Dunlop Alpha 13 - Page 3

RacinNinja · June 2nd, 2016, 09:22 AM

Quote:

Originally Posted by daverdfw

I thought running 23 on the rear would be low, but I think the rear looks ok, what do yo guys think?

I think you shouldn't base tire pressures on what you see in a forum. The ideal way is a 10% increase from cold to hot. They are a decent starting point but no more than that.

Set tire pressures cold. Go ride. (Unless you have warmers, then ignore this part)

Come back in and immediately check. Should be a 10% increase.

If it doesn't go up 10%, let out air. If it goes up more than 10%, add air.

daverdfw · June 2nd, 2016, 09:27 AM

Quote:

Originally Posted by RacinNinja

I think you shouldn't base tire pressures on what you see in a forum. The ideal way is a 10% increase from cold to hot. They are a decent starting point but no more than that.

Set tire pressures cold. Go ride. (Unless you have warmers, then ignore this part)

Come back in and immediately check. Should be a 10% increase.

If it doesn't go up 10%, let out air. If it goes up more than 10%, add air.

this makes a lot more sense, thank you!

sharky nrk · June 2nd, 2016, 10:57 AM

Quote:

Originally Posted by daverdfw

this makes a lot more sense, thank you!

Even better if your at the track and one is available - go talk to the tire vendor and show him your wear and ask about pressures and feel and grip. A relationship with the tire vendor can be all kinds of helpful when it comes to diagnosing issues.

daverdfw · June 2nd, 2016, 10:58 AM

Quote:

Originally Posted by sharky nrk

Even better if your at the track and one is available - go talk to the tire vendor and show him your wear and ask about pressures and feel and grip. A relationship with the tire vendor can be all kinds of helpful when it comes to diagnosing issues.

the only vendor at the ridesmart days is a Bridgestone rep

sharky nrk · June 2nd, 2016, 11:10 AM

Quote:

Originally Posted by daverdfw

the only vendor at the ridesmart days is a Bridgestone rep

Check that one as well. Crazy Jack does push 'stones but I am pretty sure I saw the Pirelli vendor at TWS on Monday. Not sure who handles the Dunlops here now.

daverdfw · July 2nd, 2016, 10:23 AM

just picked up some warmers from a kid that is getting out of running the Moto America RC390 cup series, he told me on this tires hot off warmers the fast kids were using 25 PSI in the rear hot off warmers, so the same thing I heard 32/23 cold. or 34/25 hot he said the dunlop website is really high on the rear for whatever reason. Just thought I would throw it out there.

bruce71198 · July 5th, 2016, 08:50 AM

Quote:

Originally Posted by daverdfw

just picked up some warmers from a kid that is getting out of running the Moto America RC390 cup series, he told me on this tires hot off warmers the fast kids were using 25 PSI in the rear hot off warmers, so the same thing I heard 32/23 cold. or 34/25 hot he said the dunlop website is really high on the rear for whatever reason. Just thought I would throw it out there.

Run 31/front off the warmers, Alpha13's

RacinNinja · July 5th, 2016, 08:54 AM

Dunlop guy at my track said 31 front/28 rear cold. Of course, YMMV but if there is a local rep I'd ask them! Came of the track with a perfect 10% increase in pressure once the tires warmed up.

We are lucky enough to have them at almost every event.

On another note, very impressed with this tire combo. Stuck like glue and handled very well, IMO.

daverdfw · July 5th, 2016, 10:01 AM

Quote:

Originally Posted by RacinNinja

Dunlop guy at my track said 31 front/28 rear cold. Of course, YMMV but if there is a local rep I'd ask them! Came of the track with a perfect 10% increase in pressure once the tires warmed up.

We are lucky enough to have them at almost every event.

On another note, very impressed with this tire combo. Stuck like glue and handled very well, IMO.

do you run them on warmers or cold?

RacinNinja · July 5th, 2016, 10:02 AM

Quote:

Originally Posted by daverdfw

do you run them on warmers or cold?

Cold.

bruce71198 · July 5th, 2016, 12:16 PM

Quote:

Originally Posted by RacinNinja

Dunlop guy at my track said 31 front/28 rear cold. Of course, YMMV but if there is a local rep I'd ask them! Came of the track with a perfect 10% increase in pressure once the tires warmed up.

