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OFNA Spur Gear Question

Old 04-29-2024, 07:35 AM
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byggd
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Question OFNA Spur Gear Question

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
Old 04-29-2024, 04:53 PM
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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!
Old 04-30-2024, 08:32 AM
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Originally Posted by 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!
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. :-)
Old 04-30-2024, 08:55 AM
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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]
Old 04-30-2024, 02:04 PM
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Originally Posted by 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]
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.
Old 04-30-2024, 02:50 PM
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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:


Old 04-30-2024, 02:59 PM
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Originally Posted by 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:

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

Last edited by byggd; 04-30-2024 at 03:02 PM. Reason: Add text
Old 04-30-2024, 03:03 PM
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Do you have the Ultra LX One?

https://www.ebay.com/itm/13387628461...2YVZ8AJ1YXSZ7B
Old 04-30-2024, 07:56 PM
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Originally Posted by bill_delong
I bought it off ebay years ago and was listed as a Ultra MBX R2. The manual I found seems to support this.
Old 05-01-2024, 08:33 AM
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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
Old 05-01-2024, 10:49 AM
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Originally Posted by 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
Cool! Thanks for the tip and all your assistance on this one!
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Old 05-03-2024, 05:47 AM
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Originally Posted by 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
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
Old 05-03-2024, 06:00 AM
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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
Old 05-03-2024, 06:54 AM
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Originally Posted by 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
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.



Last edited by byggd; 05-03-2024 at 06:55 AM. Reason: sp
Old 05-03-2024, 05:34 PM
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facepalm... I've posted links to 2 different sources for compatible spur gears, good luck!
Old 05-03-2024, 06:32 PM
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Originally Posted by bill_delong
facepalm... I've posted links to 2 different sources for compatible spur gears, good luck!
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.
Old 05-05-2024, 08:15 AM
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Originally Posted by bill_delong
facepalm... I've posted links to 2 different sources for compatible spur gears, good luck!
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).


Last edited by byggd; 05-05-2024 at 08:17 AM. Reason: Add

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