Geekzone: technology news, blogs, forums
Guest
Welcome Guest.
You haven't logged in yet. If you don't have an account you can register now.


View this topic in a long page with up to 500 replies per page Create new topic
1 | 2 | 3 
5390 posts

Uber Geek


  # 1405747 14-Oct-2015 15:23
Send private message

from memory steelmate, TyreHawk

Suggest you start at the the Play store and use TPMS as a search term.  That will lead you to some of the producers.



pdath:
 

And you can get systems that work with your phone or android head unit too. 


Can you tell me the brand name of some of these systems?  I think I'll look into it further.




Mike

n4

956 posts

Ultimate Geek


  # 1405754 14-Oct-2015 15:41
Send private message

MikeAqua: Using EECAs own figures (https://www.energywise.govt.nz/energy-labels/energywise-approved-tyres/ accessed 14/10/15): -

Energy-wise tyres cost $25 more per tyre ($100 per set) and save $500 of fuel over 40,000km (2.85 years motoring for average kiwi car)

A net total saving of ($500 -$100)/40,000km =  $0.01/km saved compared to standard budget tyre i.e. an inconsequential saving.

I also note that the math works out suspiciously neatly.


Actually the $500 saving is after the extra cost of the tyres ($516 if you work it out). But agreed it is not going to change your life.




Huawei Mate 7, on 2degrees

 
 
 
 


8913 posts

Uber Geek


  # 1405788 14-Oct-2015 16:27
Send private message

1eStar: Silica is sand. It's hard and resists wear. It's inclusion means a stickier (and inherently faster wearing) rubber compound can be used without it wearing out so fast. There's no magic involved. There is an inverse relationship between grip and durability. Choose which one you want and purchase the tyre with that characteristic.


The silica in tyres is amorphous (non crystalline) precipitated powder - not hard at all - or it wouldn't be used in toothpaste, food etc. It's use to substitute carbon black in "green" tyres might be partly to do with mechanical properties of the rubber, but I believe a main reason is reduction in greenhouse gas emissions from carbon black production (from burning oil).  That said, silica is also used in tyres with no "green" label etc, and has been for decades.

Some "green" Yokohama tyres the local tyre guy recommended for SWMBO's MX5 I believe had claim to use of high silica, low rolling resistance, and use of "orange oil" (d-limonene or similar?) to substitute some mineral oils in the compound.  I was skeptical that compromises would be made in wet and dry grip, but where tested against conventional tyres they performed right at the top.  The tyre shop dude assured me that the compromise was tread life - they wouldn't last as long as conventional tyres - but the car doesn't do a lot of mileage, is very light, and the tyres I was replacing (Falkens - which had been excellent) still had plenty of remaining tread, but they were old and starting to lose wet-grip.

858 posts

Ultimate Geek

Trusted

  # 1405937 14-Oct-2015 20:29
2 people support this post
Send private message

I'm not interested in performance 'tyres'... I worked out unless the eco tyre is no more than $15 ea over a similar there was no fuel efficiency benefit at least for me, that said I found the Ecopia's I tried last twice the distance of the Conti Sport Contacts the car came with [on the same wheels and car]

Personally I'd rather see better tyre recycling in NZ

 

22739 posts

Uber Geek

Trusted
Subscriber

  # 1405959 14-Oct-2015 21:08
Send private message

A tiny change in diameter can have a signifigant effect on what the onboard fuel usage things display, and as it also affects the odometer you cant really calculate it yourself.

But I am sure that no eco tyre could be as bad as the supercats that the tyre shop suggested as a cheaper alternative to put on my falcon. In the wet basically have to not press the gas and coast away from traffic lights or it will spin.




Richard rich.ms

13555 posts

Uber Geek

Trusted
Lifetime subscriber

  # 1405981 14-Oct-2015 21:57
Send private message

Inphinity:
joker97:

Let me expand - I think dry performance is pretty close between tyres at under 120kph (I could be wrong). Hence to me the wet separates the real deals from the pretenders.


There is a huge gap in braking distance even in the dry between cheap/eco tyres and good performance tyres. The gap between Eco and budget tyres, though, is a different story - a good Eco is often better.


I had a very keen braking moment this afternoon when 3 ducks walked out in front of my car. Dry road, probably doing around 65 at the time - car stopped like it was glued to the road. No problem with eco tyres there.





