2004 Bonneville Max Width Tyre Sizes

[jasonjbrattle]

Hi all,

I've been looking through the threads but haven't seen a discussion regarding max tyre widths for my age Bonny (2004 carb) with the 19" 17" wheels.

I have read that some say 150mm will fit the rear (will effect turn in speed though), what about the max front size though??

Regards

Jason

 

[atomsplitter]

As a general rule you can go wider on a stock rim as long as it's not crazy. The problem you run into is chain and/or fender interference. Unless you have a compelling reason for going substantially larger most bikes will accomodate a 10mm increase in width without sacrificing parts to do it. Front tire width is 100mm so it should be able to go up to 110 and not interfere with the fender.

On the 04 Bonny the front tire is mounted on a 2.5 inch rim with an aspect ratio of 90%. That means the tire is 90% as tall as it is wide. So a 100mm wide tire is 90mm sidewall. If you want to go wider to prevent interfering with the fender you'll need to drop the aspect ratio so a 110/80R19 should fit your rim.

https://www.speedaddicts.com/motorc...HLhJ6swenNupohP-xaZh1iBpdxxbvP9MaAvWwEALw_wcB

 

[jasonjbrattle]

As a general rule you can go wider on a stock rim as long as it's not crazy. The problem you run into is chain and/or fender interference. Unless you have a compelling reason for going substantially larger most bikes will accomodate a 10mm increase in width without sacrificing parts to do it. Front tire width is 100mm so it should be able to go up to 110 and not interfere with the fender.

On the 04 Bonny the front tire is mounted on a 2.5 inch rim with an aspect ration of 90%. That means the tire is 90% as tall as it is wide. So a 100mm wide tire is 90mm sidewall. If you want to go wider to prevent interfering with the fender you'll need to drop the aspect ratio so a 110/80R19 should fit your rim.

https://www.speedaddicts.com/motorc...HLhJ6swenNupohP-xaZh1iBpdxxbvP9MaAvWwEALw_wcB

Hi atomsplitter,

Thanks, that's very useful information I'll see what tyre makes cover those sizes, although I do love the Bridgestone Battlax's I have been running over the last couple of years.

Regards

JJB

 

[243jimb]

You might want to look at this before you buy.........


View: https://www.youtube.com/watch?v=M3-AE1yfibs

 

[atomsplitter]

With the small changes you don't get large differences in handling. I changed the rear tire on my old Rocket III from a Metezeler ME880 XXL 240/50R16 to a 225/55R16 Bridgestone Potenza Grid and the handling was severly affected, mostly because that's a car tire in the place of a motorcycle tire. Good news was it ran in straight lines great, bad news was it followed road camber like a blood hound and you had to really pull hard on the tiller to make it turn. Good news it lasted 6 times longer than a Metezeler, bad news I had to change the front tires 5 times for every rear tire change. Money wise the car tire was way more economical, and since I lived in Kansas where corners are spaced out by county lines, not a big problem.

 

[Vector]

Interesting

 

[jasonjbrattle]

You might want to look at this before you buy.........


View: https://www.youtube.com/watch?v=M3-AE1yfibs

That all makes sense! Small changes in the handling wouldn't be problem as there wouldn't be substantial increases in the tyre sizes. I'm sure it would take a few rides & I'd adapt to the New handling characteristics anyway..

Only one way to find out!

 

[jasonjbrattle]

With the small changes you don't get large differences in handling. I changed the rear tire on my old Rocket III from a Metezeler ME880 XXL 240/50R16 to a 225/55R16 Bridgestone Potenza Grid and the handling was severly affected, mostly because that's a car tire in the place of a motorcycle tire. Good news was it ran in straight lines great, bad news was it followed road camber like a blood hound and you had to really pull hard on the tiller to make it turn. Good news it lasted 6 times longer than a Metezeler, bad news I had to change the front tires 5 times for every rear tire change. Money wise the car tire was way more economical, and since I lived in Kansas where corners are spaced out by county lines, not a big problem.

Lol That's the opposite end of the spectrum right there!!!