the cen has comparatively skinny axles, therefore hexes designed for other trucks tend to have too large a hole thru them, this can lead to probs thru the hex not centring properly on the driveshaft, which in turn can cause damage further down the drivetrain.

i have heard of people using the tmaxx hexes on the cen, and getting away with it, im a bit dubious as to the long term effects of that on the drivetrain tho. u pays yer money and takes yer chance i guess... i just didnt want to recommend anything to others that might not work out right. especially those of us who have bigger/pokier engines and are having enough problems with the extra power as it is.

hope that makes sense

oh nearly forgot - those hexes u linked to will have a too large a hole for an ideal fit on a cen, also u may have probs with the pins not fitting in the axles - not sure on that point tho. what u will definately have probs with is the 10mm thickness of them - this will leave only a few threads to get ur wheel nut onto, and it certainly wont locate the threads on the nylon part of the nut.

the cen driveshafts are the biggest prob with mounting tmaxx wheels, as the shafts are so skinny. i have been trying to get some info on [link=http://www2.towerhobbies.com/cgi-bin/wti0001p?&I=LXGPE8&P=7]these[/link] shafts, if i could get some dimensions of the shaft i could see if they would fit the cen - its gonna be close - these would allow a thicker stub shaft to be used, which would in turn open up other hex options. i will post my findings on here if anything comes of it.