Author Topic: Wheel compatability  (Read 8760 times)

weeleyboy

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Re: Wheel compatability
« Reply #15 on: March 23, 2018, 10:35:27 PM »
I got a set of 4 genuine Honda 15" wheels off ebay for £229 delivered and have just fitted them with Michelin Crossclimate tyres and the difference in ride and noise levels is very apparent. Glad to have gone down this route.

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Thanks to everyone for the advice on this topic.
« Last Edit: March 30, 2018, 11:26:13 AM by RichardA »

Fell Viper

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Re: Wheel compatability
« Reply #16 on: March 24, 2018, 12:59:06 AM »
I’m interested in what difference you have noticed?
Acceleration should be sharper, but also your mpg may see an increase

I’m looking at some old civic 15”s currently mainly to increase my mpg

culzean

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Re: Wheel compatability
« Reply #17 on: March 24, 2018, 08:21:21 AM »
I’m interested in what difference you have noticed?
Acceleration should be sharper, but also your mpg may see an increase

I’m looking at some old civic 15”s currently mainly to increase my mpg

The rolling radius of the 16" with 185/55 tyres should be pretty much identical to the 15" with 175/65 tyres (otherwise your speedometer readout is FUBAR)  - when I swap 15" (winters) to 16" (summers) on wifes Jazz I don't even have to reset TPMS).   Some slight difference in mpg may just be that 15" tyres are 10mm narrower than 16" and width of tyre affects mpg,  the 'flywheel' effect of larger wheels (extra weight) does affect acceleration and mpg,  but these tested 15" to 19" and noticed around 10% better mpg,  so 16" to 15" may get a few% at most.

https://www.caranddriver.com/features/effects-of-upsized-wheels-and-tires-tested
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

weeleyboy

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Re: Wheel compatability
« Reply #18 on: March 24, 2018, 09:45:19 AM »
The harshness has gone when crossing small potholes etc and noise levels have dropped on concrete roads. The whole car feels different in a good way. Too soon to know if mpg is affected. A previous reply wondered if the look of the car would be compromised by the smaller wheels but as the o/a diameter is much the same they look fine.

culzean

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Re: Wheel compatability
« Reply #19 on: March 24, 2018, 10:25:16 AM »
The harshness has gone when crossing small potholes etc and noise levels have dropped on concrete roads. The whole car feels different in a good way. Too soon to know if mpg is affected. A previous reply wondered if the look of the car would be compromised by the smaller wheels but as the o/a diameter is much the same they look fine.

My wife would be happy if I left 175/65R15 wheels on her Jazz all year round as the ride is much improved,  I have just got her to choose some 15" alloys from mytyres and will order them next week.  Bonus is there is so much more choice and lower prices for 15" tyres than the oddball 185/55R16 standard Jazz boots.   By the time I had her 'diamond cut' 16" alloys refurbed (over £80 a corner) and paid for 16" tyres I will be well in pocket by getting 15" alloys (£53 each) and good quality 15" tyres for 1/2 to 2/3 cost of 185/55R16 .
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

Jazzdriver

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Re: Wheel compatability
« Reply #20 on: March 27, 2018, 08:31:06 PM »

when I swap 15" (winters) to 16" (summers) on wifes Jazz I don't even have to reset TPMS).   

Culzean,

Would you expand please?  Do your winter wheels have TPMS valves? I have been put off buying a set of wheels for winter tyres because my car has TPMS. 

Thanks.

culzean

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Re: Wheel compatability
« Reply #21 on: March 27, 2018, 08:59:17 PM »

when I swap 15" (winters) to 16" (summers) on wifes Jazz I don't even have to reset TPMS).   

Culzean,

Would you expand please?  Do your winter wheels have TPMS valves? I have been put off buying a set of wheels for winter tyres because my car has TPMS. 

Thanks.

As far as I know the GE Jazz only had pressure sensors fitted to wheels for 1 model year (2015 ? )  before that and for MK3 they have the ABS pulse based system that measures the rotational speed of each wheel and compares them (if you get loss of air from a tyre its rolling radius gets smaller and it has to rotate faster to keep up with other wheels ) - the ECU measures the speed of rotation of all 4 wheels by the same sensors that the ABS and VSA (vehicle stability assist) uses and will ding and put up a picture of a flat tyre on the display. My wifes GE and my Civic have the ABS based system.

I had a warning a couple of times on Civic (when I had slow air loss from a rear wheel due to under-bead alloy corrosion) when pressure dropped about 5 PSI  in a week,  and also when I had two new tyres fitted ( rolling radius of a new tyre is about 7mm bigger than a worn one) so system works pretty well, never had a false alarm.

https://clubjazz.org/forum/index.php?topic=7495.msg34931#msg34931
« Last Edit: April 02, 2018, 07:02:25 PM by culzean »
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

Jazzdriver

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Re: Wheel compatability
« Reply #22 on: April 02, 2018, 08:44:46 AM »
Culzean,

Thanks.  My Jazz is 2014 (model year 2015) with TPMS valves, so Winter Tyres would be a palaver. 

John A

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Re: Wheel compatability
« Reply #23 on: April 02, 2018, 09:23:50 AM »
Culzean,

Thanks.  My Jazz is 2014 (model year 2015) with TPMS valves, so Winter Tyres would be a palaver.

