Clubjazz - Honda Jazz & HR-V Forums
Honda Jazz Forums => Honda Jazz Mk1 2002-2008 => Topic started by: Ed the Jazz on April 23, 2018, 10:42:00 PM
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An old problem - 2004 sport CVT ride is mega uncomfortable. Changed front tyres to Dunlop Blue response which are better at dampening road noise but at 32psi seem soft. At 33psi-35psi smooth ride and steering but over rough roads (most roads now) thuds through the front suspension. I have 4 tyre gauges and 3 give different readings - an 'accurate' quality dial gauge which I trust as being accurate, a Michelin foot pump which reads approx 3-4psi lower than the dial, 2 Dunlop style stick gauges which both read the identical pressures but approx 2-3 psi lower than the dial. Ride is reasonable (for a Jazz) at 32F/30R psi set with the dial gauge but I worry that pressure is too low! Last forecourt gauge I tried read 4-5psi higher than the dial gauge even when tyres are cold. Is a range of pressures 4psi acceptable?
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What size are your tyres ? The 16" Honda wheels with 185/55R16 tyres are not made for comfort :-X, I have just fitted 175/65R15 tyres and wheels to her indoors Mk2 (the ride was so much better with 175/65R15 winter tyres and steel wheels that she wanted 15" wheels on all year round).
If tyres are under-inflated the edges will wear before centre of tyre and MPG will be worse, and if over-inflated centre will wear before edges. My TPMS squawked at me the other day because one of my front tyres was about 3 psi over-inflated.
The stick gauges are normally reasonably accurate in my experience (if they have been looked after and are not full of dirt from rolling around in a car boot) so I would trust them over a inexpensive dial gauge, and digital gauges can give 'an illusion of accuracy' because there is a nice number to look at, my Michelin footpump dial gauge is also pretty accurate - I would trust the reading of 3 out of 4 devices as they seem to match up fairly well as they are all reading lower than the one dial gauge. Garage forecourt gauges are a bit hit and miss - if I ever use one I always check pressure afterwards with a stick gauge. Radial tyres always look a bit bulgy and soft due to supple sidewalls.
General advice is fill your tyre at a service station and then check it with all your gauges, if any of your gauges agrees with the service station pressure then you should bin it.