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  #11  
Old 09-03-2014, 08:40 PM
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iamovru iamovru is offline
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Originally Posted by CombatYoga View Post
What are the advantages/disadvantages of running the stock 140/80 (somewhat odd) tire size on the '14 XC300R?

140 means there is a sizable patch of meat on the ground, and 80% of 140 means 112mm of sidewall height. That's in the same league as a 120/90 or more common tire.

I replaced my rear with the same 140/80, but was wondering about it as I don't see this tire size that often.
Should I go to a more common 120 or 110?

I ride mostly technical trails - a good bit of rock here in central texas - and race
hare scrambles (C class).

I just got this email

http://www.thumpertalk.com/wiki/_/ge...al-sport+Tires.


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  #12  
Old 09-03-2014, 10:02 PM
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From what I can gather the 140/80 tires are measured in a different way (as others have said) and are FIM competition specification tires. I think the FIM spec is designed to produce a tire that has less flat contact area and therefore does not make ruts as easily as a normal spec tire.

That's how I understand it - I'm not going into the science of whether or not this is true, cause I've no idea about that.

What I do know from first hand experience, is that 140/80 tires look like a balloon when compared to an ordinary 110/100 tire. Looks like more 'roundy' sidewall and less contact area.

Definitely not a fan of how they work - I refer to the Michelin balloon that came stock on my Gasser. The tire just seemed to spin and wouldn't dig in and hook-up like a 'normal' spec size tire.

If you don't have to run FIM spec tires, I'd stay away from the 140/80 stuff.

But what do I know? I'm sure there is an expert with a better answer.

Jason
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  #13  
Old 09-04-2014, 12:24 AM
Elvis74 Elvis74 is offline
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The question is what kind of tires you are talking about.
FIM tires, I would always use a 140/80-18 because the knobs are only 13mm high and the 120/80 is very small with less contact surface to the ground.
Motocross tires, I've used one them the Michelin S12 in 140/80 and this tire is a fat pig. I would never use it again. You always have to keep in mind the differences of tires. Also there is a different way to measure, FIM tires are measured all over on the outside of the knobs. Motocross tires are sometimes measured on the outer wall and not the knobs.
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  #14  
Old 09-04-2014, 03:31 AM
swazi_matt swazi_matt is offline
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I know that the fim spec enduro tires have shorted knobs than the mx tires. I have only tried the 140/80 that came on my bike so cannot really make a comment on this, but have read that the general consensus is that the 140/80 suits a rider that spins the bike less. So if you ride like a trials rider (jarvis, birch) you will do better on the fim and if you are a more aggressive rider you will prefer the mx type
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  #15  
Old 09-04-2014, 06:34 AM
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Not sure what terrain everyone is riding but where I am ( sandy SA), I have to say the Maxxis intermediate desert tyres are the longest wearing and best feeling tyre I have used so far.
I did a 4 hr enduro, Finke pre run(entire track one way), Finke race, Hattah race
,
two mx/ enduro weekends and various other riding and the tyre is still in great shape.
In fact I have just swapped it to the Cr 500 as it was the only 120 tyre I had.
Cheers MArk
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  #16  
Old 09-04-2014, 11:35 AM
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The Metzeler Six Days tire came stock on my 2014 GG XC300R, in 140/80-18.
I just replaced it with a Maxxis Maxxcross EN in the same size.
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  #17  
Old 09-04-2014, 11:57 AM
desertgasser300 desertgasser300 is offline
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Quote:
Originally Posted by iamovru View Post
Stay far away from that tire. My buddy is riding on his last one now, he bought three and was attracted to them because of the price and those pretty little knobs. 1: they are a pain to mount, trust me, my buddy has asked me to mount and dismount two so far. 2: they wear ultra fast. One ride on them in hard pack and rocks you will see first hand.

The fronts by Sedona are great, but to make them work a tubliss @5psi is right around ideal for what I ride in.
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  #18  
Old 09-04-2014, 12:06 PM
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That's a buzz kill


Sent from my iPhone using Tapatalk
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15 Beta 300RR Race
Sold KTM 450EXC now moving over to RED! Looks like I found the right bike. Thanks REVERUP!
2011 GasGas EC300 "Stolen By A Scum Bag"
2009 450EXC Sold to Rapid Dog EURO Factory Anti-Hop slipper clutch, GPR V4, Akropovic Full Ti Exhaust, 2013 suspension and wheels.
2009 300XC
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  #19  
Old 09-05-2014, 03:50 AM
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Im going to run my half worn metz 6day extreme this weekend. . I think there's a rotation on these ..SO instead of cutting the knobs I was wondering would it be ok to turn the tyre instead? ??
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  #20  
Old 09-05-2014, 07:56 AM
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Quote:
Originally Posted by spooly View Post
Im going to run my half worn metz 6day extreme this weekend. . I think there's a rotation on these ..SO instead of cutting the knobs I was wondering would it be ok to turn the tyre instead? ??
Perfectly fine.......
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15 Beta 300RR Race
Sold KTM 450EXC now moving over to RED! Looks like I found the right bike. Thanks REVERUP!
2011 GasGas EC300 "Stolen By A Scum Bag"
2009 450EXC Sold to Rapid Dog EURO Factory Anti-Hop slipper clutch, GPR V4, Akropovic Full Ti Exhaust, 2013 suspension and wheels.
2009 300XC
2005 525 MXC
2000 WR 400
1996 XR 600
1987 CR500
1990 KX500
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