XRAY - Model racing cars

i have just won some of these of ebay these are the hexs you put on end of driveshafts before wheel fits onto them the problem is on the xray t3 2010 these are black but the ones i have won are silver with 1.5mm offset does this mean there are 1.5mm wider each side ? if so how will this effect the handling of my t3 ? also when using my set up guages will i have to say minus 1.5 degress each side to get my current setup settings ? thanks for any replys

If they are 1.5mm offset they should appear obviously wider than the kit items.

If so you can use them to tune the setup of the car.
The problem with changing the shims etc inboard and using the wide hexes is that you are changing the suspension geometry. You shouldn't use the hexes instead of shims, unless that's the setting you are trying to change.

All suspension alignment settings will stay constant when you change the hexes. No worries there.

Check page 12 of the T3 setup guide to find out the effects of track width adjustments.