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200 mph plus bike tires

Posted: Wed Mar 21, 2018 11:34 pm
by lag waggon
Hi all, zr rated tires are good for up to 200mph but what brand or type of tires are 200+ rated? Rule book just says special racing tires it’s a bit vague. What are other people using?

Thanks, Nathan.

Re: 200 mph plus bike tires

Posted: Fri Mar 30, 2018 5:31 pm
by coffeesnobs
Hey Nathan,
I think all riders have the same questions.

Tyre importers and manufacturers won't talk to you when they find out where you plan on using them as they just don't have enough data to know how the tyres will hold-up on the salt for mile after mile at full noise.

Last year (our first year) ran just under 200mph and used Bridgestone RS10R's front and back, both ZR(W) rated and used by Kawasaki on their 300kmh speed restricted street bikes. The front looks unused and the rear looks like it had a light sanding in the middle 2 inches and would pass for a new tyre. Lots of others riding 200+ bikes were also using those same tyres and I didn't notice any NFHU (Not for Highway use) tyres except on Rebecca's VMax.

We had a lot of wheel spin last year and took 3 different tyres this year, 2 of them we spun fast enough to tear chunks out of them, not the fault of the tyre, if we are doing 400kmh wheel speed and 340kmh bike speed that 60kmh is all heat getting transferred out the wheel.

Our front this year was a ZR(W) but a double carcass and dual compound (very hard centre). Not a mark on it for the week. One of the rears was a matching ZR(W) double carcass and the other was a medium soft race tyre (no speed or weight ratings on race tyres). Both were new tyres, nice and recent date stamps on them too.

There was at least one entry this year running Bridgestone V01 slicks that had been grooved, not sure how comfortable I am with hand grooving and they also tore chunks out of the tyres next to each grooves after 4 odd runs. The gothca with that particular slick is I know it has a manufacturer operating temperature of 80C and 40 minutes on tyre-warmers. I've used the same tyre at Philip Island and they were wicked there but you can't do that at the salt easily and if you did, the temperature would all be out of the tyre before you hit the 1st mile marker, the cold salt surface would suck it all out. So while you would be running a tyre that is "race use" you would be using it at a much colder temperature than the manufacturer expects and recommends.

Finding tyres that are "race use" isn't easy. If you run ZR tyres, make sure the load rating is a (W) [w in brackets not just a w] and a high enough weight rating for your bike, with plenty of spare weight capacity to allow for weight transfer under acceleration.

Not much help with the race use tyres but good luck!

Re: 200 mph plus bike tires

Posted: Fri Mar 30, 2018 7:04 pm
by Stayt`ie
Bridgstone BT003, never had an issue with them,, at most 4% slip,, heaps of passes at 190 to 204,(same front and rear tires been on there for about seven years I think) one pass at 223 and this year 218(gps) :D

Re: 200 mph plus bike tires

Posted: Sat Mar 31, 2018 11:22 pm
by coffeesnobs
Nice work, there were a lot of people with tyre problems this year.

Gotcha is the 003's (and 002's) haven't been made for years.
I think the BT003 is now the RS10 and the BT002 is now the RS10R (best guess)