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RC10 RPM Ultramold
Posted: Tue May 06, 2025 4:41 am
by Lavigna
This is a full RPM Ultramold made from all new parts. Everything is OG. I've got it pretty close to where I want it, just a few changes and additions to go. I'm also deciding on a body.
To me, these cars never look right with the Stealth cases, so I modified the plastics to fit the RPM transmission. I'm not sure if I will be adding more electronics as it looks so clean without. The no tire look is growing on me.
Re: RC10 RPM Ultramold
Posted: Tue May 06, 2025 8:22 am
by TRX-1-3
I can understand the no tires thing. This is such a phenomenal piece. However, deep down, you know you gotta put tires on it. Or, at least, two "O"-rings per rim, as I've seen lately.
Boggling of the mind occurring (due to the incredibleness of the build)
Re: RC10 RPM Ultramold
Posted: Tue May 06, 2025 8:23 am
by DSaw78
Amazing! Everything you build

Re: RC10 RPM Ultramold
Posted: Tue May 06, 2025 9:48 am
by Chewbacca
WOW, just WOW
Now may I suggest the Losi Jrx2 Pro SE body for this build? I believe the ultramolded was actually intended for that body.
Re: RC10 RPM Ultramold
Posted: Tue May 06, 2025 11:44 am
by Lavigna
TRX-1-3 wrote: ↑Tue May 06, 2025 8:22 am
I can understand the no tires thing. This is such a phenomenal piece. However, deep down, you know you gotta put tires on it. Or, at least, two "O"-rings per rim, as I've seen lately.
Boggling of the mind occurring (due to the incredibleness of the build)
Thanks buddy! Yes, I went back and forth on a few tire options and wasn't sold on any. I thought it looked good just rims for now, but I will have to chose something.
Question - Do all the HPI 5 star rear rims for buggies have a smaller diameter? The tires I wanted to use on the rear didn't fit because the rear rims are a smaller diameter.
Re: RC10 RPM Ultramold
Posted: Tue May 06, 2025 12:08 pm
by GoMachV
The era correct hpi wheels are all 2.0. They later made some 2.2 I believe for the Kyosho super nitro cars which would likely have the correct offset but are a 12mm hex and would not be era correct. Check part number 3032.
Re: RC10 RPM Ultramold
Posted: Tue May 06, 2025 12:31 pm
by Charlie don't surf
Chewbacca wrote: ↑Tue May 06, 2025 9:48 am
WOW, just WOW
Now may I suggest the Losi Jrx2 Pro SE body for this build? I believe the ultramolded was actually intended for that body.
That's correct
Re: RC10 RPM Ultramold
Posted: Tue May 06, 2025 3:12 pm
by RogueIV
GoMachV wrote: ↑Tue May 06, 2025 12:08 pm
The era correct hpi wheels are all 2.0. They later made some 2.2 I believe for the Kyosho super nitro cars which would likely have the correct offset but are a 12mm hex and would not be era correct. Check part number 3032.
I have a super nitro, I can pull a wheel later and get you measurements if you'd like.
Re: RC10 RPM Ultramold
Posted: Tue May 06, 2025 5:28 pm
by ZED32
Wow, absolutely stunning

Re: RC10 RPM Ultramold
Posted: Tue May 06, 2025 11:45 pm
by Lavigna
GoMachV wrote: ↑Tue May 06, 2025 12:08 pm
The era correct hpi wheels are all 2.0. They later made some 2.2 I believe for the Kyosho super nitro cars which would likely have the correct offset but are a 12mm hex and would not be era correct. Check part number 3032.
Thanks for the information. It looks as though those wheels may have a different finish from what I currently have. More smooth unlike the rough finish of mine.
It may be worth a try though.
Re: RC10 RPM Ultramold
Posted: Tue May 06, 2025 11:47 pm
by Lavigna
Chewbacca wrote: ↑Tue May 06, 2025 9:48 am
WOW, just WOW
Now may I suggest the Losi Jrx2 Pro SE body for this build? I believe the ultramolded was actually intended for that body.
I have a beautiful painted Andy's Pro Arrow body that I'm going to see if it fits. If not, the SE body will be the choice.
Re: RC10 RPM Ultramold
Posted: Wed May 07, 2025 6:57 am
by MarkyDents
Stunning build as usual dude
I really do like the Pro Arrow idea, wasn’t there a Hot Bodies body for Losi that was out during the same time as the Stealth Fighter and Stealth Bomber for the RC10 that was sharp looking piece ?
I’m wracking my brain trying to think of the name of it….
Re: RC10 RPM Ultramold
Posted: Wed May 07, 2025 8:15 am
by jcwrks
The RPM 10T front spindles are a nice touch.
Re: RC10 RPM Ultramold
Posted: Wed May 07, 2025 1:15 pm
by Lavigna
jcwrks wrote: ↑Wed May 07, 2025 8:15 am
The RPM 10T front spindles are a nice touch.
Yeah, thanks. It's an upgrade to the upgrade.
Re: RC10 RPM Ultramold
Posted: Wed May 07, 2025 1:21 pm
by THEYTOOKMYTHUMB
Looks awesome. How do these compare weight-wise to a regular buggy? I would kinda guess lighter but it's kinda hard to imagine since I've only had experience with much smaller amounts of RPM material. Just curious.