If you are going to change the tire size, you're going to need a programmer to fix the speedometer error.
The nice thing about the programmers is that you can change the programming back to stock easily.
Here is a link to several programmers for the H2:
http://www.lildevilmotorsports.com/c...=22_533_49_191
I have the DiabloSport Predator Flash Tuner:
http://www.lildevilmotorsports.com/catalog/product_info.php?cPath=22_533_49_191&products_id=1 77
Klaus
Rare 2003 H2 with UM8 Integrated Navigation Radio
Skull & Bones Member since 2003