I posted this in my local section but thought I'd add it here for those that were thinking of doing this. I bought a tire groover from ebay for about $68 shipped, came with 12 replacement blades.
I stayed after work a few weeks ago to groove and sipe my tires. Total time to do all 4 tires is about 2 hours. If I could of found a more steady way to hold the tire other than just leaning it against the wall it would have saved some time. The tires are a little quieter and it feels like less steering effort is need when turning in parking lots at slow speed. I'll be testing them this weekend in the snow which is the main reason I did this as I wasn't having any issues on or off road with the tires. I may add a groove to the blocks that are just siped depending on how this weekend goes.
This is how the tire started out.
Final product. Grooved the large tread blocks and siped the smaller ones.
I stayed after work a few weeks ago to groove and sipe my tires. Total time to do all 4 tires is about 2 hours. If I could of found a more steady way to hold the tire other than just leaning it against the wall it would have saved some time. The tires are a little quieter and it feels like less steering effort is need when turning in parking lots at slow speed. I'll be testing them this weekend in the snow which is the main reason I did this as I wasn't having any issues on or off road with the tires. I may add a groove to the blocks that are just siped depending on how this weekend goes.
This is how the tire started out.

Final product. Grooved the large tread blocks and siped the smaller ones.
