Continental Grand Prix 4-Seasons

They have a very soft rubber compound on the 4-seasons tyre which gives them ,

1. quite a lot of grip
2. a short life (wear out quicker than other harder rubber compounds)
3. a sponge like tendancy for foreign objects whilst still having a good inner belt to avoid those objects going all the way through at any more or less rate than one of Conti's other semi-protected tyres (e.g. Conti 4000)
4. a slightly soft or dead feel which is sometimes interpretted as being slower than a similar tyre

I think most of the comments are addressed by the softness of the rubber.

As to the rear verses the front, I suspect if you have a hover-like tyre picking up the debris on the front, and the rear follows the exact line of the front 75% of the time, then there's that answered?

Just measure my 25mm Conti 4 Seasons on a Hunt wheel with 17mm internal width and they're a knat's pube under 27 mm. I find that odd given they look more like a 24mm compared with my Grandprix GT on my summer bike.

I ran 28mm gp4s over mid 2015 to mid 2016 in Scotland, puncture resistance was OK, particularly when new, but I still got a fair few January punctures (both pinch and object). Grip is good, ice still a mono. Longevity was OK, they did about 5000 miles before really being dead (lots of cuts, becoming more puncture prone).

I am currently running schwalbe s-one tubeless and liking it ALOT. Maybe try them?

Tyre width depends on the width of the rims you're putting them on.

Continental are liars too. 28mm? No, they came up 26mm. To make them appear lighter than rivals, I'd say.

Always found tyres from Continental over-rated.

Michelin shit on them and are always on offer somewhere too. Win-win.

I've had a few pairs in 25C for winter duty.

They're good in terms of grip in cold and wet conditions, but obviously not impervious to ice.

Road feel is OK for that kind of tyre but I did find them a little slow. Punctureproofing is OK but nothing spectacular.

I'm trying Conti Grand Sport GTs now instead, which sacrifice the cold-weather grip compound but a much nicer-riding, and faster.

To this day I can't really explain it. They were in the sale, so maybe a bad batch. I have a mate who swears by them as it happens, so they can't be all bad.

I quite liked the Schwalbe Durano plusses. You could ride over anything, however that came at the cost of weight. I suspect if someone is looking for a spritely ride, these aren't really the tyre. 

I ran them for a year commuting. Puncture resistance was OK, but they disintegrated after a bit less than 12 months. The tread came off in lumps, like chewing gum. Considering the premium price, I wasn't that impressed.

Now running Pro4 endurance, which seem to be lasting better with similar puncture protection and speed.