Originally Posted by NutDriver
OK, I'll admit I'm a bonehead. I'll also admit that I'm lazy. I'm building a TC4 for USGT and I'm using 6mm offset HPI wheels. I'm having trouble getting the nuts tight and decided to put 5mm diameter washers between the nuts and the wheel (because the nutdriver won't get in there deep enough). Can someone share a more elegant solution?
The most elegant solution is to re-thread a 4mm/m4 locknut using an 8-32 tap tool. Make sure to re-thread the metal part of the nut and not the nylon/plastic locking ring. Here is a link on Harbor Freight for tool & die sets (http://www.harborfreight.com/catalog...ult?q=8-32+tap
You will now have to use a metric wheel wrench to attach the locknuts onto the wheels, but they work much better with the deep offset wheels. I bet if you ask around at your local track, someone has one of the silver cross shaped tools that come with every newer R/C car that uses metric wheel nuts.
Luckily I had another racer convert some metric wheel nuts to 8-32 threads for me. I am very happy with the end result as they are easier to install into deep offset wheels. Also I have not had any issues with the wheel nuts backing off.
Another DIY quick/free solution is the grind down or sand the outside diameter of the plastic wheel wrench that is included with every TC4 kit. I have used this as a solution in the past for deep offset wheels. You just have to be careful to not remove too much material on the tool and to carefully remove the wheel nut. It is easy to damage the plastic tool
You can buy replacement Associated #6956 Molded Tools for about $5 USD. Here is a link on TowerHobbies (http://www3.towerhobbies.com/cgi-bin...?&I=LX3496&P=7
Another option is to purchase offset wheels that don't have a deep "hole" where the wheel nut goes. (Note: The HPI Pre-mount "D" compound tires do have the deep "hole"). This is only an option if you are going to glue tires to wheels (which can be more expensive compared to pre-mounts).
Doing a quick search, it looks like the HPI Work Meister S1 Wheel doesn't have the deep hole for the wheel nut. They come in 3mm, 6mm, 9mm offset. Here is a link (http://www3.towerhobbies.com/cgi-bin...I+s1&search=Go
Another option that I've used in the past on a TC3 is the Racing Stock Car wheel. It comes in a 1mm offset, which would be good on a body that is narrow front/rear or a 190mm body. One benefit of the Stock Car wheel is that is a bit more durable/stiffer due to the design of the wheel. Here is a link (http://www3.towerhobbies.com/cgi-bin...?&I=LXKKV3&P=7
NOTE: HPI also sells Stock Car Wheels for their Vintage Tires. Make sure to buy the Stock Car Wheels for regular 1/10 touring car tires.
Speaking of HPI VIntage Tires, some racers actually use 26mm Vintage Wheels/Tires on their USGT cars. Many tracks only require any 26mm treaded tires in their USGT class and don't specify X-patterns. All of the vintage wheels easily use the stock nuts on the TC3/TC4. The 26mm vintage wheels only come in 0mm offset. Here is a link (http://www3.towerhobbies.com/cgi-bin...eels&search=Go
And finally, there is always the needlenose pliers solution. Obviously it isn't an elegant solution as you tend to scratch up the wheel nuts quickly and sometimes pinch your hand in the process of working on the wheels.
Hope this is an informative post.