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How would one know thr size of tire your bike can handle?

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How would one know thr size of tire your bike can handle?

Old 05-26-16, 05:26 AM
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morfeeis
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How would one know thr size of tire your bike can handle?

I recently purchased a r600 and one of the first things I would like to do is upgrade the tires. The ones that came with it or just fine, but I want something with the track record I know more about. It's a 2004 Cannondale r600 and it came Factory stock with 25 millimeter tires. My question is how would I find out if the r600 can deal with 28 millimeter tires? I'm ordering online so testing isn't an option.

I havw included a link to the exact bike
https://knowyourbike.com/cannondale/r600/2004

Thank you
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Old 05-26-16, 05:52 AM
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deapee
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Start here: Let me google that for you
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Old 05-26-16, 06:39 AM
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How risk averse are you?

The only way to know for sure is to test fit the tires that you are considering. Clearance issues can pop up in places you didn't anticipate so eyeballing sometimes doesn't get it done. If you ever ride with a group, and one of them has 28 mm tires, you might ask to test fit their wheels.

On the other hand, 3 mm isn't very much. If it was my bike, I'd risk it.
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Old 05-26-16, 07:06 AM
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The sizes are only relative to models of the same tire and are not even then very consistent. For example a 700x23c GP4000 is about 23, but a 25 is about 27 or so...

The only way to know for sure is to mount the tire and make sure you have clearance.

You need to check:

Top of the fork crown and brake clearance on the front
side clearance on the fork

chain stay clearance and possible the chain stay bridge
Rear brake and brake bridge

I recommend 1/4" minimum. You'd be surprised how much stuff sticks to your tires for a rotation or two and will jam up in the frame if the tires fit too closely.
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Old 05-26-16, 03:31 PM
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morfeeis
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Originally Posted by Retro Grouch
How risk averse are you?

The only way to know for sure is to test fit the tires that you are considering. Clearance issues can pop up in places you didn't anticipate so eyeballing sometimes doesn't get it done. If you ever ride with a group, and one of them has 28 mm tires, you might ask to test fit their wheels.

On the other hand, 3 mm isn't very much. If it was my bike, I'd risk it.
Originally Posted by andr0id
The sizes are only relative to models of the same tire and are not even then very consistent. For example a 700x23c GP4000 is about 23, but a 25 is about 27 or so...

The only way to know for sure is to mount the tire and make sure you have clearance.

You need to check:

Top of the fork crown and brake clearance on the front
side clearance on the fork

chain stay clearance and possible the chain stay bridge
Rear brake and brake bridge

I recommend 1/4" minimum. You'd be surprised how much stuff sticks to your tires for a rotation or two and will jam up in the frame if the tires fit too closely.
Thank you both, i am going to order them and give them a try....
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Old 05-26-16, 08:46 PM
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I put a 28 on the rear of a 1987 Cannondale "SR" frame.
Not all brands are the same though.
Some slightly smaller/bigger than others.
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