We are lucky enough to have them at almost every event.

On another note, very impressed with this tire combo. Stuck like glue and handled very well, IMO.

The Dunlop rep at MA had us upping the pressure to get rid of chatter problems, chased it for several rounds until going the other way, no more chatter problems with lower pressure. Just relaying my experiences.
Also we get a new Alpha13 compound this week at Laguna. I'll update

daverdfw · July 5th, 2016, 12:21 PM

Quote:

Originally Posted by bruce71198

The Dunlop rep at MA had us upping the pressure to get rid of chatter problems, chased it for several rounds until going the other way, no more chatter problems with lower pressure. Just relaying my experiences.
Also we get a new Alpha13 compound this week at Laguna. I'll update

what rear pressure off warmers are they recommending?

RacinNinja · July 5th, 2016, 12:23 PM

Quote:

Originally Posted by bruce71198

The Dunlop rep at MA had us upping the pressure to get rid of chatter problems, chased it for several rounds until going the other way, no more chatter problems with lower pressure. Just relaying my experiences.
Also we get a new Alpha13 compound this week at Laguna. I'll update

Ya, different track, different asphalt, different air temps too probably.

YMMV with any air pressure recommendation.

bruce71198 · July 5th, 2016, 12:27 PM

Quote:

Originally Posted by daverdfw

what rear pressure off warmers are they recommending?

I don't recall but it seemed high 30-31 maybe, They claim that the pressure is needed to maintain carcass shape and hence proper footprint and a bunch of other engineer stuff but when it came to real world results we're at 24-26 rear off the warmers and 31 front off the warmers (172 degrees F)

AwDang · July 5th, 2016, 12:29 PM

Quote:

Originally Posted by RacinNinja

Dunlop guy at my track said 31 front/28 rear cold.

Thats what we settled on for the enduro

Quote:

Originally Posted by bruce71198

Also we get a new Alpha13 compound this week at Laguna. I'll update

orly?

bruce71198 · July 5th, 2016, 12:39 PM

Quote:

Originally Posted by AwDang

Thats what we settled on for the enduro

I'm not saying this is wrong, the traction wasn't bad at those pressures but if you need to push the limits lowering the pressure does the trick.

AwDang · July 5th, 2016, 12:56 PM

Quote:

Originally Posted by bruce71198

I'm not saying this is wrong, the traction wasn't bad at those pressures but if you need to push the limits lowering the pressure does the trick.

no worry. I was just backing up his data point

bruce71198 · July 5th, 2016, 03:01 PM

Quote:

Originally Posted by AwDang

no worry. I was just backing up his data point

Gotcha. Who knows running at the higher pressure might make them last longer. That being said I have a bunch of take offs with one practice session and one race on them if any ones interested.

GregS · July 5th, 2016, 03:48 PM

I usually run the rear Alpha at 28 cold, but might try dropping it and see how it feels.

bruce71198 · July 6th, 2016, 01:21 PM

Quote:

Originally Posted by AwDang

orly?

MA's Dunlop news release

Buffalo, NY: As part of Dunlop’s strategy for the continual improvement of its motorcycle racing tires, and in conjunction with its partners MotoAmerica, Dunlop will be introducing the Alpha-13 SP tire for KTM RC Cup competitors at Laguna Seca. The tire allocation for Laguna Seca will not be modified, comeptitors will still recieve 2 front and 2 rear tire stickers. The old compound tire is legal for use for this event.

“Following some very positive early season testing with the new Alpha-13 SP tires, we are excited to offer this best-in-class new product to our KTM RC Cup customers” said Mick Jackson, Senior Manager - Product Development and Road Race. “For this introductory event we are pleased to help our customers with the cost of their tires by giving them the front tire free of charge when purchasing a second set”.

daverdfw · July 6th, 2016, 02:31 PM

Quote:

Originally Posted by bruce71198

MA's Dunlop news release

Buffalo, NY: As part of Dunlop’s strategy for the continual improvement of its motorcycle racing tires, and in conjunction with its partners MotoAmerica, Dunlop will be introducing the Alpha-13 SP tire for KTM RC Cup competitors at Laguna Seca. The tire allocation for Laguna Seca will not be modified, comeptitors will still recieve 2 front and 2 rear tire stickers. The old compound tire is legal for use for this event.

