My history for rear flats is appalling. This is my latest attempt at mitigation..
It has turned out quite well. 2100 miles w no rear flats. This is very good for me and includes removing a staple from the rear tread after one ride wo a problem.
On the downside I blew out a front at 500 miles w a sidewall cut.
Now riding w Michelin Power Protection on the front (always been good on the front) and Conti 4-Season on the rear and having very good results. I do 100 mile rides (3 last week) so tire reliability is a big deal for me.
It's not scientific, but I haven't ever had better results.
I have been road biking for many years, completing many centuries. I get more miles out of this tire than any other I have tried. I have less flats, too. The grip is good on wet pavement and cornering is excellent. Great traction. I use the 25's.
These tires are great for training. They wear very well and handle in good and bad weather. I usually get 3 years out of a set of Continental tires. I average 12 thousand miles a year. I'm a light rider weighing between 128 and 130 lbs. The last set I went 3 years without a single flat. A lot of the roads in southwestern Ohio and Indiana are not the greatest either.
I highly recommend these tires.
I've used Continental 4 Seasons for several years on my road bike (Lynskey R360). I have rarely had a flat. Are they the lowest rolling resistance tires out there, no they are not but they are stable and will take a lot of abuse. I like the black edition because it looks good on my titanium frame.
Continental has always made great tires for tandems. The only problem I noted in the past has been with the brown colored side walls on some tire. It seems that UV light would break down the sidewall fibers causing them to break prematurely. These Continental Grand Prix 4-Season Special Edition Black has eliminated this problem by covering the side walls with a black rubber coating. I also find that when using the 28 and 32mm tires on regular width rims allows for a round tread profile. This offers good straight line and cornering stability.
I bought these on sale and put both on my road bike. In almost 5,000 miles I only got 2 or 3 flats Before the rear needed replacing. The front lasted a bit longer, but soon needed replacing, too. Definitely great flat protection and long wear-especially for the sale price.
My main concern with tires is flats. I just don't want to deal with them. So for years I used Schwable Marathon Plus 32mm tires on my Salsa La Cruz. I use the bike for commuting into Portland (55 miles round trip) and for touring (a few tours each summer of about 300 miles each). I knew the Schwalbes were heavy but didn't care since I never got flats. That is, unless the 95 mile mark in the 2018 Oregon Gran Fondo. It turns out that the inside of the tire casing was defective and a little wire from the casing was poking into the inner tube. I suspect it wasn't an issue before because I typically ran the tires a bit low, but on the day of the Gran Fondo, I pumped them up to the max PSI. It was really a pain to fix (I had to use a worn piece of gravel to grind the frayed wire down and still ended up pumping the tire up to the minimum inflation to complete the ride). After that mess, I swore I'd switch to a folding tire.
I looked around for a folding tire with similar puncture resistance and came upon the Grand Prix 4-season. I have over 3,000 miles on them and have just reached the point where I need to replace the rear tire (trust be told I probably should have replaced it about 500 miles ago). The front will probably be good for another thousand miles or so. And so far, ZERO FLATS! As a side benefit, they are much lighter than the Schwalbes and it's very noticeable. The bike is much snappier from a standstill and much faster on the steeper (and longer) hills.
I have a set of these on my Lynskey Helix, on which I've been doing an 11-mile urban commute. I have a 28 on the back, 25 on the front. So far, these have been great. They're showing minimal wear, I've had zero flats, they seem to hold pressure pretty well. They feel fine to ride on - it's true what they say about wider tires giving a smoother ride and not adding to the overall effort. They were easy to put on. Feels like I have good feel, good control, tight in the turns. Two thumbs up.
When I got my new Trek Domane, it came with 32s which I just wasn't ready to go to. I had always run Continental GP 4000S IIs - 23s or 25s, and I saw they made 28s in that tire also, so I got those. I loved the softness of the wider tire and lower air pressure, but I got 4 flats within 200 miles. All goatheads. I lost confidence in the ability of those tires to fend off a couple teeny tiny goatheads, so I went with these 4 Seasons. So far, 300 more miles on the same roads, zero flats. They are a hair stiffer, but I'll take the stronger durability. The black edition was a little splurge but does look better with my partly black bike.