Michelin Power One PSI?

[Miticale]

Lining up for the first track day of the season & my first double duty track day. Tires & race bodywork on and have upgraded from the Michelin Powers to the Power Ones. Tried using the Michelin calculator (http://michelin-power.com/) however not sure if their BAR readings are for hot or cold. Anyone running these & have any idea as to cold & hot temps?

[San&Gab]

I would not worry so much about that. Someone will have an answer for you at the track, I’m sure. Now that I think about it, I’ll be using Michelins (DOT) this year… I wonder if I’ll feel any differences from the Dunlops N-tec.
Are you also planning for he week of May 4th?

[Muz720]

Are you using warmers? where are you running?
If using warmers temps should be taken hot with the warmers on just before you take them off or after 45mins once up to temp.
Cold psi ??? used to run 30 front cold 28 rear hot temps 33-34 front 32 rear at NHMS
alll things being = track and weather play a part in this! cold days cold track, hot days hot track! can swing things + or - plus how hard you run!!
Are there tire guys at the track? if so ask!
also check tire psi after you come off the track! adjust as needed, good luck

[Supergirl]

Are you using warmers? where are you running?
If using warmers temps should be taken hot with the warmers on just before you take them off or after 45mins once up to temp.
Cold psi ??? used to run 30 front cold 28 rear hot temps 33-34 front 32 rear at NHMS
alll things being = track and weather play a part in this! cold days cold track, hot days hot track! can swing things + or - plus how hard you run!!
Are there tire guys at the track? if so ask!
also check tire psi after you come off the track! adjust as needed, good luck

There's just too much wrong in your post.....

Stop giving people advice on tire pressures if you don't know what you're talking about. It could ruin somebody's track day...


Michelin Power One should be set cold and the general recommendation is 30-32 front, 22-24 rear.

Pirellis, on the other hand, you set hot.

[Supergirl]

From a Michelin tire guy

v- 30psi cold, may like 31psi cold to give a firmer feeling to the
softer carcass of the V.
b- 22psi cold, if it is super friggen hot, can try taking 1-3psi out.
Super hot as in above 85f outside, with track temp above 115f.

V-great all around front tire. All that need be known. Works in the
cold and hot for pretty much everyone.
B-firmer than an A, softer than a C. Used for ambient temps above 68F outside.

And.. more info than you may want.
INFO ON NEW Power 1 tires...
POWER 1 tires (info)
FRONTS - pressures (30psi cold, some like 31 on the V)
all the DOT 17" fronts are MULTI compound and run 30psi cold. (just
like the C). There are three (3) fronts to choose from. THe A and the
B are SLIGHTLY more rounded but IS trianguilated. the V, the most
triangulated or pointed of the 3 tires. A and B are slightly less
triangulated than the old C front but apparently nearly exact same
height. According to Michelin, the A and B would be the most popular
tires and are 5 ply tires.

A- 9.48lbs, 605.4mm diameter and is the softer compound, used for when
ambient temps are below 68F.
compounds would be 4/8/4 with the 4 (softer) would be the entire
contact patch at full lean.
B- 9.48lbs, 605.4mm , slightly harder than the A, and used when temps
are above 68F.
compounds would be 5/8/5 with the 5 slightly firmer than the 4.
V- 9.92lbs, 606mm, however is 4 ply (not 5 like A and B), and is more
triangulated almost "pointed" with a 5/8/5 compound.

REAR TIRES. (22psi cold, may try 19-20 if it is SUPER hot outside and
track temp above 115f)
-all the180/55 are 639.5mm in diameter, 13.73lbs, are 4 ply and multi
compund (35% of edges is softer so 35%/30mid%/35%)
-all the 190/55 are 652.8mm tall. 14.77lbs, 4 ply and multi compound.
-the "A " tire edges of the 180 and 190's would be a "4" (soft) compound edge
- the "B" edges being "5" (not as soft as 4),
-THe "C" REAR will be an endurance type tire with a "6" type edge
-ALL the middles of all the tires being a "9" compound (hardest).

TIRE WARMERS: as per Michelin, for COMPETITION (not street tires) put
warmers at 176F for 30-40 min before use for FRONT AND REARS. DO NOT
leave on for more than 90 minutes ever. If guys find something that
works better please let us know.

WEAR: when the rain sipes are gone the tires are designed to STILL
WORK ! so dont rush to change when the rain sipes are gone. The tires
are designed to loose the rain sipes to become a "slick".

