly giving a warning to keep an eye on temps (no matter what gearing), but more so than the stock 18/65 that the ERBE comes with.

[BrianG]

For a given gearing, you WILL get more heat going from 4s to 6s. The higher voltage on the same load (gearing/motor) would generate a lot more current. So, when increasing voltage, decreasing gearing to get the same speed will yield about the same temps. Also, gearing down a 6s setup for the same speed as 4s will improve runtime because you are pulling around the same power from the batts, but less current is needed.

To see a graphical relationship between gearing, motor kv, and voltage, check this out: http://scriptasylum.com/rc_speed/_bl_comparison.html