May 7th, 2017, 05:06 PM | #1 |
CCS Amateur #501
Name: Dave
Location: Iowa
Join Date: Jun 2015 Motorcycle(s): '09 250 SE 'Booger' Posts: 406
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Race Tires 2017
Whatcha usin? Whats winning? Im gonna have to change out my S20 evo's after another weekend or two.
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May 8th, 2017, 06:31 AM | #2 |
Track Clown
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May 8th, 2017, 08:58 AM | #3 |
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Tomahawks
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May 8th, 2017, 03:09 PM | #4 |
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^^^^ camouflage is specifically designed so the corner worker won't see your off track excursion
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May 8th, 2017, 04:40 PM | #5 |
ninjette.org member
Name: Greg
Location: San Antonio
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Tires
I've been using the Dunlop Alphas, although I sometimes run the Michelin front with an Alpha on the back. The main advantage of the Alpha is the price, you can currently get a full set for $250
That being said I think I'm going to try a set of the new Michelin Power RS next time, especially now that they are making 110 Fronts and 150 Rears. |
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May 8th, 2017, 05:12 PM | #6 |
ninjette.org guru
Name: john
Location: placerville
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im running the bridgstones rs10. really like them. spendy 170 a tire.
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June 6th, 2017, 07:26 PM | #7 |
ninjette.org guru
Name: David
Location: Fort Worth,TX
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has anyone run the 125cc slicks? these?
http://stickboyracing.com/index.php/bridgestone/ 90 front and 120 rear. |
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June 7th, 2017, 01:14 AM | #8 | ||
Track Clown
Name: Chris
Location: Kingman, AZ
Join Date: May 2012 Motorcycle(s): '08 250R, 21 MV F3 800, Kawasaki 400 build Posts: A lot.
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June 7th, 2017, 01:20 AM | #9 | |
Track Clown
Name: Chris
Location: Kingman, AZ
Join Date: May 2012 Motorcycle(s): '08 250R, 21 MV F3 800, Kawasaki 400 build Posts: A lot.
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Quote:
but if it duals as street, stick with street tires, possibly go with the Pirelli Diablo Rosso 2 140 rear and 110 front. |
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June 7th, 2017, 06:12 AM | #10 |
ninjette.org guru
Name: john
Location: placerville
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on the rs10 watch your pressure front 23-25 rear 25-27 HOT right off the warmers.
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June 7th, 2017, 12:33 PM | #11 |
ninjette.org guru
Name: David
Location: Fort Worth,TX
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the link said a 120 for FRONT and REAR? is that right???
my bike is track only http://viets-performance.com/Tires/B...00-Slick-Set_2 |
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June 7th, 2017, 04:05 PM | #12 |
ninjette.org sage
Name: John
Location: Appleton, WI
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That's great if you have a pregen with a 3.5" rear rim, but not working well for 300's.
I used Alpha 13's. But I did notice they were a better hot weather tire than a cool morning tire, regardless of what I set the pressure to. If I were doing early season racing I think I would use Supercorsa SC's. 115/70 and 150/60. But June/July up here in Wisconsin, A13's are decent up until september. (IMHO) SoCal guys could probably use A13's year round.
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June 7th, 2017, 04:07 PM | #13 | |
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June 7th, 2017, 05:12 PM | #14 |
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I really like the Alpha-13 tyres.
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June 7th, 2017, 06:19 PM | #15 | |
Track Clown
Name: Chris
Location: Kingman, AZ
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June 7th, 2017, 06:20 PM | #16 | |
Track Clown
Name: Chris
Location: Kingman, AZ
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June 8th, 2017, 08:49 AM | #17 |
CCS Amateur #501
Name: Dave
Location: Iowa
Join Date: Jun 2015 Motorcycle(s): '09 250 SE 'Booger' Posts: 406
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I think i'm pretty set on getting a set of Pirelli SC's. For the 250, are folks using the 140 or 150 in back? How are the Pirelli's in the wet?
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June 8th, 2017, 09:16 AM | #18 |
????????????????
Name: T
Location: no where
Join Date: Feb 2016 Motorcycle(s): 2007 ninja 250, 14 ninja 300, 09 1125CR Posts: A lot.
MOTM - May '17
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Running 140 sc2 medium compound on the back feels great, as for wet cant say haven't ran in a rain day yet with them.
