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17 Feb 2010
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Registered Users
Veteran HUBBer
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Join Date: Feb 2010
Location: Devon UK
Posts: 123
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Rear tyre pressure (on road)
I bought my XT recently and it came with new tryes.
I would have preferred the Bridgestone or Dunlops but they fitted Kingstires.
I would like to know the correct rear tyre pressure for on road use (I know I would need to let a few pounds out for off road).
The owners manual says 21 PSI up to 90KG and 32 PSI over 90KG.
I weigh 90KG fully kitted out.
The shop I bought it from says 26 PSI rear.
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17 Feb 2010
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Registered Users
Veteran HUBBer
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Join Date: Dec 2008
Location: Denmark
Posts: 1,417
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Try it out =)
I cant feel if im running 1,5bar or 2,2bar
Its usually somewhere in between.
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17 Feb 2010
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Registered Users
Veteran HUBBer
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Join Date: Feb 2010
Location: Devon UK
Posts: 123
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I have tried it out at 26psi and 21psi.
For some reason I feel more confident leaning/cornering at 21psi in the rear.
But I just wondered if there was any science behind having tyres at certain pressures for road use.
I guess more of the tyre is in contact with the road at lower pressures.
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17 Feb 2010
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Registered Users
Veteran HUBBer
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Join Date: Aug 2009
Location: Dorset UK
Posts: 395
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You don't say what tread pattern (road, adventure ot knobbly) ?
Just set them to what YOU prefer!
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17 Feb 2010
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Moderated Users
Veteran HUBBer
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Join Date: Jan 2010
Location: California
Posts: 501
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Many riding Dual sport bikes on the road run too high a pressure, holding onto some preconceived but misguided theory left over from 500 lb. sports bikes. IIRC, your XT weighs "about" 365 lbs. wet. (166 kgs.)
Yamaha are wise to post a variance based on load/rider weight. But tire types can vary some too and of course conditions.
I think you are very close to spot on. I would run:
26 psi rear
22 psi front.
I think you will find you will get the best wear with these pressures for most dual sport 50/50 tires. Many will tell you to run 32 rear, 28 front, or even higher. I have done it and it may ride OK but tires will wear faster. A lower pressure is also much safer in any sort of wet condition and also in aggressive cornering. Trust me on this one.
If you were to load up the bike or add pillion, I'd go to maybe 30 rear, 25 front, more / less.
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18 Feb 2010
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Registered Users
Veteran HUBBer
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Join Date: Feb 2010
Location: Devon UK
Posts: 123
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Thanks for the replies.
The guy at the shop told me they are biased towards road use.
Rear tyre is 4.60 17 62S whatever that means.
Front is 90/90 -21 60T.
Mickey you are correct, the bike with oil and petrol is 365lb ish.
I'll try out 26PSI in the rear.
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