Bonneville America Forums Forums Technical Forums General Tech tire pressure question

Hi,
My 2005 America came with the dunlops. I have people telling me to put in 32 psi on front and 34 on back. Anyone have an opinion? Manual says 31/31

Thanks,
Ron

I keep about 32 front and rear in my 06.

Sometimes the manual is incorrect. it doesn't get updates as often as it should. There are OEM labels on the neck and swingarm and the tire pressures are on them but are only good for the stock tires. There is also a pressure reating on the sidewall of the tire but it is a maximum pressure at a certain load. If you are running lighter than the max then you can drop the pressure a little.

How much that you weigh has a bit of a bearing on the PSI , and if you ride two-up.

I keep front and rear between 34 and 36 PSI. Currently running Metzler tires, which are rated at 44 PSI.

Also for every 10 degrees of tire temp change the PSI will increase or decrease approximately 1 PSI. So, if you add air to increase the tire pressure to 36 PSI, and the tire temp is 80 degrees. Then you go for a long hard ride and the tire temp goes up to 100 degrees, the corresponding tire pressure should be approximately 38 PSI.

Tom

Thanks

This is a lot of stuff to think about. I have the stock tires on the bike. I am about 200lbs and periodically have my son on the back . He is around 150 pounds.

Someone told me that if you have too much air, the tires can slip out going around a turn. Is that a true statement?

Ron

Ron, if ya got too much air, the first little bump ya hit will make you well aware of that fact! i like to run about 32psi front & rear and it seems to respond well when i'm sling'n it about on 301, it is just me though, no extra weight. Give Ed's a call [Triumph Hyde park--845 454 6210] he'll have your answer

The owners manual I think recommends 32 PSI front and rear, except when riding two up, then it recommends increasing rear to 34 or 35 PSI.

I run what the owners manual recommends for the first 500 miles and then increase to 34 - 36 PSI from then on. I do this for all vehicles. Generally I run the tires at 80% of the max pressure the tire manufacturer recommends.

Tom