Not real sure. I know i lost about 5 mph on the top end. And its about 51" wide with the itp wheels on. One nice thing is the side walls don't flex or roll like the terrathons in the corners.

I'm always trying some thing different.

 

i checked on the tire weights and found this after checking several different sights. grim reapers 26x9x14-28lbs 26x9x14-24lbs . maxxis bighorn 2.0 26x11x14-27 lbs 26x9x14-21 lbs so not a whole lot of difference ,as for top speed on my bike I don't know what it was before and don't know what it is now, not that important to me.