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Old 09-24-2010, 10:07 PM   #16
EvilGenius
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Old 08-29-2014, 05:05 PM   #17
Dave in Wi
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What's the latest thinking on a current make & model for a car tire on a Burgman 650? I've Googled a Bridgestone 165/65 R14 Potenza RE92, but the post was a few years old.

It's for my dad, he has a trike kit and needs a new tire soon.
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Old 08-29-2014, 07:40 PM   #18
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Where are all the safetycrats? This must be even more dangerous than riding without ABS. Certain death. NOT. Back when I had a Goldwing, I rode someone else's GW with a car tire on the back. It handled fine. I was going to put one on mine, but the transmission gave out first. The big benefit to running a car tire on a large heavy bike is that they last twice as long as a motorcycle tire, and cost way less. Goldwings eat rear tires. It has been proven safe by tens of thousands of riders. I don't know of a single accident that has been caused because of it. This is one of those situations where reality doesn't match theory. It would be nice if motorcycle tire companies made tires that lasted longer and cost less. But they don't.

As for Dynabeads, never tried them. I have a home made balancing machine, and balance all my tires by hand, with weights.
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Old 08-29-2014, 08:25 PM   #19
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Your all going to DIE!

I am kidding. I have been following a forum thread elsewhere where guys are running car tires on the back of their Pacific Coasts and having great results, no wipeouts. I have seen the video, great contact, and guess what.... the rubber will wear nicely and soon have rounded corners.... and lots of tread to spare. A PC-800 is 60 pounds heavier than a Super Tenere, and 100 pounds heavier than a Sportster. The wider longer lasting tire worth the pursuit, for those willing to go outside the box.

Like the guys that say "you must run these special trailer tires for your trailer"..... we have been running car tires on trailers for years and never had a problem. Hell we run nitrogen in them and the air doesn't change in a year's time.

Ohhh, you could run nitrogen in your car tire on your bike... now you are doomed to certain death!
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Old 08-29-2014, 08:43 PM   #20
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Quote:
Originally Posted by Dave in Wi View Post
What's the latest thinking on a current make & model for a car tire on a Burgman 650? I've Googled a Bridgestone 165/65 R14 Potenza RE92, but the post was a few years old.

It's for my dad, he has a trike kit and needs a new tire soon.
You could probably get a tire shop to order a GT Radial CHAMPIRO WinterPro for you in a 155/65R14 size. It is probably the closest to stock size in a car tire as far as diameter is concerned. Only 5mm less in width than the scooter tire and only slightly taller than stock. Not to worry though. A bike can only use about 1/4 to 1/3 of the total tread width of a bike tire at any one given time anyway; whereas a car tire uses the full width of the tread most of the time. It's a factor in why they last longer than bike tires even though the car tire uses a softer rubber compound than a bike tire. Load and wear is shared across the full tread width unlike a bike tire that gets most of the wear right down the center-line of the tire.

It's not as common nor as available as the usual 165/65R14 car tires, but they are a better fit IMO.

On my Silverwing Scooter I use a 165/65R13 instead of the more commonly used and more readily available 165/70R13 car tires which is considerably taller than the stock scooter tire. But the 165/65R13 car tire is closest diameter wise and has no negative effect on the ABS brakes.
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Old 08-29-2014, 08:53 PM   #21
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Quote:
Originally Posted by lucky6600 View Post
I like the way you think, but how are you going to turn? I think my life is worth more than that......
Ya turn like anybody else that runs a bike tire down til it squares off a bit. You can handle that... right? Sure it's not the same as a fresh new bike tire, but you get used to it... Nothing difficult or mysterious about it.

Just a guy.............. with his scooter.......... and a car tire
http://www.advrider.com/forums//show....php?t=1005377
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Old 09-02-2014, 03:32 AM   #22
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I continually notice that those who choose to "darkside" take little notice that a motor vehicle tyre is 'sandwiched' between TWO interfaces - not just dealing with ONE interface.

Certainly, a passenger tyre makes contact with a Road Surface and a motorcycle tyre (also) is in contact with a Road Surface. That's our FIRST interface.

Unfortunately there remains a SECOND interface. I'm referring to the Rim that the tyre is to be jammed onto.

Tyre designers choose different profile, radius, seat and flange measurements when Passenger Rims and Motorcycle Rims came off their respective drawing boards! Even the seat diameter, in each case, have a slight difference in circumference. That last incompatibility is why excessive air-pressure is commonly used when trying to force the passenger tyre beads over the seating area on the slightly larger motorcycle rim!

Now if one is choosing to "greyside" (defined here as fitting a passenger rim onto the motorcycle's hub & axle) -- that is different! The passenger tyre is then able to be mounted onto a rim designed for it.

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Old 09-02-2014, 03:44 AM   #23
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You know you're gonna die for sure running a car tire on your scooter.

I read that on the internet
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Old 09-02-2014, 04:28 AM   #24
Dave in Wi
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Thanks Bandito2 for some useful information.
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Old 09-02-2014, 05:33 AM   #25
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Quote:
Originally Posted by klaviator View Post
You know you're gonna die for sure running a car tire on your scooter.

I read that on the internet
Not really the vehicle, but (as I stated earlier) the tyre should be mounted on a compatible rim.

16 cars on two wheels (YouTube)

Note how these Renault automobiles are driven, using passenger tyres, but they are using passenger rims so the tyres are properly mounted.
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Old 09-02-2014, 12:37 PM   #26
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Quote:
Originally Posted by vortexau View Post
Not really the vehicle, but (as I stated earlier) the tyre should be mounted on a compatible rim.

16 cars on two wheels (YouTube)

Note how these Renault automobiles are driven, using passenger tyres, but they are using passenger rims so the tyres are properly mounted.
Interesting video, but largely irrelevant. When motorcycles use passenger vehicle tires, the load on the tires is not applied in the same way. Mostly motorcycles load the tires on a line from where the tread touches the road on up to the axle, not at the near 45 degree angle as shown in the videos. There is barely any lateral (sideways) loading going on with motorcycles. Certainly nowhere near to the degree that a car imposes in its tires.

It is understood that the rims are different.... but that does not automatically mean that the motorcycle rim will not support the passenger vehicle tire well enough. In practice, apparently they work well enough. Millions of collective miles of car tire use on bikes and I've not seen nor heard of any car tire bead failures on bikes. And if it has happened before then I would venture that it has not happened any more often than it has for bike tires on bike rims.

Get over it.... Sure they are different, but they still work... and safely enough. There has been virtually no hard verifiable evidence, nothing to indicate the contrary. And as similarly stated before: Millions of collective miles of car tire use on bikes without incident has shown that it can be done. And done at least as safely as standard bike tires.

In jolly old England, maybe even most of Europe it seems they ban/outlaw the practice of a car tyre use on motorbikes... Is it the same for those in the land down under as well? Too bad for you if it is banned.
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Old 09-02-2014, 12:52 PM   #27
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Keep in mind the weight of those passenger vehicles vs the weight of a motorcycles..

Forces required to unseat the tire bead from an inflated car tire from a motorcycle rim are not likely to be generated by a motorcycle, under normal (99.9%) operating parameters.
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