Hi Col
the CR had a normal 21' knobby , Both bike's are destined to do some MX as well I believe,
My bike in the back ground, I found the XT a handful as it has a particularly nasty back tyre which gave
terrible feed back as to what it was doing, sliding on roll off and straightening up under power?
the CZ on the other hand was a joy, could have used another gear on the long straight and the jetting
at wide open throttle was a little off but had great drive and predicable to ride. At the end of the day I managed
a second place in a pre78 unlimited race
Cheers
Noel