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Slippery tire #142040 07/01/18 09:46 PM
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BillV Offline OP
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My Kenda K270 4.50-18 finally wore out and I changed to a Pirelli Scorpion A/T 120/80-18. I think that it's more like what the XT came with. I'd previously changed the front to their MT90 A/T 80/90-21 without incident. But at the second corner with the new rear, it started to slide. I caught it and drove on but was surprised as it was a familiar corner and I wasn't cornering very aggressively.

I gather that new tires have release agents that make them slippery and that, apparently, I should ride long enough for the tire to go through a heat cycle that bakes the agents off. I'm suspicious of this as the bike mainly gets ridden around town on 5-10 mile trips that shouldn't produce much heat. Does anyone have better advice? Can I use cleaners? One of my concerns is that normal riding will clean the "top" of the tread but leave the sides slippery and ready to dump me in a turn.


1995 XT225 Cobra exhaust - Town & trail
2006 GSX-R1000 - Highway
Re: Slippery tire [Re: BillV] #142041 07/01/18 11:14 PM
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#brer15 Offline
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The tires need to be ridded easy for the first 100 miles (the break in period). Easier to slide in the early stages of the break in period, than say after 50 or 60 miles.


2004 XT225 purchased new in October 2004 0 miles. Current miles over 27,000.
Re: Slippery tire [Re: BillV] #142043 07/02/18 07:35 AM
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Paul49 Offline
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Take a ride through a load of crud, dusty gravel road will do the job.


Current: 1958 Ariel 650 FH, 2014 Tiger Sport1050, 1995 XT225 Serow, 2016 Tiger 800 XRx.
Re: Slippery tire [Re: BillV] #142045 07/02/18 11:44 AM
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peejman Offline
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Yep, new tires are always slippery. It's not so much heat as it is just grinding off that slick outer layer. You've just got to break it in gradually... Gradually increase the lean angle and expect a little squirm until it's roughed in. 10-15 mins in an empty parking lot, or a trip down a gravel road is all it takes.


This shall pass, be still and know.
2006 XT225, UNI filter, ProTaper bars, MSR handguards, SS front brake line, Shinko 241's.
Re: Slippery tire [Re: BillV] #142048 07/02/18 07:56 PM
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patuca Offline
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New tires are not only slippery but once a local rider just had new tires installed and he rode the bike off-road with reduced tire pressure the same afternoon.

After riding on a muddy trail he decided to complete the trip by riding home on the highway.

He was trying to ride fast enough not to block the traffic and a deer jumped out and he panic braked. The front wheel broke the fresh bead and spun loose on the rim eventually coming off the rim and locking the wheel solid with the tire tangled in the forks.

He was okay but the front rim was toast from sliding locked-up on the pavement. I guess the moral is, if you don't have bead-lockers give the beads some time to set and dry and keep the inflation pressure up on a newly installed tire at least for while.

patuca


"this will only take a second..."
Re: Slippery tire [Re: BillV] #142050 07/03/18 07:56 AM
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Paul49 Offline
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We run 10 psi for off-road, had no probs with that, but with a puncture without a bead locker, tyre goes flat then can move on the rim & rip the tube at the valve. Not repairable then. My pal had this happen, we had to wait 3 hours for recovery.

We all fit bead lockers to the rear tyre but not always to the front, carry a spare tube if ya don't.


Current: 1958 Ariel 650 FH, 2014 Tiger Sport1050, 1995 XT225 Serow, 2016 Tiger 800 XRx.
Re: Slippery tire [Re: BillV] #142051 07/03/18 12:20 PM
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peejman Offline
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I've seen evidence of tires slipping on the rim when I rode sport bikes. Was a common thing at track days to put a line on the rim and tire to make relative movement obvious and help judge tire pressure. Not such a big deal with tubeless tires, other than screwing up the balance.

Patuca's story makes me wonder if the bead was seated correctly. I've had a few tires that took several tries to seat that last inch or two of the bead. Regardless, that would make for a bad day for sure.

And yes, carry a spare front tube and tools to change it. A 21" tube can be used for both front and rear. Obviously not ideal in the rear, but it'll get you out of the woods.


This shall pass, be still and know.
2006 XT225, UNI filter, ProTaper bars, MSR handguards, SS front brake line, Shinko 241's.

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