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Sorry Beez, I cut and pasted the tire size for the rear and didn't change it properly. Those Avons and Bridgestones do list 120/90-17 as well. The Avons are listed as Front AND Rear use while the Bridgestones are specific to Front OR Rear use. Make sure you don't put a Front tire on the rear rim just because the size fits, the rubber structures are different and would affect handling and longevity.
Something I noticed when researching the manufacturer websites is the "H57" rated tires tend to be bias-ply types geared towards classic and/or slower machines. Faster rated tires tend to be radial-ply geared for sport oriented bikes. The bias ply are good for my riding and are usually cheaper. 100/90R19 and 120/90R17 (instead of -19 & -17) would indicate radial ply tires which would also work.
Rule of thumb seems to indicate motorcycle tires expire within 7 to 8 years of manufacture. There is a 4 digit date code stamped on the sidewall that is the week and year of manufacture (ex: 1220 = 12th week of 2020). I don't have a whole lot of experience with tires but so far I've had Metzelers that don't seem to last very long before the sidewalls are all cracked dry rot and Bridgestones and Shinkos that seem to last forever. Others likely have different experiences.
You *might* not need stems but I would do it so you know they are fresh. Like tires, the rubber degrades and may no longer provide a good seal. I've seen comments that people never change them unless they have frequent pressure loss and other people who change them every tire change. It's a judgement call. I figure I'll change mine every 2nd tire change. Maybe. BTW I ordered those ones from FortNine as I believe they are correct but I haven't received them yet to confirm they fit. I expect them in next couple days so will confirm when received.
- Dylan
Something I noticed when researching the manufacturer websites is the "H57" rated tires tend to be bias-ply types geared towards classic and/or slower machines. Faster rated tires tend to be radial-ply geared for sport oriented bikes. The bias ply are good for my riding and are usually cheaper. 100/90R19 and 120/90R17 (instead of -19 & -17) would indicate radial ply tires which would also work.
Rule of thumb seems to indicate motorcycle tires expire within 7 to 8 years of manufacture. There is a 4 digit date code stamped on the sidewall that is the week and year of manufacture (ex: 1220 = 12th week of 2020). I don't have a whole lot of experience with tires but so far I've had Metzelers that don't seem to last very long before the sidewalls are all cracked dry rot and Bridgestones and Shinkos that seem to last forever. Others likely have different experiences.
You *might* not need stems but I would do it so you know they are fresh. Like tires, the rubber degrades and may no longer provide a good seal. I've seen comments that people never change them unless they have frequent pressure loss and other people who change them every tire change. It's a judgement call. I figure I'll change mine every 2nd tire change. Maybe. BTW I ordered those ones from FortNine as I believe they are correct but I haven't received them yet to confirm they fit. I expect them in next couple days so will confirm when received.
- Dylan