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Biggest tire for 525exc?

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A 140 Mich S12 will fit with room to spare. A 140 IRC M5B will rub a hole through the chain guard unless you sand down the outside edges of the outer knobs.

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If you check the KTM web page, it shows the 525EXC with a stock rear tire of 140/80-18" and the US models come with a 110/100

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What is the biggest tire I can put on a 2005 525EXC? Will a 120 fit????

I run the Pirelli MT16 120/100X18 ( formerly 450X18 ) , This is a huge tire. I love it on my 525. Very sensitive to air pressure. I normally run 12 psi but if it gets slick I go with 10 psi.

Corners extremely well.

Cher'o,

Dwight

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It's easy to get confused because of the old metric vs. the new metric.

I way measures the case width, the other measures the outside knobby width.

A 120 rear is the same as a 140.

A 110 rear is the same as a 130.

Depends on the brand and country really.

Same goes for the front, 90/90-21 is a 80/100-21.

The second number is what you have to look at. The profile height of the tire. Take a 120/80 tire. This has a profle height of 80% of the width. For every 10% difference down in width you can deduct 10mm from the width. Example. a 120/80X18 is same size as a 100/100X18 tire. ( Close anyway ) Forget Michelin, They don't seem to have a clue on what size they have. If you are going with Michelin ask a expert on this line for a size recommendtion.Michelin 125cc tires are 120 size. A 120/100X18 is same as old 450X18 and a 130/90X18 is similar in size also. Same as 5.10X18.

Here is a secret. A 4.10X18 is narrower than a 4.00X18. The second number is profile. A 4.10 is 10% shorter than a 4.00. This also makes in narrower. Probably closer to a 3.50 or 3.75 depending on brand.

Aren't tire size numbers fun ? !

Dwight

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The second number is what you have to look at. The profile height of the tire. Take a 120/80 tire. This has a profle height of 80% of the width. For every 10% difference down in width you can deduct 10mm from the width. Example. a 120/80X18 is same size as a 100/100X18 tire. ( Close anyway ) Forget Michelin, They don't seem to have a clue on what size they have. If you are going with Michelin ask a expert on this line for a size recommendtion.Michelin 125cc tires are 120 size. A 120/100X18 is same as old 450X18 and a 130/90X18 is similar in size also. Same as 5.10X18.

Here is a secret. A 4.10X18 is narrower than a 4.00X18. The second number is profile. A 4.10 is 10% shorter than a 4.00. This also makes in narrower. Probably closer to a 3.50 or 3.75 depending on brand.

Aren't tire size numbers fun ? !

Dwight

My head hurts now. :cry: RR.

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I just changed my Michelin s12 130/80/18130/80/18 to 140/80/18 and like the 140 because it added a little height for a few more mph!! I LIKE IT!!

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