profile and ground speed

[Batfink]

Tony, how do you come up with the extra using a 200 wide tyre?

Are you allowing for the bigger "bow" as you try and fit it to a standard rim.

If you used a 10mm wider rim wouldn't you get the same answer as a 190 on a standard rim ?

The height of a tyre is in the profile numbers.... The first number refers the the widest part of the tire, not the rim width which for a 200/55 is 200mm and for a 190/55 is 190 mm etc.. The second number is the ratio to get the height eg 55=55% so the difference between a 190/55 and a 200/55 is

((190x.55) x 2 ) + (17x25.4).... This will work on a spreadsheet if all the brackets are confusing

((200x.55) x 2 ) + (17x25.4)...

I had to do some of the working out in my head cause I hate the iPads calculator so sorry if my final % is out.. Lol

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Tony, how do you come up with the extra using a 200 wide tyre?

Are you allowing for the bigger "bow" as you try and fit it to a standard rim.

If you used a 10mm wider rim wouldn't you get the same answer as a 190 on a standard rim ?

Dale, google tyre aspect ratios and you will get the answer. Paul.

I should read before every answer LOL. Thanks mate

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I might love numbers but I can be slow... For something interesting to all you dragsters

If you bike can handle a 5% increase to load changing to a 200/55 rear tire can effectively take nearly half a second off a 10 sec run....