What is the circumference of a 27.5 tire?

1 Answers
VonJack
07/30/25 1:40am
27.5 refers to the diameter of the wheel rim, and the circumference of a 27.5 wheel set is 2115 millimeters. Interpretation of tire size: Tire sizes are usually marked on the sidewall with a series of letters and numbers. Taking a tire with the size 235/45/R18/98W as an example, it indicates a tread width of 235mm, an aspect ratio of 45%, R stands for radial tire, suitable for a rim diameter of 18 inches, a maximum load index of 750kg, and a maximum speed rating of 270km/h. Impact of tire size on vehicles: Tire size has a significant impact on a car's performance and comfort, so choosing the right tire size is very important. Of course, tires come in many specifications and sizes. Tire sizes are measured in millimeters and indicate the tire width, aspect ratio, tire type, rim diameter, load index, and speed rating.
Was this review help?
13
2
Share
More Forum Discussions

Is it okay to install ETC without using it?

It is acceptable to install ETC without using it. According to Article 9 of the "Notice on Vigorously Promoting the Development and Application of ETC on Expressways" issued by the State Council, vehicles that have not applied for or do not use ETC by 2020 will not enjoy toll discounts. In the future, expressway toll stations will retain only one manual lane, requiring vehicles to pay tolls through manual channels. ETC Working Principle: Through the dedicated short-range communication between the onboard electronic tag installed on the vehicle's windshield and the microwave antenna in the ETC lane at the toll station, the system uses computer networking technology to perform backend settlement processing with banks. This allows vehicles to pass through expressway or bridge toll stations without stopping while paying the required fees. ETC Fee Deduction Principle: The toll amount for ETC vehicles is rounded using the "round down if less than 0.5, no change if equal to or greater than 0.5" method (i.e., amounts with a decimal less than 0.5 are rounded down, while those equal to or greater than 0.5 remain unchanged). After applying a 5% discount, the amount is then rounded to the nearest cent. MTC vehicles still follow the "round to the nearest yuan" rule. All of this is based on the principle of passing first and deducting fees later. Benefits of Installing ETC: Time-saving: Eliminates the hassle of waiting in queues; Green and eco-friendly: Promotes low-carbon travel by allowing vehicles to pass toll stations without stopping, reducing noise and exhaust emissions and minimizing pollution; Reduced wear and tear: Saves costs by decreasing the frequency of vehicle starts and brakes, lowering wear and fuel consumption; Improved efficiency: Theoretically, ETC lanes can increase vehicle passing efficiency by 2-3 times, making traditional ETC more updated, faster, and more high-tech. Compared to license plate payment, ETC technology is more mature and advantageous. More policy support: The State Council explicitly stated in the "13th Five-Year Plan for the Development of a Modern Comprehensive Transportation System" that "by 2020, the interoperability of transportation cards in key city clusters will be basically achieved, and the proportion of vehicles equipped with ETC will significantly increase." It also set a clear target in the "13th Five-Year" comprehensive transportation development indicators: "By 2020, the ETC usage rate for road passenger vehicles should reach 50%." More future possibilities: In addition to continuously improving the convenience of ETC installation and usage and increasing the ETC adoption rate for passenger vehicles, efforts will be made to promote ETC usage for trucks. There will also be exploration into deeper integration between the ETC system and smart transportation directions such as vehicle-to-vehicle communication and vehicle-road coordination, providing comprehensive travel services for vehicle owners. This means more application scenarios will support ETC usage in the future.
17
4
Share

How Many Years Can a Vehicle Be Driven Before Scrapping?

