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Post by Tobyjugs on Mar 28, 2016 21:18:52 GMT 1
Hello chaps hope you all had a good easter?
I need to buy a pair of tyre's for my RD 350lc after looking at the old tyre's i had lying around i noticed that there were two different profiles 110/80x18 and 110/90x18 Which is the correct size for the bike?
Does anyone have experience of using both sizes?
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Post by arrow on Mar 28, 2016 21:29:35 GMT 1
They are both sizes for the back wheel. The 90 looks more retro.
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Post by arrow on Mar 28, 2016 21:35:16 GMT 1
Think it's 90/90X18 for the front, may stand corrected.
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Post by Tobyjugs on Mar 28, 2016 21:35:39 GMT 1
I was surprised how much wider the 90 looked compared to the 80 profile. This was two different make 90 tyres compared with three different 80 tyres
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Post by arrow on Mar 28, 2016 21:38:00 GMT 1
I was surprised how much wider the 90 looked compared to the 80 profile. This was two different make 90 tyres compared with three different 80 tyres ?? The 80 and 90 are exactly the same width. I guess you mean distance from rim to tread? |
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Post by Tobyjugs on Mar 28, 2016 21:43:29 GMT 1
Yes thats what i find confusing. Having said that they are all without rim now, but even on the rims you can see a difference.
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Post by Delbert on Mar 28, 2016 21:53:48 GMT 1
im sure the 80 is the standard size ,, I had a 90 fitted to mine when I bought it .. fitting a nice new pair of avon road riders in the correct sizes has transformed the bike ,, the 90 may give you a slightly quicker turn in if that's your thing , personally don't like messing with tyre sizes
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Post by arrow on Mar 28, 2016 22:06:42 GMT 1
im sure the 80 is the standard size ,, I had a 90 fitted to mine when I bought it .. fitting a nice new pair of avon road riders in the correct sizes has transformed the bike ,, the 90 may give you a slightly quicker turn in if that's your thing , personally don't like messing with tyre sizes The correct sizes are imperial of course. |
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Post by Tobyjugs on Mar 28, 2016 22:13:02 GMT 1
Trawling through the tyre threads did not give me any insight as to which was standard both sizes are regularly mentioned
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Post by Tobyjugs on Mar 28, 2016 22:16:43 GMT 1
im sure the 80 is the standard size ,, I had a 90 fitted to mine when I bought it .. fitting a nice new pair of avon road riders in the correct sizes has transformed the bike ,, the 90 may give you a slightly quicker turn in if that's your thing , personally don't like messing with tyre sizes The correct sizes are imperial of course. Ha Ha you just made me laugh arrow, I've got one of those as well. That one is almost identical in size to the 80 profile tyres |
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Post by arrow on Mar 28, 2016 22:36:10 GMT 1
Really, I thought the 90 was the nearest match to original. Thanks for the confirmation.
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Post by Delbert on Mar 29, 2016 3:37:03 GMT 1
Not sure if the same principle applies to motorcycle tyres ,, but a standard car tyre profile would be 80 , so if a tyre was marked 155 x 13 it would in fact be 155/80/13
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Post by KevtheRev on Mar 29, 2016 4:31:08 GMT 1
Yep the 80 is the recommended size and the Avons do seem to work well . The larger profile does affect the steering quite a bit .
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Post by Tobyjugs on Mar 29, 2016 12:04:34 GMT 1
Really, I thought the 90 was the nearest match to original. Thanks for the confirmation. Sorry Arrow you were correct, yesterday i was only looking at the width difference. I have made two pictures so you can see the difference between the three sizes  The middle tyre is a 110/80x18 and the tyre on the right is a 110/90x18 you can see that the 90 profile is bigger allround  In the second picture the tyre on the left is 4.00x18 and it is the tallest of all three tyres I assume then that this is the original size? I have used these three as examples for you to see but they are all much the same size when compared to other tyres of the same profile The middle tyre looks good but when it was on the rim it is slightly deformed unless you like 4 bar in your back tyre. Another question i'm not sure how it works but the right hand tyre looks in good shape but has never been on a rim whilst in my possession. On the side wall is written tubless, can i put this tyre on a rim with a tube inside or do i have to ensure the tyres i buy are for tubes only? |
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Post by arrow on Mar 29, 2016 12:42:28 GMT 1
I have used tubeless tyres with tubes in. No problem. Some people don't use tubes, much debate there. The issue is with the type of casting and the ability for the rim to seal correctly on the rim as they are a different profile to tubeless rims.
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Post by bare on Mar 30, 2016 0:53:16 GMT 1
Both outer tires show a flattened centre tread .. or at least seem to.
Suggesting small cause to worry about handling benefits :-)
New tires have those wee rubber threads Everywhere, those tires have seen use, believe it or not.
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Post by Tobyjugs on Mar 30, 2016 8:14:56 GMT 1
Both outer tires show a flattened centre tread .. or at least seem to. Suggesting small cause to worry about handling benefits :-) New tires have those wee rubber threads Everywhere, those tires have seen use, believe it or not. They are all destined for the bin except the one on the right which has still got of meat left, this one will go on my spare rim. |
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Post by KevtheRev on Mar 30, 2016 12:12:06 GMT 1
Both outer tires show a flattened centre tread .. or at least seem to. Suggesting small cause to worry about handling benefits :-) New tires have those wee rubber threads Everywhere, those tires have seen use, believe it or not. Yep ! See them chicken stripes a mile away ! lol |
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