Tyre News » Tyre Sizes

How To Find Your Tyre Size

admin — Mon, 01 Feb 2010 15:55:13 +0000

When looking for the size of your car tyres the only accurate way to find it is to look on the sidewall of your tyre. Looking in your cars handbook or using registration look-ups provided by some websites are not accurate methods when looking for your tyre size.

The majority of cars now come with different size options for wheels and tyres so there is no such thing as a standard tyre size anymore. Add this to the fact that some cars have a different tyre size on the front to the tyre size on the rear. Finding your tyre size is easy if you know what to look for …

The tyre size will be on the sidewall of each tyre and will be set out in the following format although the numbers and letters could be different

205 / 55 R 16 91W

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3G RFT – Bridgestone 3rd Generation Run-Flat Tyres

admin — Wed, 27 Jan 2010 11:00:00 +0000

Bridgestone Tyres are moving closer to the release of their “3rd Generation Run-Flat Tyres” or “3G RFT“. While run-flat tyres are designed with safety as a priority, they have a reputation for making the ride quality overly firm and uncomfortable due to the reinforced tyre sidewall. This has led many drivers to replace their run-flat tyres with conventional tyres.

BRIDGESTONE 3G RFT UPDATE (16th July 2010)

Bridgestone claim that their latest 3rd generation run-flat tyres offer the same level of safety as previous run-flat tyres with vastly increased ride quality thanks to a tyre sidewall only 5% stiffer than a conventional tyre.

The key to reducing sidewall stiffness lies within “Heat Control”. When tyres are run at reduced or zero pressure, the friction on the distorted sidewall rapidly generates heat which can quickly destroy a tyre. Bridgestone Tyres have implemented three new technologies that reduce the heat generated by a tyre under run-flat conditions.

A new sidewall reinforced rubber reduces heat by 50% compared to previous run-flat tyres. Bridgestone have adopted “NanoPro-Tech” which reduces the friction that occurs between carbon molecules in the sidewall rubber which reduces heat build up. This allows for a softer tyre sidewall.

A “New Ply” fibre reduces tyre sidewall deformation by contracting as any heat builds up. This contraction of the tyre sidewall reduces deformation and prevents a rapid increase in temperature.

Protrusions in the tyre sidewall known as “Cooling Fins” create disturbances in the air flow around a tyre causing heat in the tyre sidewall to be reduced when driving on tyres that have zero pressure.

Tyre manufacturers are hoping this new run-flat technology will allow run-flat tyres to be produced in tyre sizes that have previously proved problematic increasing the safety for drivers across a broader range of vehicles.

Bridgestone have yet to confirm release dates and sizes for their 3rd generation run-flat tyres although they were hoping to launch them towards the end of 2009.

New Tyre Sizes – Michelin Pilot Sport 3 (PS3)

admin — Wed, 30 Dec 2009 10:01:54 +0000

With the Michelin Pilot Sport 3 set to be released on 1st January 2010, many people have been asking us about the sizes to be released and whether this means the Pilot Sport 2 will now be discontinued. The word we have directly from Michelin is that initially the Pilot Sport 3 will run alongside the Pilot Sport 2. As we get further information on new sizes and what, if anything, is discontinued we will update our blog.

The Pilot Sport 3 is being released in several stages. 18 tyre sizes are being released on 1st January 2010 with a further 10 sizes estimated to be released between July 2010 and October 2010.

Michelin Pilot Sport 3 sizes being released 1st January 2010 are:

225/45 ZR17 91Y
225/40 ZR18 92Y XL
225/40 ZR18 92W XL
225/45 ZR17 94W XL
235/40 ZR18 95Y XL
235/45 ZR17 97Y XL
245/40 ZR17 91Y
245/40 ZR18 97Y XL
245/45 ZR17 99Y XL
255/35 ZR18 94Y XL
265/35 ZR18 97Y XL
255/40 ZR19 100Y XL
275/35 ZR18 99Y XL
275/40 ZR19 101Y XL
245/40 ZR19 98Y XL
255/40 ZR18 99Y XL MO1 (Mercedes Fitment)
285/35 ZR18 101Y XL MO1 (Mercedes Fitment)
255/35 ZR19 96Y AO (Audi Fitment)

Michelin Pilot Sport 3 sizes estimated to be released between July 2010 and October 2010 are:

205/40 R17 84W XL
225/45 R17 94Y XL
205/45 R16 83V
205/45 R16 87W XL
195/45 R16 84V XL
205/55 R16 91W
205/45 R17 88W XL
205/50 R17 93W XL
205/50 R16 87V

Any further information or release updates that we get on the Pilot Sport 3 will be released through our blog.