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Tyres really save fuel?
I’m posting this question here as the car in question is up for sale and I don’t want it to put off potential buyers on the other forum with them thinking there’s a problem. My frv was getting 22mpg around town and when driving on the motorway it would sound like the rear brakes were binding or a bearing was on its way out. A right drone. I've has new rear brakes, callipers pipes and fluid all genuine Honda and it still continued. honda couldn’t find anything wrong after the above. I had both front tyres replaced with budgets £45 each and the garage said the rear was ILLEGAL and gave me the car back with the space saver on. i went to another garage reluctantly to get the rear replaced (first garage didn’t have a 3rd tyre) and their cheapest budget was £80! I noticed on the next motorway drive the drone was gone and my mpg shot up to 35mpg. around town now my Mpg is around 26 but when I watch the trip computer it fluctuates a lot more then it did before. Can a decent tyre really make less noise & save that much fuel? I told the wife the frv had to go due to bad fueling.. 😂 It’s annoying having to buy 3 tires weeks before we sell it... |
Any noise is inefficiency, so the louder the noise, the greater the losses.
Simple things like checking the pressures can have a great impact on fuel efficiency and also braking distances. Tread pattern can also reduce road noise and therefore improve fuel efficiency! Although, I've never really understood why people don't pay more attention to their tyres, after all, they are the one thing keeping you on the road! |
Originally Posted by BMWhere?
(Post 12013209)
Any noise is inefficiency, so the louder the noise, the greater the losses.
Simple things like checking the pressures can have a great impact on fuel efficiency and also braking distances. Tread pattern can also reduce road noise and therefore improve fuel efficiency! Although, I've never really understood why people don't pay more attention to their tyres, after all, they are the one thing keeping you on the road! the noise was very loud for road noise. the only thing I can think is that the frv is known for bad camber and rear tyre ware. Maybe the 2 combined caused it. i would never had thought it would cause that much drag though. |
Short answer, yes, noise, mpg, grip, etc etc....a crap tyre and the car will drag type effect.
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I would bet the difference between best and worst is no more than a tank or 2 over life of the tyre.
More often the effecient ones are pants for performance |
Driving through binding brakes and fecked wheel bearing will obviously increase fuel economy by a noticable amount
you certainly wouldnt notice a difference with onboard computers mpg just by changing tyres unless u made a circumference change. |
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Saw-toothed, deformed tyre. Makes a right racket, also causes a load of drag.
Very common these days, possibly due to Asymmetric and Directional tyre structures (never noted it happen on a symetrical/bidirectional tyre). Seems to happen after the sipes have worn away on the inner part of the tyre- I'm guessing the loss of the sipes mean the tread blocks cannot flex in a uniform manner, causing noise, drag, and possibly heat on motorway trips which would cause further deformation. Almost always happens on the rear :wonder: if you drive on a dusty floor (our workshop floor is ideal for this :lol1: ) then look at the inner-most tread blocks you will find maybe three clean tread blocks and then a further two dusty, then maybe two clean, then four dusty etc over the whole circumference, and the blocks themselves aren't worn evenly - more of a sawtooth pattern, hence the technical term "sawtoothing". Anyhoo, just swapped to Michelin Primacy 4 and after 2000miles of mostly motorway its getting an average 2mpg improvement over the RE050s and Goodyear Efficient-Grips that was the previous two sets used in the same conditions, and both sawtoothed after they had worn past 4mm. Btw, the fuel calcs worked out at about 6€ less per 1000miles. Savings in UK could be a bit more as fuel is more expensive...providing you can average 120km/h, which you can't unless you drive around at 4:00am ;) |
Here's a question for the OP:
Ever noticed the difference riding a mountain bike with off-road knobblies and one with so-called town tyres? You put far more effort in riding on the road with knobblies, so a car will be the same, tread patterns do make a hell of a difference. |
Rep car i bought ( mondeo ) had michelin primacy . - this would have been costed in
along with the dmf letting go 5k after i go it :rolleyes: |
I only opted for them for the wet grip (A) vs noise (69db). It's rated C for economy so any gain was a unexpected bonus.
Interestingly these fuel/grip/noise ratings vary depending on load index and speed ratings, even on the same size tyre. |
Originally Posted by SmurfyBhoy
(Post 12013213)
I would bet the difference between best and worst is no more than a tank or 2 over life of the tyre.
More often the effecient ones are pants for performance Which is easily the difference between a budget and high performance tyre. :thumb: |
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