New tyre

[trickey]

Bought a new tyre maxxis cross it pro 100-100 - 18 old tyre maxxis endure 120-90-18 . Told Elderfields it was for ktm exc 250 f . maybe a stupid question will it fit does it matter .

[stevent]

Yes I think it should fit, the numbers are the width height and diamete . Your new tyre is 20mm wider and 10mm less high.
more here http://www.americanmotorcyclist.com/Rid ... tions.aspx

[Stewie]

Bought a new tyre maxxis cross it pro 100-100 - 18 old tyre maxxis endure 120-90-18 . Told Elderfields it was for ktm exc 250 f . maybe a stupid question will it fit does it matter .

Yes I think it should fit, the numbers are the width height and diamete . Your new tyre is 20mm wider and 10mm less high.
more here http://www.americanmotorcyclist.com/Rid ... tions.aspx

The second number is the ( height ) expressed as a percentage of the first number ( width ), so if the old tyre was 120/90 ( Width 120mm Height ( 90% of 120mm ) =108mm ), and your new on is 100/100 ( Width 100mm Height 100% of 100 )=100.

So the up shot is, the tyre will fit, as the last number is the same ( 18'' rim ) its just 20mm thiner and 8mm less in the profile.

So, yep it's just smaller

Tyre sizes are one of the few things that mix metric and imperial measurements, well off to the pub for a quick 2.1133764188652Lt of beer

[trickey]

Is the new tyre any good? I shall find out. opinions please.

[Billy]

I run narrow tyres on my 200 and have never had a problem.

[Dave]

Stewie is right...

Also, to reinforce Billy's tyre preference, some people swear by thin tyres, especially in MX because it cuts through the mud and ruts way better. Try fatties and thinnies and see what works for you.

[trickey]

Had a great day out over Hindhead with my new tyre , met a mad German called frank from fleet , he had a exc 250. Really quick day very wet a slippery but tyre got me through.