www.zxrworld.co.uk

I was wondering what the biggest (widest) possible tyre size is that can be fitted to a standard ZXR400 L rear wheel. I know that they have a 160 as standard.

Can one go bigger without the tyre rubbing on anything, and will it fit the standard rim?

I think you can for a 170 without the tyre rubbing, but why go to a larger rear tyre?

didnt this come up a few weeks back?

every tyre is designed to go on a certain sized rim. I guess you shouldnt have any problems getting a 170 on and a 180 will probably fit if you reduce the aspect ratio accordingly.
However, why on earth you would want to do this I dont understand. you'll just make the bike turn in slower - but if you want to ride in straight lines go for it

Wouldn't a slightly wider tyre have more surface area to create better grip during cornering? If so, wouldn't the extra grip be worth the slightly slower turn-in speed?

have you ever tried cornering on a superdream??

Silly question, but what the heck is a Superdream??

MonkeyBusiness wrote:Wouldn't a slightly wider tyre have more surface area to create better grip during cornering? If so, wouldn't the extra grip be worth the slightly slower turn-in speed?

yes, you will increase the contact patch, but you dont need to do this on a ZXR. You have bikes putting out almost 3 times the ZXRs power and they are only running a 180 rear

and if the standard tyre size has enough grip to start decking out bits of the bike (pegs, exhaust, etc) then is there any point increasing it as you can't lean any further anyway, and hence can't go faster.

MonkeyBusiness wrote:Silly question, but what the heck is a Superdream??

LOL! case closed.
i think a bot has posted in information by the way

superman wrote:LOL! case closed.
i think a bot has posted in information by the way

seen it deleted it

Wicked,
im gona try to post that membership of today iv just put it in an envilope, went off for the bank holiday without writing the address down (that was daft). anyway all i need now is a stamp.

Thanks all for the insightful feedback. So, I suppose, the only reason left to increase the size of the tyre would be that the bike would look like a bigger bike i.e. ZX6R.

going back to the original question what is the width of the zxr400 wheel?

Well, the manual says that a 160 tyre is standard at the rear, and 120 in the front.