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Discussion Starter #1 (Edited)
Hi everyone, I've got a 2002 Yamaha Roadstar Silverado XV1600 with sidecar. With a decent quality motorcycle tire on the back, I got less than 2,000 miles on it and the tread was worn to less than 1/16". Wouldn't pass inspection.

After doing a little wandering on the web, I found out that some riders are replacing their MC tires with car tires on the larger touring and cruiser style bikes. There seems to be a lot of discussion out there about the safety of this. Rim design and dimensions are different along with the tire designs and dimensions. Some were using over a 100 psi to get the bead to seat!

I decided to give it a try, the sidecar rig stays perpendicular to the road, like a car, so leaning into a turn and running out of rubber contacting the road is a non issue. Grossly over inflating a tire to get it to seat is a scary scenario. I hear stories here about Duro tires blowing up trying to get them to seat on TW rims. So, with this in mind, I wasn't going to go over the recommended pressure printed on the tire. Well, maybe just a little bit if I had to. :D

The old MC tire was a bear to get off, very stiff sidewalls. The car tire, a Coker Firestone Vintage Tire from Summit Racing, went on fairly easy and seated at 25 psi (with lots of soapy water).

Took the bike for a ride with and without a passenger in the sidecar. So far so good. Can't tell the difference between the 2 tires. Hopefully. I'll get better mileage out of this tire.

Any body else try this or know anyone that has? Results?




High Tech balancer.




 

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Twilight can endorse your move to "The Darkside" as he can attest to the much greater milage one can get out of a car tire. To get only 2000 miles out of a motorcycle tire seems very depressing.
 

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Well your not gonna get much out of that Firestone. I get about 3K miles out of my Coker/Becks which last about the same as the Firestones. On Cokers site the Firestones and the Becks are listed under the motorcycle tire section so dont think your actually on the dark side yet :) You probably should have gone with a real, modern car tire. Dont worry about killing yourself though, Ive got over 10K aggressive miles on my Coker/Becks that were designed for cars built before 1948 :)

 

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Discussion Starter #5
This is the one I have. Says for passenger car use and for rims 3.5-4.5 inches wide. I thought about going with a modern radial, it would be a tight fit and was concerned about squeezing them onto a 3.5" wide rim.
 

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Discussion Starter #7
150/80-16 It looked like with the old tire I had about a 1/2" clearance both sides. Thanks for help TWilight!
 

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My local Firestone store is great at finding oddball tires for me. I haven't looked for motorcycle tires or car tires for motorcycle there but they can cough up any size trailer tire I throw at them, etc. Also they will beat Tire Rack prices for me.
 

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Discussion Starter #10
Scotti, here are a couple already. Not that hard to find...just have to know what to look for.

https://www.goodyear.com/en-US/tire/search/175_60_16?

This is one Goodyear...the Assurance model, which I just happen to be running on my little Toyota, and it is a good tire.



The other is a Dunlop...Run-Flat tire.

Both of these are a 175/60-16, which WILL fit inside your swingarm...just barely...and it will lower the back of your bike about 3/8 of an inch. It will be less than a 1/2 inch lower.

I will continue searching.
Would fitting this tire on a 3.5" wide rim cause any issues?
 
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