“Following some very positive early season testing with the new Alpha-13 SP tires, we are excited to offer this best-in-class new product to our KTM RC Cup customers” said Mick Jackson, Senior Manager - Product Development and Road Race. “For this introductory event we are pleased to help our customers with the cost of their tires by giving them the front tire free of charge when purchasing a second set”.

I wonder whats different with the SP version

bruce71198 · July 6th, 2016, 04:09 PM

Quote:

Originally Posted by daverdfw

I wonder whats different with the SP version

Supposedly more edge grip. I'll update after the races this weekend.

GregS · July 6th, 2016, 04:51 PM

Quote:

Originally Posted by bruce71198

Supposedly more edge grip. I'll update after the races this weekend.

Mmmm... can't wait

daverdfw · July 6th, 2016, 06:26 PM

Quote:

Originally Posted by bruce71198

Supposedly more edge grip. I'll update after the races this weekend.

grab some take offs

bruce71198 · July 11th, 2016, 10:42 AM

The new tires grip better on edge. The old ones would slide controllably and predictably. The new ones aren't sliding as desired but instead chattering. MA confiscated the top 5 qualifiers shocks and tore them down. Gave them back with new fluid, bushings, seals and a charge so finding a set up was tricky with the limited track time we had left. I think once the rear is sorted these tire will work much better than the previous version.

daverdfw · July 11th, 2016, 12:59 PM

Quote:

Originally Posted by bruce71198

The new tires grip better on edge. The old ones would slide controllably and predictably. The new ones aren't sliding as desired but instead chattering. MA confiscated the top 5 qualifiers shocks and tore them down. Gave them back with new fluid, bushings, seals and a charge so finding a set up was tricky with the limited track time we had left. I think once the rear is sorted these tire will work much better than the previous version.

good stuff! Not that I am at a level where I could tell the difference, maybe the SP's will be sold to the public for next season

July 5th, 2016, 08:54 AM	#88
RacinNinja Vintage Screwball Name: B Location: Washington Join Date: Feb 2016 Motorcycle(s): 2011 Ninja 250, 2008 Ninja 250, 2019 KTM 1290SDR, 2017 FZ10 Posts: A lot. MOTM - Mar '16	Dunlop guy at my track said 31 front/28 rear cold. Of course, YMMV but if there is a local rep I'd ask them! Came of the track with a perfect 10% increase in pressure once the tires warmed up. We are lucky enough to have them at almost every event. On another note, very impressed with this tire combo. Stuck like glue and handled very well, IMO. __________________________________________________ Goin' fast on slow bikes!

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July 2nd, 2016, 10:23 AM	#86
daverdfw ninjette.org guru Name: David Location: Fort Worth,TX Join Date: Nov 2015 Motorcycle(s): 2009 Ninja 250 Posts: 386	just picked up some warmers from a kid that is getting out of running the Moto America RC390 cup series, he told me on this tires hot off warmers the fast kids were using 25 PSI in the rear hot off warmers, so the same thing I heard 32/23 cold. or 34/25 hot he said the dunlop website is really high on the rear for whatever reason. Just thought I would throw it out there.

July 5th, 2016, 03:48 PM	#99
GregS ninjette.org member Name: Greg Location: San Antonio Join Date: Dec 2014 Motorcycle(s): Ninja 300, GSXR-750, Ducati M1100 Posts: 185	I usually run the rear Alpha at 28 cold, but might try dropping it and see how it feels.

July 11th, 2016, 10:42 AM	#105
bruce71198 ninjette.org sage Name: bruce Location: northern illinois Join Date: Jan 2012 Motorcycle(s): Race bikes:08 Ninja 250,11 R6,16 ZX6,SV650.3 HD-1947,2-2003,2010. 1946 Indian and a lot of dirt bikes.2 Posts: 999	The new tires grip better on edge. The old ones would slide controllably and predictably. The new ones aren't sliding as desired but instead chattering. MA confiscated the top 5 qualifiers shocks and tore them down. Gave them back with new fluid, bushings, seals and a charge so finding a set up was tricky with the limited track time we had left. I think once the rear is sorted these tire will work much better than the previous version.