17 or 18 inch rim to place a 21

[Harvey]

2023 Yamaha Tennery, 700 looking the super motor this thing thinking about putting 17 or 18 inch front rim and wider back rim may be a 170 tire. What are your thoughts street tires of course

Edited July 29, 2023 by Harvey

[Liquidape]

People have done Supermoto conversions to 17” wheels front and back.
here is a prime example - search the site for “Aleks T700 Supermoto build!”

[Windblown]

If you do a search here there are threads on the subject. Here's a good one: 

 

Edited July 31, 2023 by Windblown

[vagrant318]

I'd do a 19 front 17 rear as then you could still run knobbys if you wanted but still have better road handling.