New CBR250RR Tyres, what are the best? Can you help?

[Racey Rider]

I agree with KK. It heats the tire up more to reduce the pressure.

[Coyote]

I've notice on my CBRs tyres that the rubber seems to be splitting(they rubber has all these cracks). This a problem? Am I gonna have to make a clearer explanation of my problem?

[Kwaka-Kid]

how old are your tyres?
typically that just means they are old and so perishing. Other then that i dont have an explaination - been getting weird liquids on them i.e petrol to speed this process up?

[Coyote]

Supposedly, the tyres were brand new when I got the bike (got it in November last year).

[Zapf]

I've notice on my CBRs tyres that the rubber seems to be splitting(they rubber has all these cracks). This a problem? Am I gonna have to make a clearer explanation of my problem?

are the cracks on the top of the blocks? / bottom of the blocks? (where it joins the rest of the tire) / or on the sidewall?

I found some wrinkles / cracks on the base of my blocks on the Dunlop D220's as well. And my bike is new (Nov last year). But then again how long has it been sitting there for..

[John]

also noticing these crack/s on the inner tred walls etc - But the trend is I bought it recently from a dealer who had it sitting in the sun for half a year, so that would explain it - oh well.

Also I vote Arrowmax, they seem to heat up real real quick in my opinion, I do real short rides now, and I can get my knee down 1 min of slow riding later, so they seem ok, but then again I'm not heavy nor is the bike. But they are utter complete arse in rain god, you havto have balls to ride them in the rain, or maybe its just because I ride them to hard, dont know myself.

[Mr Skid]

Also I vote Arrowmax, they seem to heat up real real quick in my opinion, I do real short rides now, and I can get my knee down 1 min of slow riding later, so they seem ok, but then again I'm not heavy nor is the bike. But they are utter complete arse in rain god, you havto have balls to ride them in the rain, or maybe its just because I ride them to hard, dont know myself.

Thank God, it's not just me that find Arrowmax tyres useless in the wet. They seem to let go for no good reason in the rain eh?

I think a set of sport demons will be next on the cards..

[Kwaka-Kid]

[QUOTE=paparazzi]They seem to let go for no good reason in the rain eh?QUOTE]

Maybe its the rain?

Thats good enough reason for me! cant speak from experience on those tyres but when it comes to wet riding they are all bloody slippery in my mind! With the only fond memories of road riding in the riad being on Michellin Macadams, though i have to say it was some years ago and i like to kid myself my riding has improved from there and so that throws a shadow of doubt over the idea of them performing well in the wet... Racing wise ive raced on Bridgestone BT090's and Dunlop D207GP's in the wet, and i still change opinions on them too often to make a firm judgement, its like, either way when exiting corners if i whack tha gas on they slide nearly causing me to crash and i find it hard to rule which one does it first, as its always a different day, different amount of wetness and differing temperatures aswell as differing pressures in tyres. Now im just rambling in my tiredness

ill let you guys sleep.

[R00T]

Really?!

K ill be honest and risk showing my ignorence here but firstly: my tyres to get moderatley warm in the wet, and i let them down say 2 pounds as with the extra flexing rubber they heat up more (and obviously water cooling is working against this) and in the dry where they heat up alot i pump them up like.

is that not standard practise ?

Your tyres are designed to operate at a certain pressure, as the tyre temperature increases so does the pressure, thats why we are supposed to check tyre pressures when cold.
So as the tyre heats up and the pressure increases the tyre then becomes the correct shape for normal operation, the tread on under-inflated tyres will not open up correctly and thus will not disperse water as effectively, under-inflation will also increase the stress on the sidewall and allow the tyre carcass to become concave in the centre of the contact patch with the road, effectively providing you with less grip.

Given that you will still get some heat into the tyre in the wet it will be nothing near the temprature and pressure obtained in the dry, so if this is also worsened by under-inflation you are putting yourself at quite a lot of risk.

Any professional race outfit will tell you how much difference 1 psi makes to the handling of a machine.

[Devil]

Mate where do you get your sport demons from as i have tried for my brother and no one in Hamilton will supply them yet the bros harley came with them so they are out there.

Cycletreads in Takapuna (akl) is where I got mine.

[FlyingDutchMan]

Just get the tyres that suit your needs the best. If you do mainly commuting then go for the Pirelli Sport Demon's. If you do more weekend fast rides then go for the GPR70's or Diablos. The bridgestone BT090's are dual compound, hard in the centre and soft on the outside, so you get the best of both worlds, but maybe not the best for your purposes.

Just go with the tyre that suits your needs the best.

I'm pretty sure the BT90 is a single compound. The BT45 is definitely a dual compund tyre.

[Roadrash]

i ran battleaxes on my cbr250rr on that bike i thought they were perfect,
plenty of feel and feedback