[Gln89]

Hi, I have a honda cb450k5 1972. Can I fit firestone tyres 18x450 rear and 19x400 front on stock rims..?

 

[JamesPal]

No, these are way too big. I don'T think a 4.50x18 would fit in the stock swing arm even if you had the correct rim. A 4.00 in the rear is about as big as you can go. The stock 3.25 in the front is pretty tight. Rim sizes are matched to the tire. You will change the bike's handling in a bad way if the tiire-rim do not match. There are a lot of threads on this site that discuss this.

 

[Gln89]

Hi Jim,
Is there a way I can fit these tires? I found some threads that they fit these size of tires.

I would really like some help cause I like these tires.

 

[J-T]

Here's a good read on the subject:

http://www.hondatwins.net/forums/52...rim-tire-sizing-important-considerations.html