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Discussion Starter · #1 ·
I want to put touring tires on my 1982 CM450 Custom. I commute 50 miles per day in city traffic and just want the hard rubber and the mileage. The only tires I can find that are exactly the right size are Kendras (soft rubber) which are not touring tires, and other similar cheap brands ... or knobbies which is not what i want.

The OEM sizes are 3.50-18 (front) and 4.60-16 (rear). That seems to correspond to 100/90-18 and 120/90-16.

I found Metzler Marathon 880 tires in sizes: 100/90-18 and 130/90-16.

1. Does anyone know of hard tires that will fit this bike?
2. The Metzler 130 tire mentioned above is sold as a "front". Can it be used as a rear?
3. What modifications are needed to mount a 130/90 on the rear? I can see that the chainguard would have to be notched out ... is that a reasonable idea? What other mods would be needed? Is this worth the effort?
4. What would you do?

Premium Member
24,208 Posts
I'm running Michelin Commanders on the road bike but I also have a 19" front wheel. They don't have a 100/90/18 front
Running a 130 rear is fine. The only mod is to move the rear brake stay outboard of it mounting bracket. Chain guard will still have clearance, @1/4".
If the tire is a sold as a front or rear that means the construction of the tire is specific to that position, IE; front is front only.
The 18" wheel can be easily replaced with one from a CB450SC Nighthawk, they ran a 19" front, and is a direct swap as long as you stick with the same style wheel. Later models had the cast wheels and may not line up right
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