While the a050 semi-slicks are the most expensive tires I have purchased, I have no regrets about the investment. I use them as daily driving tires, and I anticipate they will last approximately 5000 km at the front and 7000 km at the rear, given my driving style, which includes a front-wheel drive car.

Having been upgraded from Hankook Ventus TD, I have found the a050 tires to be superb. While I do not expect exceptional wet grip from semi-slicks, they consistently perform well on dry ground.

In terms of tire noise, the a050's soft compound provides a pleasant surprise. The noise level is not as high as I had anticipated, making for a more enjoyable driving experience. Overall, the a050 semi-slicks have exceeded my expectations, and I highly recommend them.

This is the fastest Yokohama tires except for slicks. There are 5 different compounds but I've seen only 3 of these compounds laying around in tire shops(G/2S, G/S, M). Also, I usually see only 2 of them on the tracks(G/S and M). Time attack guys mostly use the G/S. I'm more of an time attack guy and I've tried G/S and M (and nothing else).

M compound was disappointing. It doesn't feel any grippier than A052 and the laptime was also pretty similar to A052. Hence, I've never looked back after that. G/S is about 1% faster than A052, regardless of tracks. However, it has a very narrow window of peak performance. Which means you only got one shot or maximum two shots per session, because you won't be able to get the same time even if you do one or two cooling laps.

These tires come in different compounds. If you get Medium compound "M", the wear is better, but wet grip suffers (forget it if it is wet and cold!!!). "G/2S" compound works better in wet, wear is the trade off, BIG time. Probably because I would push harder in these tires.
There is also a G/S compound which is somewhere between the two, but I have not tried it.
If you are looking for good wear and only use them in dry (warm/hot) weather, there is a MH compound (which stands for medium-hard, i think) similar to the "LTS" compound made for Lotus, this would be the one to think about.
I would still prefer Bridgestone RE-11S (WS2 compound) which has grip from cold and holds MUCH better than Yokohama A050. You have to like the feel of a harder sidewall though. Wear is of course proportionately worse....
Happy motoring!

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I'm very happy with comfort, I didn't expect soo much form tires of this kind. Driving feeling is special, much different from regular tires, I don't know how to describe but it's really nice how predict the handling can be if the car is tuned properly, If you suspension can't handle so much grip as these tires offer, then these tires can't do their job at their best..
Dry grip is just breathtaking!

Tires are still so sticky even if they're old, they pick-up every last piece on the ground, it's kinda frustrating if you run car without inner fender guards.

As for the bad thing, I don't recommend them for wet surfaces at all. Tire wear is very high, they have have very limited life, but hey this is perfectly normal, if the tire have superb grip on dry surfaces they fade away fast! I still rather run tires that are used to be driving hard and gives u the best performance than tires with "400 tread wear" and you unmount them before they even worn-out because they're getting old and rubber became hard that means bad tire.

Best rspec radial by a long way

Used on track only so not sure how they are on the road

Benefits
Unbelievable feel
Massive grip from cold
Easilly 1 second / 60 sec lap quicker than any other rspecs.
Grip consistent till completely worn.

Disadvantages
Price
Very high wear rate ( well you are going allot quicker )

For outright speed / race / time attack there is no better tire.

For track days / supersprint and road use .. Achillies 123s is a better tire