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I used the wider front end, it makes a drastic change in the handling. The car is more stable and you can throw it into a corner quicker and get out of a corner quicker. Longer Ujs yes, but worth the upgrade. I used 7.5 degree front castor blocks but they are not available anymore so if you can get 7 then that will be more than enough for you.

Hi Rob, I just wanted to update this thread on your ZX. Is there any chance you might have pics of the uni's you used for this car?

Mr. ED wrote:

Bullfrog wrote:... I've also got Lazer ZX5 Universal shafts as well in it, front (62.5mm) and Rear (65.5mm). Cheers Bullfrog

Just so no one get's the wrong ones: the 62.5mm CVD's are ultima RB5's , not lazer zx5's

Guys, I'm told Lazer ZX-5 CVDs will work in the normal Optima/Turbo/Javelin (i.e. non-Mid), however I have discovered (as has been discussed here) that there are different lengths of CVD's, 62.5mm and 65.5mm. I'm guessing the 62.5mm units are a near-perfect swap for the stock Optima dogbones & shafts?

Not sure, but I believe there are 4 lengths for the new Kyosho cars. 60.5, 62.5, 65.5, 68(?). Then there are three different axle lengths (there is actually a fourth, but it is an axle/adapter used for B4 style wheels). -no groove, 2 grooves, 3 grooves- each getting 1mm longer, with according grooves on the axle (2 grooves = 2mm longer than standard, 3 grooves etc.). This should cover most of your Kyosho needs. -Jeff

Jay Dub wrote:Not sure, but I believe there are 4 lengths for the new Kyosho cars. 60.5, 62.5, 65.5, 68(?). Then there are three different axle lengths (there is actually a fourth, but it is an axle/adapter used for B4 style wheels). -no groove, 2 grooves, 3 grooves- each getting 1mm longer, with according grooves on the axle (2 grooves = 2mm longer than standard, 3 grooves etc.). This should cover most of your Kyosho needs. -Jeff

actually there is an 73mm also ...........

mvh isobarik

73mm...That should be for the truck version of the RB5 then.
Could be good to use on a works 91 front. Thanks for the dimension!