8947 posts

Uber Geek

Lifetime subscriber

  # 1407048 15-Oct-2015 07:56
Send private message

richms: A tiny change in diameter can have a signifigant effect on what the onboard fuel usage things display, and as it also affects the odometer you cant really calculate it yourself.



mine still has factory size tyres on it, but as you know the actual size differs between brands so my fuel usage reading are about .3L/100km different to the ones i work out based on KM and L used. But the KM driven is probably out by a little too so there is no way to know the actual.

 
 
 
 


1255 posts

Uber Geek


  # 1407410 15-Oct-2015 19:24
Send private message

Geektastic:
Inphinity:
joker97:

Let me expand - I think dry performance is pretty close between tyres at under 120kph (I could be wrong). Hence to me the wet separates the real deals from the pretenders.


There is a huge gap in braking distance even in the dry between cheap/eco tyres and good performance tyres. The gap between Eco and budget tyres, though, is a different story - a good Eco is often better.


I had a very keen braking moment this afternoon when 3 ducks walked out in front of my car. Dry road, probably doing around 65 at the time - car stopped like it was glued to the road. No problem with eco tyres there.


haven't you seen the road safety ads with the spooky voice ?

you're not supposed to swerve or take drastic evasive action for animals.

tongue-out   wink

199 posts

Master Geek


  # 1408942 19-Oct-2015 01:13
Send private message

richms: A tiny change in diameter can have a signifigant effect on what the onboard fuel usage things display, and as it also affects the odometer you cant really calculate it yourself.


Not as much as you might think - it's deceptive. For example, going from a 215/60R15 to a 215/70R15 is only 6.7% increase in rolling diameter but the 215/70R15 is a 43mm taller tyre if you put them side-by-side. Same for going from a 225/50R17 to a 225/60R17 which is 6.8%. Also for a 225/60R17 going from a full tread of 8mm to 2mm it's only a 1.7% increase in tyre rotation for the same indicated speed - less than the factory built-in error of the speedometer (odometers are usually spot on).

1 | 2 | 3 
View this topic in a long page with up to 500 replies per page Create new topic



Twitter and LinkedIn »



Follow us to receive Twitter updates when new discussions are posted in our forums:



Follow us to receive Twitter updates when news items and blogs are posted in our frontpage:



Follow us to receive Twitter updates when tech item prices are listed in our price comparison site:





News »

Intel introduces cryogenic control chip to enable quantum computers
Posted 10-Dec-2019 21:32


Vodafone 5G service live in four cities
Posted 10-Dec-2019 08:30


Samsung Galaxy Fold now available in New Zealand
Posted 6-Dec-2019 00:01


NZ company oDocs awarded US$ 100,000 Dubai World Expo grant
Posted 5-Dec-2019 16:00


New Zealand Rugby Selects AWS-Powered Analytics for Deeper Game Insights
Posted 5-Dec-2019 11:33


IMAGR and Farro bring checkout-less supermarket shopping to New Zealand
Posted 5-Dec-2019 09:07


Wellington Airport becomes first 5G connected airport in the country
Posted 3-Dec-2019 08:42


MetService secures Al Jazeera as a new weather client
Posted 28-Nov-2019 09:40


NZ a top 10 connected nation with stage one of ultra-fast broadband roll-out completed
Posted 24-Nov-2019 14:15


Microsoft Translator understands te reo Māori
Posted 22-Nov-2019 08:46


Chorus to launch Hyperfibre service
Posted 18-Nov-2019 15:00


Microsoft launches first Experience Center worldwide for Asia Pacific in Singapore
Posted 13-Nov-2019 13:08


Disney+ comes to LG Smart TVs
Posted 13-Nov-2019 12:55


Spark launches new wireless broadband "Unplan Metro"
Posted 11-Nov-2019 08:19


Malwarebytes overhauls flagship product with new UI, faster engine and lighter footprint
Posted 6-Nov-2019 11:48



Geekzone Live »

Try automatic live updates from Geekzone directly in your browser, without refreshing the page, with Geekzone Live now.


Support Geekzone »

Our community of supporters help make Geekzone possible. Click the button below to join them.

Support Geezone on PressPatron



Are you subscribed to our RSS feed? You can download the latest headlines and summaries from our stories directly to your computer or smartphone by using a feed reader.

Alternatively, you can receive a daily email with Geekzone updates.