The slicks and DOTs are all new. They have new casings and rubber mixes. The Power One A and Power Cup A retain the same shape with slight changes to the belt angle with new rubbers. The Power One V has been replaced by 2 tires The Power Cup VA and VB. They retain the shape of the V that is very aggressive. The tire wants to turn. The VA and VB Cups have had some casing changes to stiffen it under very heavy trail breaking. The VA is the softer of the 2. However do not think it will go away quickly I have guys running them with over 100 laps on them at race pace and they are still great. I have been using the VA more than the VB for everything except endurance and at tracks like Millers west course where front tire wear is excessive. I probably will not start using the VB until we get into the upper 80s and will keep using them at higher temps depending on the track. As we move into higher temps, endurance or on very abrasive tracks we move to the VB. The Power One and Power Cup rears differ quite a bit. They are a softer casing than the Power One tires especially the Power One A. The Power One A is a great tire for trackdays ( I run them on my R1 when I teach) they heat quickly ( I do not use tire warmers at trackdays) and they wear very well. I usually run them for 4 trackdays 4 hours each day before I change the rear ( I have to buy them too
)The B and C rears also work well and somewhat overlap with the C being more durable than the B but requiring the rider to get more heat into it. The Power Cup rears are A, B and C as they were with the Power One with A being the softest or lowest temp tire B and C overlap quite a bit with the C being more durable once again requiring more heat. Please realize that every rider is different and what works for you may not work for someone going slower or faster than you. A softer or lower temp tire can actually out last a harder or higher temp tire if it is run in the wrong conditions. If a tire is too hard or is not up to temp it will shed rubber where the softer tire that is correct for the temp will actually last longer and feel better as it is working. The Power Cups are available in the 120/70-17 front and rears in 180,190 and 200 sizes. The 180 and 190 are for 5.5 and 6 inch wheels where the 200 is for 6 to 6.5 inch wheels. DO NOT put a 200 on a 5.5 inch wheel.
There are not many of last years slicks still around other than the 18/67-17 in the 1847 compound. These are very good tires and if you want to go to slicks without having to make very large adjustments ( you will probably still have to make some but smaller) to run a 190 are a good deal, they are a medium compound. The Power Slicks are also completely new with 2 fronts, A and B and 3 rears A, B and C. Once again the fronts were changed to trail break at very high loads. The rears have been changed to a lighter casing with different rubbers once again. The A front is durable and lasts where the B is more durable with comparable grip at higher temps. This past weekend at Miller on the west course which is the most abrasive place I go Clint Warner put 45 laps at race pace on the tires and they are beautiful, you can see photos of them if you are on face book at
http://www.facebook.com/Islandracingservices I would have run the A front just about anywhere else. Many guys who have run other brands in the past are using the Power One and Power Cup A compounds as the VA and VB are so aggressive on turn in. If you are running something other than the Power One V you might consider these fronts. If you have been running the Power One V you will want to go to the VA or VB front. The Power Ones have been reduced in price as they have been replaced. Bob has some of them at very good pricing. Many of my riders are running the VA with The discontinued Power One rears to save about $60.00 or so dollars on the set. The Power One won several championships last year. This is long winded and I am sure I have not answered all the questions. Please post up your questions or contact me at
david@islandracingservices.com you can also call me at 409-771-3950 If you are interested in purchasing the tires Bob has a good stock and if he does not have what you want we fix it.
Thanks,
David