Tyre issue?

[SMOKEU]

I recently had a new Michelin PP3 front tyre fitted to my SRAD, and so far I'd done about 40km of riding, most of which was on the Cashmere hills doing some gentle turns to wear the tyre in. Then today I took it up in the wet, and as I was following a group of slow cars I was riding really slowly, no more than about 30kmh down a gentle slight downhill corner, and I felt the bike start to slide for no noticeable reason. I didn't see any gravel on the road. It didn't feel like a rear wheel slide, although it could have been both wheels but probably just the front that was sliding. I managed to keep it upright by putting my foot down on the ground which kept it from going shiny side down, but it scared the fuck out of me. So it probably just the fact that the tyre isn't scrubbed in yet? It doesn't look shiny except for about the last 15mm on each side as I haven't had it leaned over far yet.

[Trade_nancy]

Likely due to new tyre..but can't discount road variables and your brain telling u that cos you had on a new tyre - something bad would happen. If u had on the old tyre it may have happened and you would discount the event as nothing out of the ordinary.
I put a PR3 on front of my Triumph Sprint GT just before going south for the Burt Munro and as anyone who went on the Tuesday sailing knows - it rained cats and donkeys from Picton to CHCH. Bike with pillion, full side bags and overloaded rear top bag never felt more planted in all it's life with me into all turns. Had a Slipstone BT023 on before and it wore well and rode OK - but didn't inspire me to lean it in good like this front piece did and I don't know what else changed - cept for the tyre... it felt safe(r).
I put 200km on it 1st though.
What u could have done is do some varied riding increasing lean angle every 20km or so - over 1-2 rides...doing 100+ k. Doing the slow and gentle turns may have helped only in scruffing middle section.
Riding on trail gravel is a good idea for scrub in. Luckily my 50 metre driveway is just that. Unluckily it still is in winter with mud and slippery gravel.

[slofox]

Arrrrgh! 'tis the demon of skid - 'e be art to tear thine arse asunder oooarrrrrgh! (:)

[YellowDog]

My PR3s are by far the best wet weather tyre I have ever used.

Yes I did notice mine as being a bit slippery for a couple of days (140Km), but I was lucky enough not to encounter any wet weather.

It could have been sabotage

[ellipsis]

...diesel...light rain...

[Jantar]

I recently had a new Michelin PP3 front tyre fitted to my SRAD, .... Then today I took it up in the wet, and ..... I was riding really slowly, no more than about 30kmh down a gentle slight downhill corner, and I felt the bike start to slide for no noticeable reason........

You have answered your own question. PP3, not PR3, needs to be kept hot to obtain its grip. I am often amazed at the number of riders who expect sport tyres to give the same amount of grip as road tyres in slow cold conditions. Unless you are riding hard, in dry conditions, then a road tyre will give better grip. Its when you are pushing hard, and the tyre is hot, that sports tyres come into their own.

[SVboy]

You have answered your own question. PP3, not PR3, needs to be kept hot to obtain its grip. I am often amazed at the number of riders who expect sport tyres to give the same amount of grip as road tyres in slow cold conditions. Unless you are riding hard, in dry conditions, then a road tyre will give better grip. Its when you are pushing hard, and the tyre is hot, that sports tyres come into their own.

^^"This"^^

[SPP]

^^"This"^^

Seriously? 30kmh gentle corner. Michelin must have gone to shit then.

[SVboy]

You were there? How wet? Bloody wet at times here recently. Bit of grit from roading repairs perhaps, a bit of diesel from a bus or cmpervan perhaps...PR3 would cope a lot better with those factors than a cold new PP3. Sounds like you know better?

[SPP]

You were there? How wet? Bloody wet at times here recently. Bit of grit from roading repairs perhaps, a bit of diesel from a bus or cmpervan perhaps...PR3 would cope a lot better with those factors than a cold new PP3. Sounds like you know better?

nope wasn't, but you knew that.

What I do know is I've ridden quite a few different sport tyres in some pretty atrocious rain and all were actually really bloody good (ok supercorsas were shit but the rest were fine)

A 30kmh gentle corner slide because it was a sport tyre not up to temp? Difficult to swallow.

I don't know if a PR3 would have coped better or not. I've never ridden on them and unlikely to, I've wont use ST tyres and PR2 can be thanked for that but that's my own bias.

[actungbaby]

nope wasn't, but you knew that.

What I do know is I've ridden quite a few different sport tyres in some pretty atrocious rain and all were actually really bloody good (ok supercorsas were shit but the rest were fine)

A 30kmh gentle corner slide because it was a sport tyre not up to temp? Difficult to swallow.

I don't know if a PR3 would have coped better or not. I've never ridden on them and unlikely to, I've wont use ST tyres and PR2 can be thanked for that but that's my own bias.

Probley just fact new tires and yuor thinking about that plus cars getting in the way.

My shinko rear i was like 30 kph just getting up to speed and rode on painted cycle

Lane oh dear lord bloody thing slide . freaked me out never done it again but yeah.

It was new at the time ( rode the cbr 900 other day out roundabout ) i can

accerate quite hard on vfr 750 tryed the same on cbr and bloody norah bike started drifting

sideways its okay at time because you just go okay its bit sideways ;-)

[SPP]

Wish I was a believer but I‘m not.

PR2s and Z6s on a 600RR and 636 were just plain wrong (for me). Just as many sketchy moments as any sport tyre but liked to step out doing it.

It seems my own experience with ‘road’ tyres is the opposite of everyone else. I must be doing it wrong or it's not that cut and dry.

[Jantar]

... I must be doing it wrong or it's not that cut and dry.

It isn't that cut and dry. The main difference between sports tyres and road tyres is the operating temperature. Sports tyres are generally stickier when hot, but not as good when cold, and compared to road tyres, have a narrower operating temperature range. We are not talking big differences here as the manufacturers know that sports tyres are also going to be used on the road, but still a noticeable effect. This does not reflect pure race tyres which have to be kept really warm to work correctly.

If your riding style is rapid acceleration and hard braking, accompanied by vigorous cornering then sportier tyres should be your choice. If your riding is smoother and and more relaxed over longer distances then more road oriented should be your choice.

[caspernz]

Mostly down to the road surface I'd venture, small amount due to the new tyre. PP3 and PR3 will perform much the same under the conditions described, and yep I've used PR3 and PP in heavy rain. If you're sliding at 30 clicks it's got sod all to do with tyre temp...but hey, your tyreman will tell you the same thing if you ask

[SMOKEU]

You have answered your own question. PP3, not PR3, needs to be kept hot to obtain its grip. I am often amazed at the number of riders who expect sport tyres to give the same amount of grip as road tyres in slow cold conditions. Unless you are riding hard, in dry conditions, then a road tyre will give better grip. Its when you are pushing hard, and the tyre is hot, that sports tyres come into their own.

I've got a Michelin PP 2CT on the rear, and had a normal PP on the front before, and never had any problems with grip even when riding gently.