I’ve been thinking about putting a wider tire on my 09 SF and I’ve read on here that a few people fit 150s. If anyone is running a 150 width tire and has a pic or two to post I would appreciate it. Thanks

 

I have a 140 on my 250s. Asumeing the s and sf have same swingarm I think you would be crowding it a bit to put a 150 on an sf and definatly would be too big for a 250s (swingarm gets wider as it extends back so there would be slightly more room for the smaller tire)

 

Not only that, but more rotating unsprung weight along with slower heavier handling (not a lot, but some) due to the leverage factor and larger diameter of the wider tire. Anything bigger than a 140 is probably a waste and will detract from performance. Honestly I'm thinking a 130 would even be better, but it wouldn't look as cool and there are probably few good radials in that size. After all, the really wide tire is more about looks than performance in most cases. If I ever do a set of SM wheels for the KLX650 it will be a 140, 110 combination, because of performance rather than looks.

I'm pushing around a 420 lb street bike with a 140 on the back and never lacked for traction. It would be neat to have a 150 or 160 on the back, but I won't do it. I'll take the performance advantage of the lighter tire.

 

Oh man! If you had posted this Friday night or yesterday morning, I could've taken some pics for you.
I took my D-Tracker ti the dealer for the 6000km service and saw another D-Tracker fitted with Dunlops 150 and 120. It had the stock wheels. I checked the rear tire and there was no sign of marks from the chain.
I am considering a 140 replacement when the time comes.