Gear Reduction Ratio Poll

[KrawlDaddy520]

I've got an e-maxx tranny with a 70t spur and 12t pinion a 2.5:1 reduction and a 53turn hand wound motor. I am new to crawling and gear ratios. Don't have a clue what to do. Need more wheel speed but can't loose what torque that I do have. Do I need to use the 65turn that I have and do some gearing ? Someone help please.

 

[redbeard]

Stock can, 2.5 to 1 GD-600 with the 18t stock pinion drilled to fit. 85:1 I like it, it is slow but it does have enough wheel speed to bump up onto objects. I may pick up a smaller pinion sometime to try out.

 

[KrawlDaddy520]

Thanks for the info. I was thinking of trying some different gear combos first just to see what happens. Thanks for the input...

 

[BENDER]

You can use a smaller spur gear, or larger pinion gear, to increase wheelspeed. Do the opposite to get more torque, smaller pinions and larger spur gears. You will lose torque when going after wheelspeed, there's no way around it. Most guys find a happy medium between torque and wheelspeed for their area/terrain.

 

[Mazlem]

I don't have the truck anymore but after my post on pg1 I changed to the 2.5 GD600 with 12T for 106:1. That was a great ratio for the Johnson 550 I was running.

 

[peej410]

I've got an e-maxx tranny with a 70t spur and 12t pinion a 2.5:1 reduction and a 53turn hand wound motor. I am new to crawling and gear ratios. Don't have a clue what to do. Need more wheel speed but can't loose what torque that I do have. Do I need to use the 65turn that I have and do some gearing ? Someone help please.

you could add some cells to your battery packs

 

[simtechray]

I run 85:1 with a 45t lathe motor.

 

[dzrtrnr]

I have ran the stock motor, mag mayhem, 55 lathe, and 45 lathe with a GD 600 and numerous pinions on my TXT with Moab XLs. My favorite combination is 85:1 gear ratio with 45 turn lathe on a 7 cell battery pack.
This gives me good torque and wheel speed.

 

[RD400]

WHat seems to be missing here is tire size. 70.1 is great if you are running 2.2's with a MM, but 70.1 with kongs is way out of wack.

My TXT runs a 6.75 inch diameter tire and I run high 90's for a final ratio with a MM. Enough torque to make it do a mean back flip if you stand on the rear tires but enough wheel speed to pop me over stuff.

 

[KrawlDaddy520]

O.K. I'm back. I tried something different. I ran a trinity 19 turn with the 2.5 with the 70t spur and a 9t pinion. I thought that it was going to do good but the more i drove it the worse it got. Lost some power along the way. The motor got really hot. I'm using an older Rooster speed control. Maby I need to upgrade to a Superduty or a Rebel 2.

 

[peej410]

ok my gear ratio in my maxx crawler is over 120:1 with a lathe motor and it has enough torque to do everything i want but its very slow. try a 55t lathe with your setup, its only 20 bucks