Tire Options for our CB1100

[SportsterDoc]

My '78 CB750F came with a tubeless Dunlop K187 Mk II on the rear and a tubeless Dunlop Gold Seal F11 on the front. I don't remember what kind of mileage I got out of them, but in those days, if you wanted good performance and longevity, you'd install a Continental K112 on the rear and a Continental RB2 on the front. That's what the R100RT's came with and lots of touring riders soon adopted them. They too were tubeless bias-ply tires and worked fine on the '78 Comstar rims (though your '76 had spokes and required tubes).

https://www.continental-tires.com/motorc...c/rb2-k112

I only find the K112 in 4" wide for 18" rim. The stock 140/70-18 are 5.5" wide.

I only find the RB2 in 16" & 19", not 18". Also, my experience with a front ribbed tire is not comfortable on rain grooves parallel to travel.

Regarding Michelin Pilot Road 3 in other posts, I am not finding them in 140/70-18

http://motorcycle.michelin.co.jp/US/en/t...ad-3.html#
I am not finding the Pilot Street Radial in 18" for the rear.

For now, the likely contenders for radial 140/70-18 are

Bridgestone BT 54
https://www.bikebandit.com/tires-tubes/m...ire/p/3360

Metzler Z8
http://www.metzeler.com/site/com/product...eract.html