There WILL be NEW series power1 150 and 160 rears, as well as 110
fronts but are not here yet. There will only be an A and B but front
and rear are multi compound.
The slicks are out right now! the old 46a slick 17" front is still
available but will be labled "Power1" like the DOT tires. NEW 16.5" -
3 choices front and rear like the DOT line. MULTI COMPOUND (still hard
middle, but one side is softer than the other, softer side has a "-"
and harder side has "+"

Track day/sport tire are all 3 ply and are multi compound front AND
rears. Front is 4/8/4 and the rear is 3/7/3..so may get too hot with
fast riders. There is less area of soft sides on these, 75% of the
middle is 7 or hard, with only 12.5% on each side being the "3" or
softer compound.

[Muz720]

Yup, Raced for over 20 years. I don't have a clue!
I said what I ran at nhms... not want he should run wherever that my be? and that he should ask the tire guy at the event he was going to!
tire pressures can and do vary with each bike, rider and track that you run at!
Good day!

[Supergirl]

Yup, Raced for over 20 years. I don't have a clue!
I said what I ran at nhms... not want he should run wherever that my be? and that he should ask the tire guy at the event he was going to!
tire pressures can and do very with each bike, rider and track that you run at!
Good day!

the thread starter seems not to have 20 years racing experience.

setting his power one rear to 32 hot, when most racers run it 22 cold, will put him on his head in the first lap.

[Muz720]

I think your over stating what the outcome of a few psi will do to his day!

[Tony216]

At the very least it'll ruin a new rear in no time flat.

When it comes to track stuff, you're always better off with your trackside vendor than you are on an online forum.

[rsvfrank]

did a race license course yesterday with power ones race , my settings were 1.7 bar rear and 2.1 bar front worked well for me .
tracktemp was about 17 cf

[Miticale]

Sorry for the delayed response guys, but thanks for the help. I ended up running 29 F 22 R (cold). Didn't have warmers, Unfortunately I think that's what might have did my tires in, going to have to flip the rear to get some more lie out of it but back to back days seemed to cooked them (at least the rear).

Leads me to another question, might be dumb but worth asking - do you ever swap one tire & not the other? The front tire seems to stil have some meat to it, but the rear is close to calling it a day. Could I just replace the rear, or go ahead and do both? I went faster these past two days than I have the past 2 years, so I'm dealing with this stuff as I go along. Thanks.

[Peter S]

Are you using standard Power Ones (for road use) or Power One track tyres? The track tyres have either A (soft), B (medium) or C (hard) on the sidewall. I have not used the road version but the track tyres are particularly prone to tearing if pushed hard before they are up to temp! They really need to be on warmers before use.
The pressures you ran are OK for those tyres. The guy who suggested 30psi for the rear is way out! I don't know how fast you are or the climate you're in but we have run the rears as low as 19 psi cold on really hot days with good results.
I've been using B compounds front and rear lately and usually get two to three days from a rear and around five to six from the front. When I am at a track like Phillip Island that has predominantly left handers I flip the rear to get a bit more life out of it! I have never flipped a front though! These tyres stick like s*#t to a blanket when set up correctly.

[Miticale]

Are you using standard Power Ones (for road use) or Power One track tyres? The track tyres have either A (soft), B (medium) or C (hard) on the sidewall. I have not used the road version but the track tyres are particularly prone to tearing if pushed hard before they are up to temp! They really need to be on warmers before use.
The pressures you ran are OK for those tyres. The guy who suggested 30psi for the rear is way out! I don't know how fast you are or the climate you're in but we have run the rears as low as 19 psi cold on really hot days with good results.
I've been using B compounds front and rear lately and usually get two to three days from a rear and around five to six from the front. When I am at a track like Phillip Island that has predominantly left handers I flip the rear to get a bit more life out of it! I have never flipped a front though! These tyres stick like s*#t to a blanket when set up correctly.

That's actually something I could use a hand in clarifying - I ordered them through Parts Unlimited and as a dealer and customer we weren't given a choice of compound, just the type of tire I wanted to order. I'm assuming then I got Power One roads and not the competition, multi-compound choice tires.

[hank]

I have the PDF directly from Michelin - they claim Rear 1.5 Bar & Front 2.1 Bar - that equates to 21.7557 and 30.45798 respectively...

Then again, I'm still not comfortable with the whole 'set it at ambient and forget it' concept...

YMMV

[Peter S]

Yes. It does not seem logical does it! But they at least quote ambient temperature parameters for choosing compounds I guess. As I said earlier I can't fault their performance so far so they must know what they are doing! I don't want to thread jack this but has anyone tried their replacement, the 'Power Cup'?
I hear you guys have had them in the States for a few months now. We get them here next month so I'm told.