I have seen quite a few pictures of street bobs fitted with 180 and 200 tires. I know the 180 can be done on a standard rim but what size wheel/rim will I need to fit a 200? Is there anything else that I will need to do to do this mod other than the turn signal wiring. Do I need any spacers or anything? Finally will a 200 go under the stock fender?

 

I have a 190mm tire on my 06 Street Bob. It was and still is a pain in the a** to take the rear tire off the bike and also to reinstall. The Dyna frames were changed in 2009 and I don't think it will be hard for you to get a 200 tucked in under that fender. I have my 190 mounted on a 6.25" x 17" rim. The wiring is still run in the rubber channel on the underside of the fender.
The way I did mine was to get the rim and put the bike up on a jack so that it was stable. I then just started adding the parts on the rim, i.e. brake rotor and belt pulley and the wheel spacers. If all of those things fit and there is still room for the nut on the axle, your good to go. Check to make sure the valve stem will clear the brake caliper as I had to grind a groove in my caliper for the shortened valve stem to clear. One of the most depressing sounds after that mod is PSSSSSSSSSSSS...
BTW I didn't have to mod my fender at all...It was wide enough.
My rear tires have been sport bike tires and they, so far, haven't grown in height at high speed.

 

200s come in several flavors for different rim widths. I'm running a Cobra 200/60-16 on a 5.5" rim. That is the recommended rim width for that tire. It's a helluva tight fit in my 99 swingarm and a total no-go with the fender and struts. The newer frames and fenders are wider, tho.

 

What year bob?

18x5.5 with a 200 looks great. Super tight but is no problem on newer Dynas

One day I'll have a 200 or a 180/190 on my bike. Depends how much of the twisties I want to give up for a look


Sure looks good on a filled fender that's been radius'd

 

There are numerous threads on this subject here, fitting a 200 on a 5.5 or 6" rim is not a huge project. Someone above mentioned a frame change in 2009... I'm not aware of that, pretty sure the frames from 2006 to current in the dynas have stayed the same. Wide glides are a touch wider between the struts I believe.
200's are a tight fit but do fit, look great and don't affect handling at all, if anything I feel mine is better on the road with it

 

I have a 2014 Bob. Thanks for your reply