Topic: Widest tire possible and fit for riding for an 18 x 1.85 rear rim?

[cocinero196]

Any thoughts on the widest tire possible and fit for riding for an 18 x 1.85 rear rim?
Will a 4.5 x 18 or a 120 x 18 tire still be okay for the 1.85 rim width?

[cocinero196]

120 is pretty wide depending upon the aspect ratio. Best to stick with a 110 or 4.10.

Thanks! I really wanted the look of the 120 though

[70CB750]

120 is pretty wide depending upon the aspect ratio. Best to stick with a 110 or 4.10.

Thanks! I really wanted the look of the 120 though

The look helps very little in tight corners 

Your bike, your call.

[wowbagger]

This does not take bike geometry or handling into account but it tells you what tire sizes can be installed on what rims widths:

[CBGhia]

yeah, the 100 should be the right size for that skinny little guy.

Edit:   Sorry, I was wrong.  110 is what I run on my 550 and I guess it has the same size rim. I put a 120 on there once and the handling really suffered.

[Powderman]

Will it fit, yes. Will it detract from the handling characteristics, yes. fitting a tire that wide on a skinny rim will pinch the side walls giving the tire more crown that if it were mounted on a proper size rim. I would not recommend a tire that big on that rim if I planned on actually riding the bike.

[Old Moe Toe]

If you MUST have a fatter back tire you can lace up a K7 (17inch) rear rim to your hub and put on a 130mm wide tire. I did that on my K2 and am very happy with it. The overall outside diameter of the tire was within a millimeter or 2 of the original 100mm wide tire. Only thing I had to do was cut a small section out of the chain guard to stop the wider tire rubbing.

[cocinero196]

Thanks guys! Will just probably get a wider rim to accommodate the fatter tire
I'd like to stick to size 18, will 2.15 be okay for a 120 tire?

[turboed13b]

I went from a 110 to a 120 unless you are pushing hard into the corners and dragging knee you won't notice a difference.

[cocinero196]

I went from a 110 to a 120 unless you are pushing hard into the corners and dragging knee you won't notice a difference.

What was the size of your rim?

[cocinero196]

I'd like to stick to size 18, will 2.15 be okay for a 120 tire?

I'd bump to a 2.5". There's no clearance problems with that rim, and it will support the 120 tire perfectly.

Got it! but I would still have to get a 40 spoke rim for the oem hub to match right?
Thanks, cal! Will be bugging you soon if I pull the trigger on an M-unit

[turboed13b]

I went from a 110 to a 120 unless you are pushing hard into the corners and dragging knee you won't notice a difference.

What was the size of your rim?

1.85 I am moving tona 2.15 here soon.