501X Worlds Gearing

[DaveG28]

Hi all,

On the worlds or big belt 501x (91 spur, 37 pulleys) what gearing have people used for nosram/lrp 5.5 and 6.5?

I've used 15 pinion on 5.5 and 17 on 6.5, but this looks way too low when looking at the gearing chart, what have others used??

[Doomanic]

16T on a Novak 5.5 sintered.

[Colinevan]

Originally Posted by Doomanic

16T on a Novak 5.5 sintered.

i also used 16t and 17t on a 4.5...

[DaveG28]

Interesting, looks like I may have geared wrong, may need to experiment!

[Kisrozi]

for 91T spur,18T pulley and 37T Differential pulley the gear ratio is

Pinion gear ratio
16T 11.69 :1
17T 11.00 :1
18T 10.39 :1
19T 9.85 :1
20T 9:35 :1
21T 8.91 :1
23T 8.13 :1

ciao

[AaronR]

...or this... http://www.oople.com/rc/photos/cars/...-gearchart.pdf

[pugs]

Originally Posted by DaveG28

Hi all,

On the worlds or big belt 501x (91 spur, 37 pulleys) what gearing have people used for nosram/lrp 5.5 and 6.5?

I've used 15 pinion on 5.5 and 17 on 6.5, but this looks way too low when looking at the gearing chart, what have others used??

Hi Dave, I use a 17t pinion on a novak 5.5 or 21t pinion on a novak 6.5 with 4200 or 4600 nimh batts and is super quick , as you will know!!! 96t spur though, thats with 37t rear diff pulley,18t centre pulleys and a 36t one way in the front.

[DaveG28]

Yeah, I guess what surprises me is that on the BMax I am gearing a 5.5 at @9.5 to 10:1, yet on the 501x worlds I use a 15t pinion, which is 12.4!? I'd have thought one of those must be well out!?

[GRIFF55]

17 or 18t with a 5.5. running the ae 91 spur(i think) with the front one way pulley on That was with nimh 4500. try a few and see what suits dave, maybe a bigger spur would give a smoother drive for you?