In some pictures such as these:
http://www.fprado.com/armorsite/Tiger1-2002-Picz/Tiger1-131-Bovington-2004.jpg http://upload.wikimedia.org/wikipedia/commons/e/e2/Zhukov_at_the_Tiger_tank.jpg http://upload.wikimedia.org/wikipedia/commons/2/27/Bundesarchiv_Bild_101I-299-1805-12,_Nordfrankreich,Panzer_VI(Tiger_I).jpg
The wheel arrangement has the wheels set so the frontmost roadwheel is exposed, the next recessed and so on so forth.
Whereas other pictures such as these:
http://www.worldwar2aces.com/tiger-tank/tiger-tank-images/tiger-tank-07.jpg http://www.worldwar2aces.com/tiger-tank/tiger-tank-images/tiger-tank-28.jpg
Have the wheel arrangement being recessed, exposed, recessed, exposed and so on.
Were there design modifications that changed the wheel arrangement or was it just due to field modifications or simply lack of wheel doctrine in manufacture or repair?
If I'm not mistaken, the main difference between the first set and the second is that the first are rubber rimmed wheels while the second are the steel ones. Basically, different wheelset used which in turn had a different setup with how it was staggered.
It was certainly a design modification.