why H rated tires on bikes over 70mph?

[wfojohn]

Just follow the rules, they are there for safety - YOURS. We encountered the same problem but resolved it with Avon's, available here in the states. Wave the tire rating rule for someone and watch the insurance company fold up its tent should something happen. You can have one hell of a lot of physical damage and broken equipment at under 70 mph or under 100 mph. Sorry if this rubs you wrong but this thread has no point to it. The RULES rule. John Ritter

[jaguarsurfer]

The tire requirement isn't based on what you think you can run. The requirement is based on the record in each class. If you bump the class record above the rating for the required tire you'll also bump the tire rating requirement for every vehicle in that class.

Pete

so since the record that im running against is under 70mph any tire is good?  (rules say any motorcycle tire under 70mph)
but my plan is to run more then 70mph and i dont want to run faster then my tires are rated for (i feel thats unsafe)

or can i run 115mph rated tires in the class and take the record and be safe and with in the rules?  but then that means the next runs against that time will NEED to run the H rated tires

please understand that im not trying to cheat the rules or run a set up that is unsafe.
my goal is to understand what the rule is and then see how to build to it.
 but that being said i dont think it would be right to make the 70-130mph motorcycle guys run H rated tires as i feel that over kill and hard to find in the right sizes

the BT39ss tires would be nice but are RACE tires but not H

[wfojohn]

Jag,
The Avon's will solve your problem. They are "H" rated and that is with a tube or tubeless. We had the same problem as I stated above and I had difficulty finding a tire that would work with a tube because our wheels are spoked.

[Cajun Kid]

Race Tires would have a higher speed rating than a "H"  street tire, so if your speed /class requires H rated or better... the race tire would be fine as I read the rules.

Charles

[suprf1y]

I'm also building a small bike, and found some tires that are H rated that will fit my application.

I looked at one today, and didn't see any rating on it, so I didn't buy them. My question is, how/where do I find this rating on the tire? I expectd to see something like 56H, or similar, but saw nothing.

Kenda claims that they're H, but it's a long drive to Maxton, and I don't want to take any chances.

Thanks.

Edit: Its the Kenda K671, and I would be running the same size front and back. They are not marked for position.

http://www.kendausa.com/en/home/motorcycle/street/cruiser-.aspx

[saltwheels262]

most of those tires are h rated.
speed ratings are listed in the tire size.

e.g.--100/90h-16

franey

if there is no h on the sidewall, i would find another tire.

[tomsmith]

The Heidenau 2.25-18 M3 racing

Is not only H-rated, but is designed for 50cc road racing, where speeds get up to 120mph or so.  Also, don't forget that regular tires are usually made for big bikes and are a lot heavier with more plies than needed for 50-125cc bikes.  Look at the weight carefully.  This site:

http://www.emot.nl/webwinkel/index.php?act=viewCat&catId=47

also has Heidenau 3.00-18 K65 racing, 2.75-18 K45 racing, 2.75-17 K56 racing, 2.75-16 K55 racing and some others.  The M3 is the only one I know specifically to be H-rated.

Rims are at: http://www.central-wheel.co.uk/rims/morad_rim/morad_rim.html

There are probably a lot more sites in Europe that have stuff for itty bitty bikes like my Harley Hummer.

[Dean Los Angeles]

Tom!

Is that Trebor Crunchhog driving your avatar?

Is that from Automobili Cyclops Spa? Is that a Cyclops with the XBS-V1 the world's first V1 engine?

Where is Piero Martini when we really need him!


Piero Martini demonstrating full use of Cyclops' air brakes while leading the team in Cyclops Super Sports coupes-made out of magnesium Cinzano signs -- to a 1, 2, 3 LeMans victory.  II Cyclops At LeMans August 1960.

[tomsmith]

Yep.  Cyclops is the only car to win the Indy 500, 24 hours of Le Mans and every other race worth winning.  Thanks to the wing for downforce/traction it is easily in the 400mph class at Bonneville and is suitable as a taxi in New Delhi.  My Works Harley Hummer will probably be using some of the Cyclops advanced technology as soon as I can dig it out of the debris in my garage.

[jdincau]

I still prefer the Pignatelli

[wfojohn]

Tom,
Thank you for the links, they are what I wanted before buying the Avons but could not find a source in H rated. Job well done.

[suprf1y]

I'll have to have another look at those Kendas.
I can't imagine they'd list them as H rated, and they wouldn't be.

[suprf1y]

most of those tires are h rated.
speed ratings are listed in the tire size.

e.g.--100/90h-16

franey

if there is no h on the sidewall, i would find another tire.

Bought one today, and they look good for the money.

There is no H in the size, but beside the sizing, it says 54H, so they should be fine.

[saltwheels262]

most of those tires are h rated.
speed ratings are listed in the tire size.

e.g.--100/90h-16

franey

if there is no h on the sidewall, i would find another tire.

Bought one today, and they look good for the money.

There is no H in the size, but beside the sizing, it says 54H, so they should be fine.

yes, they should be fine.

franey

[FirePowerMinis]

I am a four stroke and only plan to run in four stroke classes

I'm having a hell of a time finding H rated tires that will fit either a 1.60/1.85 x 18
Or
1.40x 17
Wheels

Newbie, same 17x1.4 wheel dilemma. 3-1/2 weeks till opening day, and an unused set of P-rated Michelin's mounted up. Duro has some skinny 17's but none in the US, or on the Google. Has any one found a suitable 2.25/2.50-ish 17?