Topic: What tire and tire size for a 78 CB750A?

[limerence]

Hi guys,

Not sure if my IQ is too low but does the search option on this site work?

Anyhow, I was trying to find out what tires and tire size to get for a 1978 CB750A

From the factory service manual, looks like the size (and I believe it might be for all three years since theres no delineation amongst years) is:

Front: 3.5H19
Rear: 4.5H17A

Equating that to modern sizes, I was thinking about getting:

Front: 100/90-19
Rear: 120/90-17

But the matching name brand tire options are pretty much non existent. What is everyone running on their bike?

Thanks,
John

[limerence]

17 views and no response? no one else own one?

[salukispeed]

I forget what is on my 77 but will look this evening and reply (hopefully tomorrow)

[raymond10078]

You may have more luck asking this question over in the non-A forum.

The rear swingarm for the 77/78 A bikes is the same as the 77/78 K bikes.

The bikes also had the same 4.50 17" rear tire, too.

Probably a LOT more folks over in the non-A forum that will chime in.

I'd chime in - but I'm running a NOS 4.50 17 tire I bought two years ago.

[limerence]

Thanks guys. I did end up looking on the non-A forum

After searching on multiple resellers... I was able to find two matching sets in 100/90-19 and 120/90-17.

- Michelin Anakee 2 Adventure
- Bridgestone BT45V

Any experience with these?

However, if I bump the rear up one size to 130/90-17, opens it up to a couple more brands like Shinko 230's that are a little more cost effective. 130's too wide?

Will look in the non-A forum too but too lazy right now to do a search. Lol.

Thanks,
John

[dave the welder]

i am running a 130.i have no clearance problems at all. on the side wall it says its the same as a 5.10 if that helps

[lucky]

Get the AVON Roadrider 26 tires.
Front is ( reversable) 100/90-19
130/80-17 for the rear.

[JimS63]

I have a 1977 CB750A with a 130/80-17 Continental tire on the rear and I have no clearance problems at all.

[limerence]

Lucky / JimS63 - I see that Avon makes a 130/90-17 as well. Was there a reason why you guys chose the 80 over 90 aspect ratio? Would it rub?

-John

[JimS63]

Mine had the 130/80-17 on it when I bought the bike. I got a nail through the tread and out the sidewall, so I got a new tire (same size). I'm not sure about other sizes, but there are no close tolerances anywhere that I can see.