Tyre pressure Agilis 109T?

[bobf]

had a similar problem working out pressure for my 215 60 R17 109s - 17 not 16 I know but same laod rating and sidewall max pressure = 70 psi. An old tyre techo told me that the max pressure is for the max load, and the way to work out the optimum pressure is to divide the actual tyre load by the tyre load rating and multiply by max pressure rating - seemed pretty close to the money. With an all up weight of 2800kg (campervan) the tyre placard said 60psi, by calc said 46. Adam Platte at Pink Roadhouse also said 46 which is good enough for me. I found that 50 was too rough and that 45 on bitumen is the best ride and grip - no noticeable difference in fuel economy at 45 or 50. Using a reliable TPMS I found that the psi increased 6-10 psi after an hours driving, depending on ambient temp and road surface, and that increase was the same for 35 on unsealed roads, and 45, 50 and 55 on sealed roads - I think that the heavier load rating tyres seem to build up pressure more than standard tyres.

[Red Bicycle]

Great info. Thanks bobf