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Online ColinXCX

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Max tyre width
« on: March 19, 2019, 01:59:58 PM »
I've managed to get some roadie wheels for my XCX, they are being blasted and painted at the moment. Now I have to decide on tyres and sizes, those wheels will be road use only. I've seen 110/80/19 and 150/70/17 that seems to be normal sizes but was wondering if 120/70/19 and 170/60/17 tyres would be OK for the rims. I want as much rubber as possible within reason on the bike, I also want radials fitted. I'm not looking for advice on what tyre to use just the sizes. Any help appreciated. Thanks.

Offline KildareMan

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Re: Max tyre width
« Reply #1 on: March 19, 2019, 02:33:53 PM »
The 110/80 19 is the alternative Triumph approved size. 

120/70 might not any better than the 110 as it would be a flatter profile than the 110 and harder to turn.

But it's your money and your choice.
Stupid is as stupid does.
IRL via GB & CL

Offline AvgBear

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Re: Max tyre width
« Reply #2 on: March 19, 2019, 03:34:50 PM »
Skinny tires rule:
"I've a fine felt hat and a strong pair of brogues
and I've rosin in my pocket for my bow.
My fiddle strings are new and I've learned a tune or two
and I'm well prepared to ramble I must go."
Tommy Makem

Offline chuckxc

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Re: Max tyre width
« Reply #3 on: March 19, 2019, 08:16:47 PM »
Manufacturers specify a particular tyre size for good reason, based on analysis and track testing. Their specs are optimized for the bike. If wider tyre were better, and fully tested, they would ofer that as an alternative.
And, consider your insurers attitude if you have an accident with non-spec wheels/tyres. IMO, I wouldn't.
Laterally unstable unless moving.

Online ColinXCX

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Re: Max tyre width
« Reply #4 on: March 19, 2019, 08:32:51 PM »
Thanks for the replies, I've ordered some 110/80/19 and 150/70/17 tyres. Hopefully will get the wheels on the bike next week.

Offline chuckxc

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Re: Max tyre width
« Reply #5 on: March 20, 2019, 02:32:05 AM »
Good decision. The OEM spec tyre width was chosen, among other reasons, so that you still have the rubber on the road while you lean the bike over until the "lean indicators", i.e. pegs, scrape the ground.
Any wider, no benefit, the peg is still dragging.

Laterally unstable unless moving.

 


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