 Tire pressures
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Joined: Jan 2005
Posts: 2,240
Oil Expert
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OP
Oil Expert
Joined: Jan 2005
Posts: 2,240 |
So on the Vin label on the steering neck of the '04 SM, it also shows tire sizes and recommended tire pressures (36/36, F/R). The '09 SM label shows 30/30 (F/R), for the same exact tires. What's up with that? 
Keith
Houston
Ridin'Texas
'04 Speedmaster
AI removed, Pingle, UNI Filter, 1 shim, straight-through slash-cut TORs, Stage 1 DynaJet, 140 mains, 3 turns, 16/42 final drive, 115K
2020 T120 Black
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 Re: Tire pressures
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Joined: Sep 2010
Posts: 8,393 Likes: 1
Second Wind
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Second Wind
Joined: Sep 2010
Posts: 8,393 Likes: 1 |
I don't know why they do that. I always use the tire manufacturer spec. The tires are load range specific and speed range specific. So if you buy a tire that is a load range and speed range match for you bike weight with you and your riding gear on it then go with the tire manufacturers recommendation for tire pressure. Its had to go wrong that way. You will go good life out of the tires too.
I have no faith in human perfectability. I think that human exertion will have no appreciable effect upon humanity. Man is now only more active - not more happy - nor more wise, than he was 6000 years ago.
Edgar Allan Poe
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Re: Tire pressures
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Joined: Jan 2005
Posts: 2,240
Oil Expert
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OP
Oil Expert
Joined: Jan 2005
Posts: 2,240 |
I've been running them at the recommended 30 psi on the '09, but I am going to bump it.
On the '04, I can sure tell if they are under-inflated, and don't like the when they are over-inflated much, either. On that bike, 36/36 really feels just about right. If I have a tire that wants to lose a lb. or two over a week, I might add an extra lb. or two, but not too much.
Still feeling this '09 out. Feels lighter and softer sprung. I'm thinking I need to do the Progressive front fork springs, but I'll wait until I have at least 20K miles on her first.
Keith
Houston
Ridin'Texas
'04 Speedmaster
AI removed, Pingle, UNI Filter, 1 shim, straight-through slash-cut TORs, Stage 1 DynaJet, 140 mains, 3 turns, 16/42 final drive, 115K
2020 T120 Black
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Re: Tire pressures
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Joined: Feb 2007
Posts: 23,243 Likes: 64
Fe Butt
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Fe Butt
Joined: Feb 2007
Posts: 23,243 Likes: 64 |
Quote:
I don't know why they do that. I always use the tire manufacturer spec. The tires are load range specific and speed range specific. So if you buy a tire that is a load range and speed range match for you bike weight with you and your riding gear on it then go with the tire manufacturers recommendation for tire pressure. Its had to go wrong that way. You will go good life out of the tires too.
Actually, the tire pressure on the tire is maximum inflation at maximum load and you should , in most cases, follow the vehicle manufacturers specifications. A tire deforms according to the amount of load applied and that is where the manufacturer gets the recommended inflation. If you go with what is on the side of the tire and have a good alignment in most cases the center of the tire will wear due to over inflation.
I learned all I need to know about life by killing smart people and eating their brains.
Eat right ,Exercise ,Stay fit, Die Anyway!
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