When going to a larger tyre size or dropping down to a lower tyre size on a set of alloy wheels it is important to make sure your vehicles rolling circumference remains the same or as close to the original rolling circumference as is possible. Sorry to hear mate. The sidewall height or "aspect ratio" of a 285/75/R16 tyre is 75% of 285mm. If one of the tyre sizes marked on the placard (eg 215/65R17) matches the marking on the tyre sidewalls, certification is not . This can be calculated using the following; RD = 2 x (60% of 215) + 16" x 25.4mm. Our tyre calculator makes this happen for you. specific new wheel diameter you've entered, aren't all suitable for your car. The condition of your tyres is imperative for the overall performance and safety of your vehicle. The New South Wales Roads and Maritime Services have released a concise document that deals with many of the new rules that surround the modification of any vehicle under 4.5 tonnes GVM, and required certification. It is similar to 315/75/16. Sponsorship welcome so long as independence is . hok0\d$(2[H6JjpL^Kf 9HLe x@j((B(G}#@)@n@!46 )) HEP cY Please choose a category from the left menu. This is why knowing how to measure your tyre tread is so important. Ive spoken to insurance companies on the past, and told them of lift kits and bigger tyres on several vehicles, and they all say Sure, no worries, Ive added it to your list of modifications and you are covered. Tyre size. What is legal/illegal? - On the road - Whirlpool.net.au As with most other jurisdictions, the wheel must be contained within the bodywork of the car, including wheel arch flares. Legal Rim/Tyre Sizes [Archive] - Australian LS1 and Holden Forums What Is A Bald Tyre and How Do I Spot One? Learn about all terrain tyres and when theyre best used. I believe Vic can go 50mm bigger diameter on tyres and a 50mm suspension lift, so a 75mm lift overall, What about Tas? For a lot of four wheel drives, 31 inch are standard tyres, so 33 inch tyres are the biggest you can legally fit (or 285s from 265s). Have a chat to ARB they might have a spring setup that suits. If you have an accident with an illegal 4WD, what happens? Cause theres no were in geraldton that is willing to do it cheers. In America, it is common for off road vehicles to see 4-6 inches of lift and 35-37 inch tires (usually on jeeps, not many twin solid axle vehicles left here) while saftey is important, the Aussie standards seem way over done. The first number on a metric tyre is the width. The overall diameter of the rim cant be more than 15mm more than manufacturer specifications, while the rim and tyre are also not allowed to foul the bodywork or suspension. We'll reach out to you as soon as we can. This tire calculator is for information . What happens when my Tyre Tread Depth is below the legal limit? Your personal driving style I dont see it changing any time soon! any chance you could help me out mate? This is perfect for us, as a 265/75/16 (one of the most popular tyre sizes around) is 803.9mm. Get recommended upgrade/replacement tire sizes, with adjustable difference variables (rim size diff./section width diff./circumference diff.) Tire Conversion Chart Bolt Pattern Finder Tire Pressure Calculator Tire Height Calculator Metric Tire Conversion Tyre Size Calculator Tire Height Chart All . 75mm lifts now legal in NSW as well as Victoria without certification However, since your tyre is always in constant friction with the road, the tread will eventually wear down. 225/50R17. Perhaps you should re-read, before you leave comments that make you look rather silly. I currently have a 3 lift with 35 tyres on a dealership purchased 2013 XLT Ranger, Ive been looking at the engineering list and sent out a few emails but noone has actually been able to put into steps just exactly needs to be done so I can avoid getting stickered. Overall original diameter means the maximum outside diameter of the largest tyre specified by the vehicles original manufacturer as an option for the vehicle, as shown on the vehicles tyre placard. P275 / 35 ZR20. Multiply a tyre's width by the aspect ratio to get aspect height (205 x 0.55 = 112.75) Convert into inches (112.75 / 25.4 = 4.44) Double the aspect height (4.44 x 2 = 8.88) Add inside diameter of tyre (8.88 + 16 = 24.88) When changing tyre size, the tyres should not have more than a 1% difference in diameter - less than 0.5% would be ideal. I have just bought a toyota 80. Input your search keywords and press Enter. Rim & Tire Size Calculator. Custom Offsets - Wheel-Size.com If we have a look at two tyre makers product lines that we have experience with in here at Adventure 4WD there's a couple of alternatives that offer far better strength. Where you frequently drive The factory size of toyota 80 is 7.5-16 or 275/70/16. Cop at an rbt chatted me about the 285/75r16 tyres that have been on the 80's wheels for the last 7 yrs. For a better experience, please enable JavaScript in your browser before proceeding. it really depends on the officer that pulls you over ,you carnt get 22 inch tyres with the legal load rating to suit the ve,the 22 inch wheel size is ok ,but put an hsv tyre plackard on just incase your . Note: Tyres showing wear on one side, or showing feathered edges to the tread pattern, are often indicative of mechanical maladjustment. Then as a bonus it shows examples of your speedometer reading with the first tyre, and the actual speed you"re traveling if you were to install the second tyre. You can use it for a wide variety of tyres including street, racetrack, trailer, spare, off-road and even extreme mud-terrain tyres. The overall diameter of the wheel and tyre combination cant be more or less than 15mm larger or smaller than specified on the manufacturers tyre placard. Reply Australia; RG.I [2012 . Alloy Wheel and Tyre Fitment Calculator. Offset, Tyre Stretch and Im in WA and have a Suzuki Grand Vitara Prestige. This 50mm is the total combination of body lifts, suspension lifts and bigger tyres. original equipment(OE) tyre, Copyright Drive.com.au 2023ABN: 84 116 608 158. you install the larger wheels on a car. The sidewall height is a percentage of the width of the tyre. TYRE UPSIZE CALCULATOR. 