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Manky Monkey Motors > Technical Section > Bike Tech > Car tyre onto motorbike rim?
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Author Topic: Car tyre onto motorbike rim?  (Read 4485 times)
kapri
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« on: March 05, 2014, 05:46:36 PM »
Anyone done this at all and did you have issues with the actual fitting?

Just had a 130/90 x15 bike tyre removed and replaced with a 145/80x15 car tyre I had in my garage . They have struggled to get the bead over the inner retaining lip ie it's on the rim but won't blow up. It's held over 100psi without locating correctly.
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Olds
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« Reply #1 on: March 05, 2014, 07:03:08 PM »
Struggled a bit to fit the 19" car tyre on the front, but once it was on it located perfectly on inflation. The only time I've had problems was with the 170/80x15 on the back of my bike. Had to warm the tyre and use plenty of lubricant to get it to pop
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
kapri
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« Reply #2 on: March 05, 2014, 08:18:18 PM »
Strangely found posts about your size on the web  but it didn't mention trouble getting them on. My tyre place said to try warming them up as well . What did you use, local applied heat ,like heat gun , or general heat like a space heater ?

The tyre place said they thought the bead might be slightly thicker on a car tyre hence the struggle.
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Olds
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« Reply #3 on: March 05, 2014, 09:21:31 PM »
The heat is to get the sidewalls flexible enough to get the tyre onto the rim. I use a 2kw fan heater turned up to max and left in the "smallest room" with the tyre for about 30 minutes or so. The real problem was getting the tyre to seat or "pop". Once I'd lubricated the wheel rim and the tyre beads it seated ok.
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
kapri
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« Reply #4 on: March 05, 2014, 10:18:40 PM »
What did you use for lube, good old Fairly Liquid ?
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hunter
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« Reply #5 on: March 05, 2014, 11:32:31 PM »
This is a 18" car tyre on a 7" wide bike wheel,
It went on fairly easy.
http://i290.photobucket.com/albums/ll259/spares_photos/sandracer033_zps740766f7.jpg
Car tyre onto motorbike rim?
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Olds
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« Reply #6 on: March 06, 2014, 08:05:48 AM »
Quote from: kapri on March 05, 2014, 10:18:40 PM
What did you use for lube, good old Fairly Liquid ?
Nope. Swarfega. I was warned off using washing up liquid on chromed rims, many years ago. Apparently it contains salt, to stop the washing up water becoming scummy.
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Getting older but no wiser! Just using bigger hammers.
The answer to most problems, fire and lots of it.
kapri
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« Reply #7 on: March 06, 2014, 06:19:33 PM »
Didn't think about the salt thing, that's why I never use it to wash cars or when whet flatting.
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kapri
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« Reply #8 on: March 06, 2014, 06:20:22 PM »
Quote from: hunter on March 05, 2014, 11:32:31 PM
This is a 18" car tyre on a 7" wide bike wheel,
It went on fairly easy.
http://i290.photobucket.com/albums/ll259/spares_photos/sandracer033_zps740766f7.jpg
Car tyre onto motorbike rim?


Narrow tyre on a narrow rim in my case , not enough internal push:(
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