can anyone tell me what the rake is on stock triple trees for my 08 street bob?

 

Should be 0 deg. Low Riders are 1.5 deg and Wide Glides are 2 deg.

 

do i have to get different forks if i get a 3 or 5 degree rake?

 

The factory overall rake on the Street Bob is 29 degrees. You will need to find out what your trail is now and what a raked tree will do to that measurement. You need a minimum of 2" trail, when you get closer to 4" it will like to go straight, but turn like a cement truck, less then 2" and you will get a bad wobble at higher speeds.

 

thanks for the info, i will see what i have to do to figure that out.

 

You could start here:http://www.rbracing-rsr.com/rakeandtrail.html

 

the stock rake is 29 i just put a new tree on mine and added 5 degress so now i have a 34 degree rake which is what wide glide come stock

 

The total degrees may be the same, but the neck angle of the wide glide has the right geometry to give you correct trail, where adding a raked neck to a different neck angel, the geometry is not the same and you may not have correct trail.

 

If i add a 5 degree tree to my street bob use a 21 in tire add 2 in down tubes would it not make the trail back to stock or close

 

I have 5 degree trees. Stock tubes. Just make sure you get your neck bearing tighter than normal...
Check out this site.
http://www.rbracing-rsr.com/rakeandtrail.html