I am on the TR250, but since the genuine tire is off-road, I can not clear the corner comfortably with a tire worn by on-road running. At that point TRAIL WING (ON principal) seems to be off at first glance but because it is an on-road based tire, the corner is also stable and secure, TRAIL WING (ON principal) is the second exchange.
Purchased to go to forest road with XT 250X (Motor of Celo) 130 / 80-17. The size close to the size is 5.10 - 17, but refusal came when manufacturers can not ship due to being discontinued. Although it is said to be out of stock on the catalog, since it is discontinued, it feels like it would be better to drop it from the catalog. Currently there is no off tire of this size, but since Rakuten and Michelin of the same size existed, I bought that. As a substitute until just coming, I bought Dunlop 4.60-17 and wore it and it was a feeling that I could go on unexpectedly, so if you are looking for a size that fits the 17 inch rim of 3.50, also a tire of size 4.60-17 is also an option I think that you can put it.