That's what I'm going to do with mine. The GT on the rear and the trail to the front.
That makes sense because I've done 2 rears to 1 front, i might try a GT on the rear .
That's what I'm going to do with mine. The GT on the rear and the trail to the front.
Let us know how you get on with this combination, personally I'd go for grip over tyre life within reason (provided I get about 6000 miles or so out of a tyre)....GT on the rear and the trail to the front.

Can't see it being grippier as it has less soft compound and some hard compound, whilst the trail has more soft compound and no hard compound. The GT will only be as grippy on the outer edges, you might get to use those in the wet but many riders might not as several riders have posted they don't get to the edge on the GSA even with very spirited riding. Obviously someone needs to experiment and let us know as all this theorising may be a load of whatzits.I want as grippy as possible. .. I'm rightly or wrongly assuming the gt will be grippier overall with the 3 compounds. I'm about three quarters through my anakees so u have time to change my mind if there's enough discussion to change my mind!!![]()
I replaced the Tourance on my 2013 GS with PR4's, Trail front GT rear at 5K. Just done 2.5K round France and Northern Spain including several Col's. Bike now done 10.5K and back has maybe 500 mile left.
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Can't see it being grippier as it has less soft compound and some hard compound, whilst the trail has more soft compound and no hard compound. The GT will only be as grippy on the outer edges, you might get to use those in the wet but many riders might not as several riders have posted they don't get to the edge on the GSA even with very spirited riding. Obviously someone needs to experiment and let us know as all this theorising may be a load of whatzits.
Remember more grip and longer tyre life is like the holy grail, it may exist but I haven't seen it, although tyres have certainly improved in both aspects fairly recently.
It's certainly possible I got it wrong but I don't think so, mind you I am basing that on info from the picture in the following posts:-I think that you may have got your GT compounds and your Trail compounds the wrong way round JG?
No probs BatMan, I guess those looking for extra mileage are using the GT. Like you I go for grip every time, although the GS handles well in the dry with anything round and black it's in the wet that I notice the difference between different tyres the most (although most of my GS experience has been on the older hex head with narrower tyres)Whoops! Begging your pardon JG, I do apologies, you are absolutely spot on, in which case I agree that it does seem a bit pointless to fit a GT tyre instead of the 'Trail' to the GS.
I managed to fit a PR4 GT to mine,no problem with availability.
http://www.ebay.co.uk/itm/350992887033?_trksid=p2059210.m2749.l2649&ssPageName=STRK:MEBIDX:IT
Now THAT'S perverse.Yeah, Im not bothered about life, just as much grip as possible....
Shiny new PR4s fitted last weekend. Just did the maths: the front PR3 lasted for 12,600 miles with 2 rears (one PR3, one PR4). The rear PR4 lasted 5900 miles.
Both tyres changed would have lasted for some time in dry conditions but I erred on the side of caution as I may be riding in rain over the coming weeks & months so having some tread depth to disperse water seemed a sensible idea.
I am very happy with the grip/wear/price ratio of these tyres.
Just been out for a blast and scrubbed the PR 4 s in but couldn't quite get them scrubbed to the very edge at the back, anyone else found this or do I just have to try harder/go faster?