I have purchased two 4WD1 kits from one of your suppliers (Jameco), shortly before they became a discontinued product. I put them aside in the hopes of one day having the time to build them. I started putting them together just the other day with terrible results from the PRO-LINE hubs/tires and the HUB05 connectors. The tires were glued and assembled by my local hobby store since I wanted to be sure they were done correctly. However, when I mounted them to the HUB05 I get terrible results. The tires wobble, and are not seating correctly within the two machined (for lack of better explaination ‘pins’) on the HUB05’s. My local hobby shop owner said that it appeared to him that the HUB05 was designed for an older style PRO-LINE hub that has been discontinued for almost 2 years. Is there anything that can be done to end up with tires that are ‘true’ and not wobbly and unevenly mounted? Thank you for your assistance.
Yes Proline discontinued the hubs, that’s why we created the HUB-12 that fits any 12mm hex pattern rim. I admit that the hubs were difficult to assemble onto the rims, but it never resulted in a wobbly assembly. I could probably be more help if I could see the assembly. To make matters worse there is no 12mm hex pattern rim that fits the narrower tires that the 4WD1 used. That’s the reason we gave up on the 4WD1. I tried for weeks to find a workable solution.
Thank you for your reply. Well for lack of me being able to take any pictures of my tire problem, maybe I can elaborate on it a bit more. I tried to mount the tires to the HUB-05’s using just the standard hardware. The result is that the machine screw that attaches the rim to the HUB-05 isn’t a tight fit into the plastic rim. This allows the rim to shift either to the left or the right in the keyway on the HUB-05, when the machine screw is tightened. This is occurring because the keyway on the HUB-05 is much smaller than the slot in the Pro-Line rims. This is what is resulting in the wobbling since the tire is higher on one end and lower on the other end. It’s sort of like a tire that is out of round. Any ideas? Again, thanks for your response I appreciate it.
But it is… Did you install the hub’s onto the motors before you installed the tires onto the hubs? If so it’s possible that the motor shaft prevented the screw from being tightened down all the way. There is no reason the screw can’t tighten down completely onto the rim.
Ug… I need a picture.
The hub fits snugly into the backside of the rim. Install the screw and tighten it down completely. It is a very tight and true assembly.
Yes, I installed the HUB-05’s to the motor shafts first, followed by the rim/tires. I can’t see an easy way to mount the HUB-05’s to the rims first then mount them the the motor shafts. If I am reading your post correctly, am I to mount the rim/tires to the HUB-05’s first, then mount the HUB-05/RIM/TIRE assembly to the motor shaft? If this is the case I’m not certain I can get an allen wrench within the space between the lexan panel and the HUB-05 to tighten it. I’m really becoming confused ATM. On a side note, the foam inserts that come with the PROLINE tires in the kit, do they require trimming before being inserted into the rim/tires? I read the assembly guide which suggested to do this, but the inserts themselves seemed to fit normally with no bulging. The hobby shop that assembled the tire/rims for me said not to worry about it, but I don’t want this to create future problems if the trimming is necessary. Thank you again for your quick replies, I have so much invested in these two kits, and I would hate to have to scrap them.
Well you can thread the screw that holds the rim to a hub in without the rim, then install the hub on the motor shaft and measure where it needs to be when you tighten it down. The screw serves as a depth gauge to make sure you do not put the hub too far onto the motor shaft. Remove the screw from that hub so you can put its rim/tire on. Now put the remaining 3 hubs on their motor shafts at the same position as the first and install all of the rims/tires.
Well there’s your problem… The motor shaft is preventing the screw from being tightened down all the way.
Now would I tell you to do something that is impossible? If you use a rounded end hex driver it will fit nicely in between the tire and lexan panel. Don’t make me take another picture!
No it’s not necessary. We grabbed the information directly from the manufacturer page and posted it without changes. We should have made it robot product specific in hindsight.
I see what you are saying Eddie, but the truth is, it’s actually easier than that. If the original instructions are followed it tells you to attach the rim to the hub, then put the hub on the motor shaft, tighten the set screw till it touches the flat, then slide the assembly toward the motor till the set screw hits the end of the flat. Then tighten the set screw down fully. This works perfectly. The only way I can see the problem described is if a longer screw was used, or if the hub was pushed up to the motor body and tightened (not on the flat).
Thank you Jim and EddieB for all your assistance, I really appreciate it! It’s nice to know that I don’t have to toss these two kits out and start over again. I’ve done so much planning for them and spent so much money on sensors and such. It would have been a terrible set back for me. Thanks again!
To make matters worse there is no 12mm hex pattern rim that fits the narrower tires that the 4WD1 used. That’s the reason we gave up on the 4WD1. I tried for weeks to find a workable solution.
If you use a rounded end hex driver it will fit nicely in between the tire and lexan panel. Don’t make me take another picture! 
