Modern Triumph caters for all from sports bikes to cruisers, bobbers, to cafe style to just a stock Bonnie, the SM is a cruiser and caters for that market, as for the fake carbs I don't look at them while riding and I do ride my Thruxton, can jump on it anytime and travel long distant without any problems at all and have done it many of times at short notice, throw my saddle bags over the rear seat with my gear on and off I go, have done many 15hr long rides in the saddle on my old AC Thruxton and on my WC Thruxton and all I do is change the oil and chain maintenance, coming up to 6 years on my Thruxton 1200 S and 30k on the clock and haven't even looked at the valves yet. (I would have a lot more mileage on it but covid and lock downs stopped a lot of my travels)
I have owned my 850 Norton for 47 years now and I did a lot of traveling on it over that time but a lot more maintenance needed for doing that, but the Thruxton is so much smoother on the road and that helps for long distant travels and the smoothness of that big 1200 motor no matter what revs or speed you do its always on hand when needed and it will do it all day and night long.
As for the older Triumphs I brought a new 81 650 Triumph Thunderbird same size bore as the 750 Bonnies but shorter stroke and single Amal carb, it was a very smooth bike to ride and in 9 years of ownership I clocked up 250k kms on that bike and when the wife came along we did a lot of long distant travels on it visiting friends who moved away, with the shorter stroke it was pretty quick and a lot quicker than the 750 Bonnies, the biggest mistake I ever made was selling that bike, 250k on it before I did a top end rebuild before I sold it, we learn by our mistakes.
Back on the subject the Speed Master is a cruiser, not my style of Triumph but its made for the market and what some like to ride and cruise around on, same as all of Triumph models they cater to the market and they been around a long time now, they are a popular motorcycle, are very reliable and they sell.
If you think the SM has big tyres have a look at the tyres on the Rocket 3, such a big motorcycle and one of my mates brought a new one and for its size and power it handles pretty good and is pretty nimble in the twisties.
I am a true Norton man but I also love my modern Triumph and my Norton everyday duties has been taken over by the Thruxton, I am not interested in any other Triumph model as I always wanted a Thruxton from the first day they came on the market, but it was 2013 when I bit the bullet and brought my 900 Thruxton and said it be the last new bike I ever buy, well till the 1200 came out and is the first bike I ever owned with a 270 swing crank and the Thruxton with the lighter crank, I just love it and gets me into a lot of trouble.
Its easy to judge a bike without owning one but until you ridden or owned one is another thing and I thought the same thing owning a 270 swing motorcycle just wasn't thought of till I rode one and put a deposit straight down on the 1200 S (old new stock at a heavily reduce price) and the S model was better suited for my long distant travels compared to the R model.
Ashley