Topic: Ideal tire size for the 750K

[rhinoracer]

I'll start lacing the new rims pretty soon, so it's time to start looking into and saving for new rubber. I was planning on using the crappy donuts that came with my crappy bike but the rims are so shiny it makes them look even crappier.

So I read several threads, stock sizes are F 3.25-19, R 4.0-18. Hondaman recommends F 100/90-19, R 120/90-18. Mathematically there's a considerable difference in width, but how do they physically compare, same brand same model?

Which are better suited for the heft of this bike?

[jdigga]

Bump...

I'm almost ready for new tires but the PO put a 130 on the rear and I'd like to go to proper sizes.  (My rear is 17 though.)

[eldar]

Well the earlier 750s had narrower rims. The 77/78 K bikes seem to do very well with a 110/90 front and 130/90 rear.

[SteveD CB500F]

In their day, we didn't have all this fancy 110/120/130 stuff. Just good old inches.

We all aspired to 425/85 rears on the 18 inch wheel - that corresponds to 110/85 or 120/90

[andy750]

Tire on the bike is a 120/90/18 (Dunlop GT501) and one off the bike is a 110/90/18 (bt-45)  - both cb750k wheels -







cheers
Andy

[rhinoracer]

Tire on the bike is a 120/90/18 (Dunlop GT501) and one off the bike is a 110/90/18 (bt-45)  - both cb750k wheels -

cheers
Andy

Did you move to the 110 for any particular reason?

[andy750]

Ive used the 120/90/18 in the past for many miles and wanted to return to stock to see if there was much off a difference (and after reading forum discussions on the topic). For me...I like the 110 on the rear of my cafe bike - which is a different set up from my stock bike with the 120 entirely so hard to accurately compare - but both corner well and both handle great. So much of a difference? Well hard to say on such different set ups - the both work for me. The wear patterns however may be different (as Llyod has mentioned in the past - see past threads on this).

cheers
Andy