78 GS550E tire width question

[ReverendDavid]

I have a few questions about tires, you'll have to forgive me if they end up being dumb questions.
What are the widest tires I could put on a 78 GS550E, the stock tires just seem a little scrawny to me (I'm getting old I guess). What would be a good way to get wider tread on it? If I change the swingarm and forks out, what kind of options do I have?

[BassCliff]

Hi,

I believe your bike came stock with rims that are 3.25x19 on the front and 3.75x18 on the rear. The absolute widest tires I would use are 100/90 on the front and 120/90 on the rear. But the bike will probably handle better with 90/90 on the front and 110/90 on the rear. Modifications to fit wider tires would not be cost effective, unless you just enjoy that kind of thing and have the fabrication skills to fit more modern components.


Thank you for your indulgence,

BassCliff

[ReverendDavid]

I'm an aviation maintenance technician by trade and a constant tinkerer by hobby. I enjoy tearing things apart and making them 'mine'.