26-Nov-2018. However surely then if you have 1 lift and 2 bigger diameter tyres your car is now 3 off the ground and illegal? Holden Colorado - Wheel-Size.com just curious Before lay down any money, it would certainly pay to have a close look at the relevant documents to ensure that any mods you might accidentally do incorrectly wont land you in hot water further down the track. Why Buy Tires Online? If Im honest, I reckon if you do find an engineer who will approve it youll be up for a lot of money. the tire and wheel has to be adequate for your car. maybe lol - need a Gingerbeers certificate if tyres are over 7%. You will find that theres no benefit going too wide though, and it will increase the chance of it scrubbing. Your feedback, suggestions and ideas in order to help us serve you better. In NSW you are allowed to fit wheels that are up to 26mm wider than the manufacturers specified wheels without needing to notify the Roads and Traffic Authority (RTA). 198.75mm x 2 = 397.50mm. (+5% for Winter tires) of the difference between the OE overall tyre diameter and the OE wheel diameter It possibly is correct, but itd be good to know for sure. Pay for it later - in four equal instalments. I think they do this as its the only measurement that goes up with increased tyre size, suspension and body lifts. Ensure tyres have adequate tread depth. Here's all the information on the tire sidewall quickly decoded: 1) The width of the tires in millimeters. Steering and suspension issues It also solves the problem of deciding what tyre you would like to run if you have inch . Effectively, you are limited to a 50mm bigger tyre and 25mm suspension lift without engineering. This states that your roof height may only be lifted by 2 inch (or 50mm) from the factory (or standard height) before it needs to go through a lane change test. We'll come to you - at home, work or even while you shop, A beginner's guide to the basics of tyres, Learn about all replacement indicators and how to maximise the lifespan of your tyres, Learn about the maximum load a tyre can carry, The tyre pressure needs to be checked regularly. Start by entering your tyre size. The 285 is actually 7mm too big. Alternatively ring them. 1= 'c Again, the purpose of these calculators and charts isn't to give the final verdict what is the best for Tyre Repair you can enter the chosen tire size and you'll be presented with the adequate rim width range for the tire size. 5) Load index (the maximum load capacity of the tire) 6) Speed index (the maximum speed of the tire) The tire dimensions listed satisfy only one criterion in the quest for a new tire dimension, the one That is of course, unless there are other models in your range with only cosmetic changes that run bigger tyres. Anything below is considered unroadworthy. 215 / 60 R16. I would contact the department of transport for your state and get a list of the engineers, and call them. tire size or rims Choose a tab below to get fitment data for your vehicle or to find vehicles matching your criteria. Our tool gives this in percentages: a positive number is larger/wider, while a minus number represents a negative change. Use the comparison tab to see side by side comparison and speedometer error. (4th March 2011, 14:41 #4: GTO. In order to cover yourself, get any modifications that are outside of the regulations engineered. It is 15.2mm larger than that of 225/40/18(637.2mm). do it properly and get it engineered stop bring the heat on everyone that does it correctly I have a jeep wrangler thats lifted 3 inches and with the correct guards all engineered didnt cost much engineering was only 600 through double black off road melb, Good to hear its all done properly mate. A tyre size conversion calculator or tyre diameter calculator are the best ways to get the answers you are looking for. Bridgestone Desert Dueler D697 - LT285/65R17 120S - That's a 120 load index = 1,400kgs and S speed rated = 180kph. 205/60R16. The tire will stick out 15 mm farther. If your tyres are worn to the tread wear indicators (TWI) 1.6mm or below they must be replaced. OE tyre and OE wheel diameter, presented as percentage(%). Make it a habit to check them once a month. Can anyone with experience or knowledge about a 99 Hilux tell the max size tyres i can go without any dramas? I found this from Mr 4x4 in my inbox this morning. This second number is that percent. %PDF-1.6 % Discover alternate tyres based on your rim size. So that's 42.5mm increase and my suspension setup has lifted the car pretty close to 50mm. The vehicles steering or suspension geometry may need to be checked. I am unsure if there is much of a difference or not between the sizes and would like the look of the bigger tyre but dont want to significantly impede performance of the car. Selecting the right tire size for your car | Continental tires What are the shipping charges to my area? So sometimes therell be another model that has a bigger tyre placard and you can use those numbers instead of the numbers on your placard. . 1. Thank you very much. Im going to assume you dont have a 4WD? the standard tyre size is 275/70r16, and I've gone with 285/75r16. In WA you can find it online, but I cant see that for SA. Overriding previous rules, the new paperwork states that overall tyre diameter can be increased by 7% before requiring an engineers certification: Replacement of tyres that change tyre overall diameter by more than 7% of the overall original diameter.