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June 8th, 2017, 09:22 AM | #19 | |
Private Joker
Name: Ben
Location: Towson, MD
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Quote:
Conditions: Brand, Front/Rear Dry hot: Pirelli, Sc1/Sc1 Dry hot: Pirelli/Dunlop Sc1/A13 (trackday setup) Dry medium: Pirelli, Sc1/Sc2 Dry colder: Pirelli, Sc1(2 if below 50 degrees)/Diablo Rosso II (Haven't tried 3) Wet (no dry line at all) Hot/medium/cold: Dunlop rain tires (don't know the exact model tire, just their current rain tire) Mixed hot/medium/cold: Dunlop, A13 Disclaimer, I have yet to try the Bridgestone S20/S21 or R(S)10 tires. I have also not tried the new michelin tires. My next tire test is going to be the metzelers during track days to see how they feel as a compromise between the dunlop's life and the pirelli's dry grip. I will report with my findings in a few months
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June 8th, 2017, 11:46 PM | #20 | |
ninjette.org sage
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Quote:
Putting a 150 on the back is a waste because you can't use all of the tire due to the pinched profile. Plus you are adding weight in one of the worst places possible. I've got two sets of Alpha 13 takeoffs that I bought from Bruce for my endurance bike. Couldn't pass up the price. The only time I had on them was a few runs up and down the parking lot and I thought something was wrong when I hit the brakes and the front tire slid on the pavement sealer. The Pirellis didn't do that. Not a big deal though, It's not like I'm racing on sealer covered racetracks and it has to do with the harder compound center tread section on the A13s. My teammates raced on them a couple of weekends ago and they were ok with them when the track was warm. I'll evaluate them myself in a couple of weeks at the next race and I'll decide if we will continue with the Dunflops or go back to the Pirellis. |
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June 9th, 2017, 03:54 PM | #21 | |
ninjette.org sage
Name: John
Location: Appleton, WI
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I've always been a Pirelli guy and I believe the SC's are the best you can get. But man I just got tired of paying for it, and the A13's were almost as good.
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June 9th, 2017, 07:30 PM | #22 | |
Private Joker
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June 10th, 2017, 09:39 PM | #23 |
ninjette.org guru
Name: David
Location: Fort Worth,TX
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a question for you guys running the A13. I bought my last winter have about 10 track days on them. I still have a little bit to go before the wear indicator, but today on the track I definitely felt the front slide a bit more. When do you guys usually change them out? I know Dunlop says heat cycles aren't relevant anymore. So is the wear indicator the only thing to go by?
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June 11th, 2017, 07:04 AM | #24 |
ninjette.org member
Name: Greg
Location: San Antonio
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If there is still plenty of wear left then I'd try playing around with the pressures a bit. I don't normally use the A13 front, only the rear, and it's obvious when it's time to change that one because there's no tread left and it's starting to slide under power on corner exits.
Last futzed with by GregS; June 12th, 2017 at 03:53 PM. |
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June 11th, 2017, 11:38 AM | #25 | |
ninjette.org guru
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June 11th, 2017, 10:09 PM | #26 | |
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Front=31 Rear=27 Last futzed with by DannoXYZ; June 12th, 2017 at 11:45 AM. |
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June 12th, 2017, 03:55 PM | #27 |
ninjette.org member
Name: Greg
Location: San Antonio
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Yeah I've heard of people running much lower pressures on the Alphas. I've tried it and not really noticed any difference in terms of lap times, but they did seem to wear quicker and would generate weird wear patterns, so I bumped them back up close to the recommended levels.
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June 13th, 2017, 02:17 PM | #28 | |
ninjette.org guru
Name: David
Location: Fort Worth,TX
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Quote:
have you ever run them at 33/33 like recommended? |
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June 13th, 2017, 04:15 PM | #29 | |
ninjette.org member
Name: Greg
Location: San Antonio
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June 14th, 2017, 09:43 AM | #30 |
ninjette.org guru
Name: David
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June 14th, 2017, 03:34 PM | #31 |
ninjette.org sage
Name: John
Location: Appleton, WI
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32/32 hot off warmers is what I use in warm weather.
Something of note though, I weigh about 215 lbs and my bike only had moderate weigh loss work done to it. I suspect scrawny guys with 50 less pounds of gut and 15-20 less pounds of bike can get away with lower pressures. Everyone listing pressures should probably be qualifying that with body and bike weight. If I went down to 27 in the rear, my tires would overheat. If found that same thing with Pirelli SC's, some people's lower pressure suggestions would overheat them and they would start feeling greasy.
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June 14th, 2017, 05:08 PM | #32 |
ninjette.org member
Name: Greg
Location: San Antonio
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June 15th, 2017, 01:00 PM | #33 | |
ninjette.org guru
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June 15th, 2017, 01:32 PM | #34 |
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I'm about 195-lbs and like them at 31/29psi hot.
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June 24th, 2017, 12:09 PM | #35 |
ninjette.org member
Name: Greg
Location: San Antonio
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Going to give the new Power RS rear tire a try out next weekend. The tread on these looks really deep, so hoping for some long life as well.
