Rear Tyre/Please advise

[rude kid]

My R1 has just turned 2 years old 1,700 miles/ Mainly just short runs out and 3-4 Track days last yr. The Rear tyre still has pleanty of tred but has turned a funny shade of blue on the edges/ A friend has recomended to get them changed.

Is this true...Please help

[d3ano]

doesn't it turn blue from heat? like use after a track-day?

[DennisTheMenace]

The tyres on my ninja went like that , they are fine .

[rude kid]

I thought the same. I do remember that is was starting to get lively coming out of the corners. It was probably to do with giving it a fist full of throttle.

[stooz]

The way I understand it, exessive heat cycles will bring out the rubber colour.

Its not dangerous, but it might mean you need to alter your tyre pressures on the track. My pilot powers are recommended as 42 road, 34 track. A big difference.

Not suggesting your need to go lower, as too low will encourage heat build up.

They arent knackered though.

[DennisTheMenace]

tried lower tyre pressures on a zx12r once , never again , bikes can go sideways out of corners

[ninjaboy]

Mine go like that in cold weather, go back to normal in the summer

[Y4MER]

Just booked 2 Track days so I will let you know after this weekend.

[bennyboysvuk]

I don't think the change in colour necessarily means that much, but after that amount of time and with the track days that you've done, the tyres will have degraded somewhat from their original glorious stickyness. I'd change them if I was wanted ultimate grip, although I'd keep them if I wanted to slide the back on the track.