Keep the stock tire if your doing a bobber.  The 150 will fit on a stock bike but to get that bobber look fender down low stick with the 140.

I fitted a Shinko 230   140/90-15 tire in place of the original ORC 140/80-15 tire   The taller tire does not rub anything and gives a softer ride than the original. Pretty happy with the result but may not be what you want

playhard67 wrote on 11/25/18 at 17:28:04:


Don't rule out the 130/90-15 size, as it is nearly identical in size to the original 140/80-15, and visually you won't see the difference.  When mounted it is just a few mm taller and 2-3 mm narrower.

You have a far better selection of tires in the 130/90-15 size.

Not handling, not miles per dollar, not traction in wet conditions,
But big whitewalls,,

 I bought those tires because I liked the whitewalls as well.

 The performance wasn't severely changed as my riding conditions are long straight open roads on dry surfaces, or off road for fun.  

 Cost was a non-issue, those tires are cheap enough and can be bought 4 at a time at a discount.