Me too, which is is why I went the all season tyre route  ;D

Fell Viper

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Re: Wheel compatability
« Reply #24 on: April 11, 2018, 12:45:58 PM »
Swapped out the OEM 16’s for some old 15” Civic VTi Fanblades, with 195/50/15 as I’m trying to keep them small!

A much nicer ride, the Jazz appears to have been designed for 15”. They fill the arches brilliantly. I hated the way the 16”s appeared recessed

culzean

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Re: Wheel compatability
« Reply #25 on: April 11, 2018, 01:04:24 PM »
Swapped out the OEM 16’s for some old 15” Civic VTi Fanblades, with 195/50/15 as I’m trying to keep them small!

A much nicer ride, the Jazz appears to have been designed for 15”. They fill the arches brilliantly. I hated the way the 16”s appeared recessed

If you are replacing 185/55R16 with 195/50R15 you will lose about 20mm on rolling radius, which will put your Speedo 7% fast. That will be in addition to normal 5 or 6% positive error on Jazz, so at indicated 70mph you will probably be doing 60. 

https://www.willtheyfit.com/index.php?width=185&aspect=55&diameter=16&wheelwidth=6&offset=40&width2=190&aspect2=50&wheel_size=15&wheel_width=6&offset2=40

I am waiting delivery of 15" alloys for her indoors Jazz to replace 16" OEM lumps,  with 175/65R15 tyres there will be no change in rolling radius from 185/55R16 but ride comfort will be much improved.

https://www.willtheyfit.com/index.php?width=185&aspect=55&diameter=16&wheelwidth=6&offset=40&width2=175&aspect2=65&wheel_size=15&wheel_width=6&offset2=40
« Last Edit: April 11, 2018, 01:35:04 PM by culzean »
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

guest7630

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Re: Wheel compatability
« Reply #26 on: April 11, 2018, 09:51:51 PM »
Hello and good evening, new member here. I came looking for advice for cvt shudder which I have found here and will get oilflushed soon. I have recently bought a Jazz auto after two manual mk7 Civics followed by an auto Civic which I still have. My question is, could I take the Civic alloys (195/60/r15) and put them on the Jazz (currently 175/65 r14 steels)

culzean

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Re: Wheel compatability
« Reply #27 on: April 12, 2018, 07:59:54 AM »
Hello and good evening, new member here. I came looking for advice for cvt shudder which I have found here and will get oilflushed soon. I have recently bought a Jazz auto after two manual mk7 Civics followed by an auto Civic which I still have. My question is, could I take the Civic alloys (195/60/r15) and put them on the Jazz (currently 175/65 r14 steels)

The difference in rolling radius between 175/65R14 and 195/50R15 is not much (about 2%) and will add to existing optimistic Jazz readout.

https://www.willtheyfit.com/index.php?width=175&aspect=65&diameter=14&wheelwidth=6&offset=40&width2=190&aspect2=50&wheel_size=15&wheel_width=6&offset2=40
« Last Edit: April 12, 2018, 10:02:47 AM by culzean »
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

guest7630

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Re: Wheel compatability
« Reply #28 on: April 12, 2018, 11:11:19 PM »
Hi Culzean, thanks for the reply. My reason for wanting to put the Civic wheels on my Jazz, is so I can keep the almost new set of Dunlop Bluresponse tyres they're wearing. I put the figures into the site you posted and as far as I can make out, they would affect the speedo in a good way, in so far as actual speed is 2mph less than indicated at 30mph and 4mph at 60. I'd be grateful for your thoughts. I like comfort under my bum, and I don't want to turn the radio up to cover road noise, the Dunlops are the lowest decibel rating I could find at 68. Also, would the increased diameter of 32mm cause any fouling issues under the arches?

RP

culzean

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Re: Wheel compatability
« Reply #29 on: April 13, 2018, 08:04:59 AM »
Hi Culzean, thanks for the reply. My reason for wanting to put the Civic wheels on my Jazz, is so I can keep the almost new set of Dunlop Bluresponse tyres they're wearing. I put the figures into the site you posted and as far as I can make out, they would affect the speedo in a good way, in so far as actual speed is 2mph less than indicated at 30mph and 4mph at 60. I'd be grateful for your thoughts. I like comfort under my bum, and I don't want to turn the radio up to cover road noise, the Dunlops are the lowest decibel rating I could find at 68. Also, would the increased diameter of 32mm cause any fouling issues under the arches?

RP

https://www.willtheyfit.com/index.php?width=175&aspect=65&diameter=14&wheelwidth=6&offset=40&width2=190&aspect2=50&wheel_size=15&wheel_width=6&offset2=40

The numbers are already in the above link, and yes the speedo will read 'fast' but only by 1.3 MPH at 60 MPH.  so it is affecting speedo in a 'good way'  (your speedo will be telling you you ar going faster than you actually are) - you can always check your speedo against a satnav reading.


I can see where Honda got their strange, rare and expensive 185/55R16 tyre size from now, they designed car for 175/65R15 tyres and rims and then wanted to 'make it look sportier' and chose the nearest rolling radius to 15" in a 16" tyre.
« Last Edit: April 13, 2018, 08:07:48 AM by culzean »
Some people will only consider you an expert if they agree with your point of view or advice,  when you give them advice they don't like they consider you an idiot

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