Shogun6

Putting new proline trenchers on the emaxx.

I know I need new hubs as the originals are 14mm and the prolines are 17mm.

I ordered the hub conversion kit so all should be good at the wheel.

I think the prolines are a bit of a taller tire with theoretically more top speed and slower acceleration. Will I need to regear?

If a regear is in order then what gear??

WindDrake

iTrader: (13)

If you put on taller tires, you -should- regear to compensate for it.

Typically this just involves a change of the pinion gear (the one on the motor.)

What tires are you running now?

Shogun6

I am running the stock tires. Monster truck style. 3.8 inch rims.

Hoss81

what motor/battery/esc setup are you running?

If you are running the factory brushed setup, I'd probably go down a tooth from whatever it came with. If your running brushless, I think you'll be alright.

WindDrake

iTrader: (13)

3.8" Stock wheels?

Ah, ok. Maxx Chevron's.

Those are 5.75" tall wheels.

Trenchers are 6.89".

You'll want to gear down, if you want to keep your performance the same.

I run 19/65 on 6.5" Trencher-X's. It gives about a 1.14:1 rollout, on 5S LiPo.

Stock E-Maxx is 17/68, which could possibly give you the right gearing depending on your setup. Do you have the Brushless E-Maxx, or the Twin-Titan 16.8v E-Maxx?

Shogun6

Running twin Titan motors with nimh batteries. Basically stock setup.

A spare gear came with the truck I have to see if it is larger, if so then I will swap it in.

Yes tires are chevron in pattern.

I think traxxas and brushless emaxx have tires 6.3 inches tall.

I may consider the trencher x instead.

Shogun6

Now I am considering the trencher x or big joe...

Ack too many choices...

WindDrake

iTrader: (13)

The stock 17/68 gearing of the Brushed Twin Titan E-Maxx (Check your gears to make sure, but this is what I've been able to find) gets around a 0.87:1 Rollout. (22,000 RPM @ 7.2v = ~3055kv)

To pull this off with Trenchers, you'd need a 14t (0.85:1) or 15t (0.92:1) pinion gear.

Shogun6

Thanks for confirming it after a good bit of research and head scratching I also came up with the 14 or 15 tooth pinion gear. I will order those and give the motors a cleaning when I get the tires.