On buggie and truck style OFF ROAD vehicles I always USED "Rocket City" brand eyelet style "Hyme Joint" ends.
THEY work GREAT and address exactly what you are talking about.
At some point, the BALL CUPS got better, and with the lighter PAN CARS I race now, rarely do I ever have a ball cup get popped off.
I think in part, this is due to less movement, and more front end protection on the tires.
IF I was running something w/ exposed tires, or more travel, I'd be using the Eyelets on the outsides anyway...if I had a problem with just ONE ball cup popping off.
R/C Racing since 1985 ~ Santa Maria, CA (Central Coast)
2001-2012 - South-West Tour R/C Oval Series - R.I.P.
...will the SWT be revived? Time will tell, but we ARE returning to the VELODROME in 2016