Michelin PR2 tire pressure ?

What do you guys run in your tires ?

My local shop said 34 front and 32 rear .

 

Around 34-36 in the front and 40-42 in the rear. Not only is that what's recommended for this bike per the sticker on the frame, but it's also the recommended pressure by my very knowledgeable ex-racer mechanic. If you're at the track, then you may want to lower the psi. If you're running your tires at such a low psi day-to-day, you'll negatively affect your tires. They'll probably wear on the sides more quickly.

 

I just got a new rear tire (Pilot Road 2) and I have been running just like the manual says, 36/42 but I am curious as well.
Tom

 

I was thinking that the pressure was a bit low .

But after 3000km the tires look like new still.

 

You're not going to see much difference in 1,500 miles anyway. 36/42 it's on the frame sticker .... run 'em to low you can over heat them and make them start making buggers inside the tyre, and get the rubber to soft it can blow. Not to mention front wheel cupping....

Disadvantages of Underinflation

An underinflated tire can't maintain its shape and becomes flatter than intended while in contact with the road. If a vehicle's tires are underinflated by only 6 psi it could weaken the tire's internal structure and eventually lead to tire failure. Lower inflation pressures will allow more deflection as the tire rolls. This will build up more internal heat, increase rolling resistance (causing a reduction in fuel economy of up to 5%) and reduce the tire's tread life by as much as 25% while increasing the probability of irregular treadwear. Drivers would also find a noteworthy loss of steering precision and cornering stability. While 6 psi doesn't seem excessively low, it typically represents about 20% of a passenger car tire's recommended pressure.

Disadvantages of Overinflation

An overinflated tire is stiff and unyielding and the size of its footprint in contact with the road is reduced. If a vehicle's tires are overinflated by 6 psi, they could be damaged more easily when encountering potholes or debris in the road, as well as experience irregular tread wear. Higher inflated tires cannot isolate road irregularities as well causing the vehicle to ride harsher and transmit more noise into its interior. However, higher inflation pressures reduce rolling resistance slightly and typically provide a slight improvement in steering response and cornering stability. This is why participants who use street tires in autocrosses, track events and road races run higher than normal inflation pressures.

 

I thought I should mention that I'm close to replacing my front PR2 in the next 500 miles or so and I will have ridden about 13k miles on it with good wear (no cupping or uneveness). Always around 35 psi in the front.

 

Always 36F 42B. :thumbsup:

Have been amazed with the wear on my Pilot R2s was going to replace my front after about 9K miles because I've got a 1000mile overnighter this week but it still looks supprisingly good and with you getting 13K miles out of yours will now wait until I get back...Mind my Front tyre has just started to cup a fraction under close inspection but then so did the last 4 Power fronts before it.

 

How much do you weigh? I just started using the PR2's and I'm running 36/42 F/R..... which is what I ran in my PR's ..... I've gone though a heep of PR's and I've been getting around 7/8k out of the rear , and 10k out of the Front.... But there's a big Diff now that I moved back to VA from Colo.... Colo I was able to use more of the tyre because I rode mostly on curves so it limits the time wasted on the middle of the tyre.... if you're a lot lighter than me, then I'll probably stay with 36/42.... If around my weight than I might try a set with 35/42....

 

You bring up a good topic, on front cupping. I like my tyre patterns crossing the centre, and also like bigger blocks in the pat' as well. Seems to help with the cup' issue.... But I've really been working on my riding style lately, because I found myself late braking in the front a lot, Knowing that I shouldn't.... So I've been getting off it closer to the time I'm starting to turn, and I haven't been getting "any" noticable cup'n, not to mention my turns are smoother..... I think it was to many track day's in Colo got me using the F/R brake deeper in the turns were I really didn't need to.....

 

I just got a PR2 rear, and am very impressed with it thus far, even tough I only have about 500 miles on it.

My question is somewhat on the topic, maybe someone can enlighten me:

My front tire is a Dunlop Qualifier with about 6,000 miles on it that is pretty badly cupped on both sides. Due to financial constraints, I can't afford to replace it right away.

I have read that cupping in car tires is related to poor shock absorption, i.e. dead shocks. As far as I know that the front forks in my 14 year old, 20,700 mile VFR have never been torn down and re-oiled.

So I'm guessing that I don't want to throw a new tire on the front end after I get the front forks back up to snuff, right?

 

That may be true, but I had bad cupping on the original Dunlops on my bike and no cupping whatsoever on the Pilot Road 2s I have on there now even though I have more miles on the Pilot Roads (8,000) than I had on the Dunlops. So I would say that tires can also be a cause of cupping.

 

36/42

Plasma

 

I'd say, It's been a long time and the fork oil needs changing no matter what. as what's causing your tyre to cup can be one or both 1-tyre pattern ; 2- Late braking with the front, while cranked over. Which is a choice on braking, just know cupping will follow on some tyres.
Myself, I have had the least amount of cupping from late braking with my PR's .... My PR2's are to new to tell from me yet....

 

I do mostly commuting .About 43 km one way .I do like the ramps .After reading all the posts .I think 36/F and 38/R sounds about right .

 

The PR2s have been really good to me so far. I have a Dunlop Roadsmart in the rear and it's not lasting as much as I thought it would. I think it has about 3k on it and The wear bars are almost exposed. May get another 1k or 1.5k out of them. Definitely will get a PR2 for the rear when the Roadsmart gives out. My last PR2 on the rear lasted about 9-10k. Since Roadsmarts were less expensive at the time, compared to PR2s, I wanted to give it a try.

I only weigh around 165 lbs. (think string bean). The center of my front PR2 actually has a lot of tread left; the sides have worn more due to me riding the curves. The wear bars are exposed on the sides. I'll use it a bit longer then probably switch it out for another PR2 or a Power to try something new. However, aren't the sides of the PR2 the same compound as the Powers? If so, I may just stick with the PR2. I'd like to try the Quals but I'm not too impressed with Dunlops. Maybe I'll try Pirellis.

 

When I was in shape I was 175(dreaming now), So anyway, I'll stay with '42 in the rear tyre, thx.
There's a group of riders that are on the edge all the time. Some like to run PPower F / PR2 R, and some like the PR2's F&R. The ones that like the F PPower's say they like that it turns in quicker and wear out about the same time.... I'll stick with the PR2's, I don't have as many curves close by, I think for me the PP's F would wear to quick in the middle.

 

Ended up putting a new PR2 on the Front again. :thumbsup:

Just finished my 1000mile overnighter through some of the best twisties the middle of our state has to offer and decided to think about your late braking and cupping comment. Supprisingly found I was holding the lever very slightly on some of the tighter corners with just my index or middle finger as I was leaning then releasing fully at about 25% into the corner, wasn't doing any braking best I could come up trying different corners with and without was holding it lightly seemed to add some feel to the front end as you transition into the lean....

Anyway have stopped it without any loss of confidence and will see if the cupping goes away, again had over 9000miles on the front and the cupping was slight so felt the R2s have served me well enough to stay with my sports tyres equiped friends R1 and 'Blade everywhere.