3:90 rear
 

Anyone running these? and if soo are they the ones from pro shifter? Would like to know what the idle is at 75 in fifth. thanks,joe

Re: 3:90 rear
 

First, its Pro 5.0. Second, if you are going 75 in 5th, its not idle. I'm not trying to be an ass, just FYI.

If I had to guess, with a 26" tire, you would be right near 2550 (somewhere between the 3.73's and 4.10's).

well exuse me--what rpm range would i be in.
not the sharpest tool in the shed after a day at work.sorry
but thank you non the less

I really wasnt trying to be an ass. i came up with that number using this sites calculator. I just took the RPM for 75 with 3.73's and 4.10's and averaged it, since the 3.90's are pretty close to between the two. The 2550 rpm I posted above might be off a little, and it could vary depending on the size of tire you are running, but it should be pretty close.