Non-commercial vehicles and commercial vehicles have different scrapping periods, as detailed below: Scrapping Regulations for Non-commercial Vehicles: For household 5-seat cars and 7-seat SUVs, as well as non-commercial small and micro vehicles, there is no usage lifespan. When the normal mileage reaches 600,000 kilometers, the state will guide the scrapping. In addition to the above vehicles, small and micro non-commercial passenger cars, large non-commercial cars, and wheeled special machinery vehicles also have no usage lifespan restrictions. Common Scrapping Regulations for Commercial Vehicles: Small and micro taxi passenger vehicles have a scrapping period of 8 years, medium-sized taxi passenger vehicles have a scrapping period of 10 years, and large taxi passenger vehicles have a scrapping period of 12 years. Public transport passenger vehicles have a scrapping period of 13 years, other small and micro commercial passenger vehicles have a scrapping period of 10 years, and large and medium-sized commercial passenger vehicles have a scrapping period of 15 years. Micro commercial trucks have a scrapping period of 8 years, light and large commercial trucks have a scrapping period of 10 years. The vehicle scrapping process is as follows: The vehicle owner applying for scrapping and renewal must fill out and stamp a "Motor Vehicle Change, Transfer, Modification, Suspension, or Scrapping Application Form." The registration office will accept the application and issue a "Vehicle Scrapping Notice" for vehicles that have reached the scrapping period. For vehicles that have not reached the scrapping period, after inspection and confirmation by the motor vehicle inspection office, if they meet the scrapping standards, a "Vehicle Scrapping Notice" will be issued. The vehicle owner can choose a qualified recycling company to dismantle the vehicle with the "Notice." After verifying the "Notice," the recycling company will dismantle the vehicle and take photos. The engine must be separated from the vehicle, the engine block must be broken, and the frame (chassis) must be cut. The vehicle owner must submit the "Change Form," "XX Province Vehicle Renewal Technical Appraisal Form," "Scrapped Vehicle Recycling Certificate," and vehicle dismantling photos to the motor vehicle inspection office for verification and signature. The license plate will be reclaimed, and the scrapping registration will be processed according to regulations. Special Notes: According to Article 30 of the "Motor Vehicle Registration Regulations," if a vehicle cannot be driven back to its registration location due to damage, the owner can submit the vehicle for scrapping to a local motor vehicle recycling company. If a commercial vehicle is converted to a non-commercial vehicle, it must be scrapped according to the original commercial vehicle's scrapping period. According to Article 43 of the "Motor Vehicle Registration Regulations," after completing the transfer or cancellation of a motor vehicle's registration, the original owner can apply to use the original license plate number when registering a new vehicle. The application must meet the following conditions: (1) The application must be submitted within six months after the transfer or cancellation; (2) The owner must have owned the original vehicle for more than three years.
1
4
Share

What Causes a Significant Increase in Fuel Consumption After an Oil Change?

The reasons for a noticeable increase in fuel consumption after an oil change are as follows: 1. Excessive or insufficient oil addition: Nowadays, most cars undergo oil changes during maintenance, with mineral oil changed every six months and full synthetic oil changed annually. As a key lubricant for the engine, oil plays a crucial role. Insufficient oil can lead to inadequate lubrication, naturally resulting in higher fuel consumption. However, some people hold the misconception that more oil means better lubrication and improved engine power output. In reality, excessive oil can completely submerge the crankshaft, increasing its movement resistance, reducing power output, and potentially causing oil burning, leading to blue smoke from the exhaust and ultimately higher fuel consumption. If fuel consumption increases, the first step is to use the oil dipstick to measure the oil level, ensuring it is between the maximum and minimum marks. Otherwise, oil needs to be added or reduced. 2. Mixing different oils: If the car already exhibits oil burning, regular top-ups may be necessary. However, for most vehicles, oil is primarily replaced based on maintenance schedules. Although oil composition is relatively stable, it operates in high-temperature, high-pressure, and friction-intensive environments, leading to degradation, increased impurities, and altered performance. Therefore, during an oil change, all old oil should be drained and completely replaced with new oil to avoid affecting overall performance. Mixing oils, especially from different brands, can prevent the oil from achieving ideal lubrication. Additionally, different oils may have slight compositional differences that could react with each other, significantly reducing oil performance and ultimately increasing fuel consumption. 3. Oil viscosity is too high: The viscosity index is crucial for oil performance. Oil viscosity is divided into high-temperature and low-temperature viscosity. The choice of oil viscosity mainly depends on the local temperature environment, with the most suitable viscosity grade being the best. Too low or too high viscosity is detrimental to engine operation. After an oil change, increased fuel consumption may result from using oil with excessively high viscosity, creating excessive resistance, affecting power output, and leading to higher fuel consumption. If fuel consumption rises after an oil change, it is undoubtedly related to the oil replacement. Although oil is not a direct consumable, it directly impacts the operation of the car engine, which is reflected in fuel consumption. Therefore, in cases of high fuel consumption, promptly check the oil level, whether oils have been mixed, and whether the selected oil specifications are appropriate to quickly identify and resolve the issue.
3
0
Share

How is the color difference issue of new cars generally resolved?

Observe and record the parts of the vehicle where color differences occur, which are generally between the bumper and the body. Go to the place where the new car was purchased, submit the parts with color differences to the relevant personnel, and have them repair the vehicle.
3
0
Share

How to Locate a Volkswagen Car Using a Mobile Phone?

Open the app on your mobile phone and enter your phone number, then click login to access the main interface. After clicking 'Bind My Car', enter the 'My Car' program, click 'Owner Services', and then proceed to 'Vehicle Location' to start locating.
2
4
Share

How to Use a Fuel Discount Card?

Before using the fuel discount card, you need to log in and open the discount card page. Enter the fuel discount card password and bind it to your account. A successful binding prompt will appear. Return to the main interface, and the amount displayed in the wallet can be used.
11
1
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.