Hello from the U.k.
Welcome ...
Welcome aboard - and to get an answer to your question you'll need to do some investigation.
There are two different front struts available, one of them has the spring chair or pan welded higher up on the strut tube than the other one - so you need to grab a measuring tape and measure the distance between the bottom end of the strut tube and the pan weld - there is a thread called "strut data" in the suspension section of the forum with pictures - the low pan strut measures approximately 245mm, the high pan strut approx. 265mm.
We also don't know what size rims you have - most of us have 16" rims, but I believe 17 & 18 were also available in the UK.
if you have a Pinin, you probably have the lower pan strut, assuming 16" rims, the largest tire you'll get in there is probably a 215/70R16.
Which of the Yoks is it?
The Geolandar AT seems to be a decent tire - we have them on a Suzuki Escudo - they seem to have decent traction, both yet & dry, we've had them just about a year, so I can't comment on tread life.
The Dunlop GrandTrek AT3 is also available in a 215/70R16, that's what I'm running on my iO right now - they seem to be fine on the iO, but wet road traction is disappointing on the Suzuki.
welcome
Welcome to the forum....
Happy io
My io is now SOLD Thankshttp://pajerio.com/forum/claudes-io-2002-zr-built-thread-onlyhappy-io