Question, Which One?

For me the only way you can make your choice is to test ride them both, even if that means you have to travel to do it.

 

That is a shame. You would think that if he wants a sale he would give you the chance to ride them.

 

You really have to find a dealer who has a secondhand model and go and test ride that.
I would think that you will be rather cramped on the Street Twin, the seat is low and therefore the distance from seat to footpegs is closer. I have just changed bikes to a Street Twin specifically because it is small with a low seat height, but I am only 5' 6" and it fits me fine.

 

Sounds like a straight Bonneville fits the bill unless you're looking at doing a bit of trail riding. Then the answer is obvious.

As far as power goes, better to have and not need than to need and not have. 1200cc all the way. FYI- AFAIK Speed Twins are still significantly lighter than Streets. Speed Twin leg position lends itself to taller riders too as your knees are bent at a slightly smaller angle.

…But then I'm probably biased here.

 

Martylaa
A dealer that won't let you test a bike would not be getting any business of me. They are specifically supplied test machines from Triumph that are specifically for that purpose. I would rather travel a couple of hundred mile than waste my time with a jobs worth.
Joe

 

Martylaa.
No its not. I have many bikes over the last forty odd years. And never once been refused a test ride. I do know you have to have had your licence for i think over two years. But if someone want to buy a bike then just to sit on it is acceptable. If they are a Triumph dealer then i would certainly be having a moan at Triumph UK.
Joe

 

@Martylaa
Good luck finding someplace to at least sit on the bikes you're looking at and perhaps even figuring out how to get in some test rides. I was wondering whether you'd considered the Speed Twin? I'm far from 6'1" (I'm 5'7") and though I've not ridden the Street Twin or the Speed Twin, I've sat on both several times at my dealership and the Speed Twin definitely feels taller to me. I haven't look at the specs but just thought I'd throw my observation in the ring.

 

I think the Street Twin is an ideal second bike because I have one! Well, mine is a converted Street Cup but the riding position and height is the same. I am 6ft with a 34” inside leg and find the position just right for up to 2 hours of continuous riding.

Similarly the T100, Scrambler, Speed Triple and more expensive Speed Twin should suit your height.