byggd

I currently have an OFNA 18163 / 65T spur gear and I need to go to a lower tooth count. Info is hard to find with OFNA no longer producing.

I am seeing a lot of listings on EBAY but no tooth count it listed. Can anyone assist with a part number for a 50/55 etc with the same screw spacing as a 18163?

Don

bill_delong

OFNA was a distributor not an OEM, they rebranded cars from many different OEM's where the 2 most popular brands were HoBao and HongNor, both are still in production to this day, you just need to look for your specific chassis:

https://www.hobao-usa.com/product-category/rcparts/

http://www.rc-willpower.com/Cart/ind...y&path=487_495

You might be able to cross reference your part number on one of those sites!

byggd

I knew about HoBao but HongNor is news to me, thanks to much!

I will do some research and see if there are a compatible models from one of these companies.

There is fairly large hobby store a few miles from out house. I may make a drive and depending on who is working that day, I may get lucky. :-)

bill_delong

Didn't see any 65T gears on HoBao but found the following, does this look like your part?
G.V. Model 65T Gear #MV0651 [Mammoth] [Reely]

byggd

The link doesn't seem to be working. I'm hoping to find a gear with the same mounting a the OFNA 18163 but smaller (less teeth). With the 18163, the mount I am using will not adjust far enough to install a drive gear.

bill_delong

Willpower is located in China and takes a while to load, you need to be patient, just look for your car name to get the parts you need:

byggd

I was getting a "page cannot be reached" but it is working now. As you said, just takes time. Here is the OFNA 18163 gear. I may be out of luck and have to run the OE steal with the OE smaller tires.

Here is the OFNA 18163

bill_delong

Do you have the Ultra LX One?

https://www.ebay.com/itm/13387628461...2YVZ8AJ1YXSZ7B

byggd

I bought it off ebay years ago and was listed as a Ultra MBX R2. The manual I found seems to support this.

bill_delong

In that case I believe HongNor is the OEM and many of Ultra successors may offer compatible parts such as the spur I linked on post #8

byggd

Cool! Thanks for the tip and all your assistance on this one!

byggd

With your help and some research, I think I found an option! Will know in a week or so :-)

RC10B74 Center Diff Spur Gears, 72T/48P, 78T/48P

bill_delong

I don't think the AE gears will be compatible, they are for 1/10 buggy with 48P and that's not going to do very will with a 1/8 rig even if those holes line up and you can get it to fit

MOD 1 gears are significantly different and far more durable

byggd

I couldn't find specs on most gears as far as center hole diameter or mounting screw hole spacing. "If" these mount up I will be happy, even if they don't last, at least I can have some more fun with my old truggy. I had no luck finding MOD 1 spur gears that look like they would mount up. Most use a 3-hole mounting or do not have an open center hole. Options are a bit limited when converting from nitro to brushless. Option 2 would be completely replacing the center hub assembly.

bill_delong

facepalm... I've posted links to 2 different sources for compatible spur gears, good luck!

byggd

I very much appreciate all your help and I looked at every spur gear offered on both sites, 32 and 48P. None except the ones I posted even came close to the mounting needed to replace the current gear.

byggd

After reading further about others that have done similar conversions, I see what you are saying now. The HongNor LX-1/2 EP parts may do the trick! I have ordered a spur / pinion gear and have high hopes! The pricing was a little better on eBay than the HongNor site (same shipping location).