17mm hex

[Finnster]

The only problem with the onfa nuts adapters are that the steel threads of the axle cut into the alu hex adapter, and after time create a bit of wobble as the axle hole get enlarged. The Maximizers work well also, just they use normal 5mm nuts. Both work well if you know what the complaints are. I've used both.

I actually made a fix to my Ofna adapters. I took a section of the 6mm red TRX pushrods, drilled them out further, and then threaded them w/ a 5mm tap. Cut them into a small section and threaded them onto the Revo axle. I then drilled out the Ofna adapter to approx 6mm all the way thru (only half is 6mm, the rest is ~5mm to rest on threads of axle.) I used a SAE bit that was very close to 6mm.

Never got to really test it out as the revo is collecting dust. It should work as a great fix to wobbly ofna adapters if you have them.

In the end I do slightly prefer the Ofna adapters as its a 17mm hex nut. Maximizers work very well too tho.