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Assuming you are riding by yourself (which you do), Triumph says 33 PSI front & rear is the correct pressure......measured when tires are cold....i.e., not right after a ride.

JOHN
 

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I am running the stock tyres on my Thruxton and when I used to run the recommended 33 PSI for front and back when solo riding the bike never felt very solid, especially in corners. For me I have 35 psi in the front and 38 psi in the back and seems alot better. Maybe I'm just imagining it but seems that way.
 

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Well, for what it's worth... for the stock Metzelers, the Hinckley factory service manual shows 33 front and 38 rear - but then what do they know....
 

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Westcoaster - that's weird, cause the owners manual says 33 PSI Front & Rear if riding solo??? :???:

I have the Service Manual also......I'll have to check that out.

JOHN
 

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Click this link for the official word on tire pressure (on page 96). They recommend 33 psi front / 38 psi rear, regardless of whether you are riding solo or with a passenger.

Bonneville/Thruxton Manual

One time my rear tire had lost some air with a slow leak over the course of several days, and I noticed it felt really funny going around corners. I checked the tires and found the rear pressure at only 32 psi. Back up to 38 psi, handling problem was solved.

Edited to add: I just looked at the spec for the Thruxton in the online PDF manual in the above link. It differs from the Bonneville and T100, with recommended psi of 33/33 solo and 38/38 fully laden. This has to be a misprint in the manual (a potentially dangerous misprint), since it doesn't seem to make sense and also contradicts the tire pressure info printed directly on the bike's frame sticker.



[ This message was edited by: JG on 2007-01-18 11:25 ]
 

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I recall the Triumph service book say's 33PSI front and back when riding solo. Haynes Service manual says 33 up front and 38 back. I have always felt my Thruxton handles better with the extra air in the back tyre.

Was just wondering how the stock tyres compare to other well known brands who those of you who have changed tyres. I still have the stock tyres but have always felt they aren't the greatest but hard to know without having put different tyres on yet.
 

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There is also a placard on the bike recomending 33 front/38 rear. That being said, at my 145 lbs., 35 rear actually feels better and I have not noticed any bad wear patterns. Seems to have more grip for me. But if it leaks down to 33, I can tell.
 

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Well, I decided to check my Triumph service manual (Part Number T3859909-01 Issue 4, 10.2004). On page 14.8, it lists tire pressures for Bonneville, T100, and Thruxton all in one table:

Solo: 33 front, 38 rear
Fully laden: 33 front, 38 rear

Since the sticker on the Thruxton frame also says 33 front, 38 rear, it seems confirmed that the owner's manual pressures for the Thruxton (on page 98 of the owner's manual) are misprinted. I have seen plenty of misprints in motorcycle manuals before, so it's not that surprising.

[ This message was edited by: JG on 2007-01-18 16:50 ]
 
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