18 inch or 16 inch rear wheel

[tmikeyb]

I'm working on an XS2 that I bought at auction last year. Generally I prefer originality in all of my bikes and other vehicles. But this bike has a 16 inch rear rim laced up to the original 72 hub, and I need to decide whether to reuse the 16 inch or replace it with a more original style 18 inch rear wheel. I know that some of the later XS650s came with 16 inch rear wheels on them. So, I'm really interested in the pros and cons of the actual ride and handling differences between the 18 inch narrower rim and the wider 16 inch. Either way, I need to buy a new rear tire, and I just need to decide which to buy. Interested in your experiences, and opinions.

 

[Bob Wegman]

I had a 16 inch on a 79 Special, and my 80 Special II came with a 16, which I switched to a 18 inch rear wheel. I didn't notice much difference between the two. I think the 16 tire had a taller profile than the 18 does, so the circumference of both are maybe the same or close. I think the transmission ratios and the overall gearing is the same on both bikes, so that makes me think there isn't much difference. The 16 probably has a little more tire contact on the road compared to the 18 because the width is wider. I like the look of the 18 better myself. Just my 2 cents.

 

[nj1639]

18" are good for the twisties but will let you know about the tar road snakes on the straightaways.
16" are better with the tar road snakes but dampen the response in the twists.
Other opinions may vary.

 

[JJames]

Can you post some pics. From what I've heard. There is not that much to be gained by going to the 18" rim on the Specials, but visually, it's hard to imagine the 16" wheel on the XS2.

 

[tmikeyb]

Can you post some pics. From what I've heard. There is not that much to be gained by going to the 18" rim on the Specials, but visually, it's hard to imagine the 16" wheel on the XS2.

I'll take a couple pics tomorrow. I realize that it's a little unusual having a 16 inch rim on a 1972. That's just the way that it came to me.

 

[jetmechmarty]

I think the 16 tire had a taller profile than the 18 does, so the circumference of both are maybe the same or close.

If you do the math, they work out to be very close if you’re comparing a 110/90-18 to a 130/90-16.

 

[drgonzo]

18

 

[tmikeyb]

One of you asked for a picture of my XS2 with the 16 inch rear wheel. Sorry for the delay, but here it is. The bike had extended fork on it when I got it. I've got stock sized tubes on it now. The next thing to go will be the mini-apes.

 

[Grewth]

Looks pretty good to me.
If the rim and spokes are in decent condition I'd keep it.

 

[willis]

Tmikeyb, where did you source your replacement fork tubes? I just scored a 72 as well and it has extended tubes that need to go.

 

[tmikeyb]

Tmikeyb, where did you source your replacement fork tubes? I just scored a 72 as well and it has extended tubes that need to go.

Tmikeyb, where did you source your replacement fork tubes? I just scored a 72 as well and it has extended tubes that need to go.

I got the standard tubes off of a parts bike that I bought. I'm pretty sure that Mikes XS has them though. I'm thinking that I saw them on his website.

 

[5twins]

Yes, that wheel doesn't look too bad on there, I'd run with it for now. Just be on the look out for a 2.15 x 18 36 spoke rim. If you're patient, you should be able to find a good deal on one eventually.

For handlebars, I highly recommend the Euro bar, most comfortable bar on the planet in my opinion, look "right" too .....