Will new tires effect speedo?

OK, I'm new to this forum and to modding my 2001 X Sport so please bear with my simple questions. I just replaced the stock 235/70R16 tires with 255/70R16. Will this effect my speedo? As I've read through the forums I've seen a couple of people have change their 19 tooth speedo gear to a 20 tooth gear, but I'm not sure what size tires they upgraded to. Any suggestions? Also, where is the best place in the forums to ask a brake question? Thanks.

 

[Texplorer]

Welcome to the site, the change will effect the speedo but since you didnt change that much it will only be off by a couple mph.

 

[zenking]

Good. That's kind of what I expected, but just wanted to be sure. Thanks.