Topic: bt45 tyre 120

[neil10]

is a 120 wide tyre ok on the  sohc 750 k4   thks

[Bob550four]

on front or rear?

[andy750]

Rear it will fit fine but if I were you Id fit the stock rear size - 110 - Ive done this on my K2 -  works great. 120 will stretch it a little more and so will wear a llittle more in center. Will still work of course.

cheers
Andy

[tinyrobot]

No info to add about the size, but if you are shopping for the bt45s check out my post.  I just picked some up at a really good price.

http://forums.sohc4.net/index.php?topic=30884.0

[FunJimmy]

According to Bridgestone the minimum rim width for the BT45 120 is 2.5" and recommended width is 2.75".
That's almost 1" wider than you have available.

http://www.motorcycle-karttires.com/glamourindex.aspx?productID=3&LookupID=8

[Steve F]

a 120 on the rear should work fine.  That's what I have.

[TwoTired]

a 120 on the rear should work fine.  That's what I have.

Depends on your value of "work".

Can they be mounted and will they roll - yes.

Do you have to run at elevated tire pressures to keep the well stiff - yes.
Will they center wear much more rapidly than a tire with the proper rim width - yes.
Do they cause strange handling behavior when such abnormal wear occurs - yes.
Will they still roll when they have abnormal wear - yes
Will the rider adapt to the slowly deteriorating handling behavior - usually.  And then sing praises of how much better their brand new replacement tire is, than that old piece of crap they suffered with for far too long. 

(I may have embellished a bit of the above.) 

BTW, I've had 120s, too.

Cheers,