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Old April 18th, 2018, 11:16 AM   #1
jkv45
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Bridgestone Battlax R11 DOT Race Tire review

http://www.motorcycle.com/products/r...-dot-race-tire
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Old April 18th, 2018, 12:57 PM   #2
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They sound very interesting, I've had my supplier on notice to get me a pair since Oct. of last year. He was told by the distributer they should be available in May for the small bikes, tires for the big bikes probably available in March. If they make it in May I'll get a set.
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Old April 18th, 2018, 01:27 PM   #3
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My crack tire dealer is saying mid-May as well for ninjette sizes. Really, the only question is 140 or 150 rear? My old Alphas have a good half inch chicken strip in spite of hitting expert times consistently, so I'm thinking I could pull off a 140 and save a bit of rotating mass.
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Old April 18th, 2018, 10:39 PM   #4
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I'm going with 140 rear as well. It's also a front/rear balance issue and 150 rear always out-grips a 110 such that front-end will always slide first; very scary! I pre-ordered a set last month, hopefully here before next round for testing.
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Old April 19th, 2018, 01:47 PM   #5
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Originally Posted by DannoXYZ View Post
I'm going with 140 rear as well. It's also a front/rear balance issue and 150 rear always out-grips a 110 such that front-end will always slide first; very scary! I pre-ordered a set last month, hopefully here before next round for testing.
So you are saying that you have been sliding the front on corner exit? Because that's the only time that the balance scenario would possibly come in to play.

I'm not so sure that the 140 is going to be any better for you as the 150 profile is pinched on a 250 rim, so its contact patch isn't as good the 140 at full lean.

I ran an entire season on (6 three hour endurance races) on one set of Motoamerica A-13 takeoffs. Never slid the front on corner exit. I did slide the front on corner entry a handful of times though. I used a 300 Ninja rear wheel so the 150 profile was about as good as it was going to get. Only time I slid the rear was in damp patches on a drying track on corner exit.
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Old April 19th, 2018, 06:44 PM   #6
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I've been running Bridgestone RS-10s 110 & 140 for the last couple years and have had the front move around and slip from just after corner entry to the apex and on to the exit (where there is some rough pavement). Never had it slip on turn in, but I always seem to enter too slow and start picking it up before apex, never had the rear slip. I don't think it's a tire thing with the front but am pretty sure it's a fork tuning thing that I don't have right yet.
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Old April 22nd, 2018, 02:08 PM   #7
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Originally Posted by tgold View Post
So you are saying that you have been sliding the front on corner exit? Because that's the only time that the balance scenario would possibly come in to play.

I'm not so sure that the 140 is going to be any better for you as the 150 profile is pinched on a 250 rim, so its contact patch isn't as good the 140 at full lean.

I ran an entire season on (6 three hour endurance races) on one set of Motoamerica A-13 takeoffs. Never slid the front on corner exit. I did slide the front on corner entry a handful of times though. I used a 300 Ninja rear wheel so the 150 profile was about as good as it was going to get. Only time I slid the rear was in damp patches on a drying track on corner exit.
Yeah, have slid front-end on corner exit, corner entry and everywhere in between. One low-side crash in 48-days @ track last year was getting impatient in turn-2 sweeper @ Thunderhill East. Cracked open throttle more and more and guess what? Front-end let go!

Only gotten back-end out once in ~2000 laps by going in too hot and then giving throttle at full lean. That was with Pirelli SC-V2 with 140 rear.

I found using stickier Alpha 13-SP front and regular Alpha-13 rear gave me best balance and lap-times.
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Old April 23rd, 2018, 10:07 AM   #8
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Quote:
Originally Posted by DannoXYZ View Post
Yeah, have slid front-end on corner exit, corner entry and everywhere in between. One low-side crash in 48-days @ track last year was getting impatient in turn-2 sweeper @ Thunderhill East. Cracked open throttle more and more and guess what? Front-end let go!

Only gotten back-end out once in ~2000 laps by going in too hot and then giving throttle at full lean. That was with Pirelli SC-V2 with 140 rear.

I found using stickier Alpha 13-SP front and regular Alpha-13 rear gave me best balance and lap-times.
I'm not so sure you can attribute this issue strictly to the grip difference betwen a 150 and a 140 width tire. Have you been making ride height adjustments to compensate for any of this?
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Old April 23rd, 2018, 12:16 PM   #9
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I'm not so sure you can attribute this issue strictly to the grip difference betwen a 150 and a 140 width tire. Have you been making ride height adjustments to compensate for any of this?
Yeah, not all in tyre sizing, just large portion perhaps. I rebuilt front-end over winter, lowered fork in clamps about 12mm and increased rebound-damping. That did seem to improve front-end grip and I dropped a second off my times at Buttonwillow compared to end of season last year on same Alpha 13-SP/Alpha-13 combo.

Looking forward to trying the R11 next, most likely at Thunderhill next round if they arrive in time.
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Old April 23rd, 2018, 01:14 PM   #10
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Quote:
Originally Posted by DannoXYZ View Post
Yeah, not all in tyre sizing, just large portion perhaps. I rebuilt front-end over winter, lowered fork in clamps about 12mm and increased rebound-damping. That did seem to improve front-end grip and I dropped a second off my times at Buttonwillow compared to end of season last year on same Alpha 13-SP/Alpha-13 combo.

Looking forward to trying the R11 next, most likely at Thunderhill next round if they arrive in time.
With A-13SP's front and rear, my rear ride height has been stock. I don't remember my front ride height off the top of my head, but I can measure it and let you know what it is if you're interested.
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Old April 27th, 2018, 02:24 PM   #11
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i wonder if they are gonna make RS-11 also
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