Last futzed with by GregS; June 24th, 2017 at 03:33 PM. |
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July 6th, 2017, 06:25 AM | #36 |
ninjette.org sage
Name: Timm
Location: West Seneca, NY
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So I tried the Alpha 13’s on a practice day and during a 3 hour endurance race the following day and I rate them as an ok tire. They are pretty much as I thought: Not a true race tire but still decent and a good value if your money is tight. Are they capable of winning races? The answer is: It depends. We won our 3 hr endurance by 5 laps, but if you’re running at the sharp end of the field in a sprint race I wouldn’t recommend them. I think that a rider would be putting themselves at a slight disadvantage because the A 13’s just don’t have the outright grip that the Pirelli Supercorsas do. Even with endurance racing on a 250 Ninja we got the Pirellis to last for four three hour races so that still is pretty good. I suspect that the A 13’s would have similar or better life. The main issue I had with the Dunlops was the feedback: If you go into a corner after braking and are not immediately on the gas they will let you know they don’t like it by chattering or wiggling around. Now you might say that you’re not supposed to be off the gas in the middle of a corner. I would agree with that for the most part, but I would say that just about everybody gets into a corner a little hot now and then and we have a tendency to want to wait just a tiny bit to get back on the gas. The Dunlops don’t want to let you do that and I suppose in a way that is a good training tool to remind you to not to be off throttle in a corner. I did also find that in long high speed corners where you are not always hard on the gas the ‘Lops will not really chatter but do a front end “wiggle”. Kind of distracting when it happens. All of the issues that I experienced were with the front tire with one minor exception: I have a 300 Ninja rim on the back of my 250 to get the proper profile with the A 13 rear. The minor issue is that the edges of the tire are so close to the swingarm that it causes problems with catching my tire warmers during installation and removal. I had no issues with grip on the rear A 13 but I think that a 150 width tire is unnecessary for the 250. I used the Pirelli rear in a 140 width and had zero issues with grip, so I think that the Alpha 13 in a 150 size adds weight in the worst place possible with no performance benefit.
The biggest thing to me is that the A 13 front will slide earlier than the Pirelli. I was working on my line on a fairly tricky low speed corner and I hit some bumps at the apex which produced a chatter-slide-chatter. Biggest front end slide I’ve had in a while. Another medium speed corner where I was working on getting the exit right and I clipped the inside curbing which produced a tuck and a tankslapper enough that I decided to straighten up and ride off the track at a pretty good clip. Fortunately I just rode through the grass and eased back on the track without further incident. Would the Pirellis have just gripped when that happened? I can’t say for sure. I will say that my teammates did not experience the same issues that I did with the A 13’s as their riding style did not produce the same experience that I had with them So it comes down to this: I know that we can win endurance races on the A 13’s and they are way cheaper than the Pirelli Supercorsas, but the A 13’s are simply not as good as the Supercorsas in terms of outright performance in the dry. As for economy, I was tempted to try the A 13’s because they were so cheap. But cheapness really carries little weight when we are talking about doing what it takes to race and win. You might say: “but you won on the Dunlops. Why don’t you keep using them?” I’d say that we did win one race, but there are still four races to go and I don’t want an inferior tire if comes down to a close battle in a race and falling down does not help win championships. In the end it comes down to my preference and what produces the most confidence. For that, the Pirellis win hands down. I get better performance out of myself and my bike with the Pirellis so that is what I will be using for the forseeable future. |
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July 6th, 2017, 10:24 AM | #37 |
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heh, heh... I tucked front-end in turn-2 @ Thunderhill a couple of times this last weekend. I guess adding throttle while tightening line and adding lean is not a good idea huh? hahahahaha.... Yeah, it waggled the front-end and I stood it up, went off-road a little and came back on.
Anyone know where I can find Alpha-13 rears in 140/70-17 in the U.S.? Seems they're available from everyone in Europe & Asia, just not here. https://www.tyreleader.co.uk/motorbi...r17-66h-423794 https://www.mcas.com.au/shop/item/du...ha-13-tyres-05 http://firetires.de/dunlop/315-alpha...-r-17-66h.html |
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July 6th, 2017, 12:09 PM | #38 |
????????????????
Name: T
Location: no where
Join Date: Feb 2016 Motorcycle(s): 2007 ninja 250, 14 ninja 300, 09 1125CR Posts: A lot.
MOTM - May '17
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only place in the usa here exclusive rights here unless you get used ones for someone else
http://stores.racetireservice.com/ninja-250r/ |
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July 6th, 2017, 02:17 PM | #39 |
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#$*!@# it!!! Damn greedy monopolistic filthy capitalist pigs!!!!
I think large part of "issues" people report with front-end is that 110/150 tyre combo has mismatched profiles. You're at edge of front-tyre while rounded rear has more room to lean. A 140/70 rear would be better match for 110/70 front. I've found lowering front-pressure and having just 1-2 psi difference F/R really improves balance. Still would be best to get 140/70 rear. Horrible bastards! I'm switching to Pirelli !!! |
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July 6th, 2017, 04:07 PM | #40 | |
ninjette.org sage
Name: Timm
Location: West Seneca, NY
Join Date: Oct 2015 Motorcycle(s): 2006 1050 Speed Triple, 2010 250 Ninja racebike, YZF320RR? Racebike Posts: 556
MOTM - Nov '15
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Quote:
When I switch back to the Pirellis I will use the 140 rear as I did before and go back to the stock 3.5" rim width. The 140 rear Pirelli never gave me issues with grip, so there is no advantage to using the 150. In fact there is a disadvantage because the 150 tire weighs more which adversely affects acceleration. |
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